Common Weakness Enumeration

CWE-416

Use After Free

The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

CVE-2026-48563 (GCVE-0-2026-48563)

Vulnerability from cvelistv5 – Published: 2026-06-09 17:05 – Updated: 2026-07-08 23:23
VLAI
Title
Remote Desktop Client Remote Code Execution Vulnerability
Summary
Use after free in Remote Desktop Client allows an unauthorized attacker to execute code over a network.
Severity
7.5 (High)
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
Assigner
References
Impacted products
Vendor Product Version
Microsoft Windows 10 Version 1809 Affected: 10.0.17763.0 , < 10.0.17763.8880 (custom)
Create a notification for this product.
Microsoft Windows 10 Version 21H2 Affected: 10.0.19044.0 , < 10.0.19044.7417 (custom)
Create a notification for this product.
Microsoft Windows 10 Version 22H2 Affected: 10.0.19045.0 , < 10.0.19045.7417 (custom)
Create a notification for this product.
Microsoft Windows 11 version 23H2 Affected: 10.0.22631.0 , < 10.0.22631.7219 (custom)
Create a notification for this product.
Microsoft Windows 11 Version 23H2 Affected: 10.0.22631.0 , < 10.0.22631.7219 (custom)
Create a notification for this product.
Microsoft Windows 11 Version 24H2 Affected: 10.0.26100.0 , < 10.0.26100.8655 (custom)
Create a notification for this product.
Microsoft Windows 11 Version 25H2 Affected: 10.0.26200.0 , < 10.0.26200.8655 (custom)
Create a notification for this product.
Microsoft Windows 11 version 26H1 Affected: 10.0.28000.0 , < 10.0.28000.2269 (custom)
Create a notification for this product.
Microsoft Windows Server 2019 Affected: 10.0.17763.0 , < 10.0.17763.8880 (custom)
Create a notification for this product.
Microsoft Windows Server 2019 (Server Core installation) Affected: 10.0.17763.0 , < 10.0.17763.8880 (custom)
Create a notification for this product.
Microsoft Windows Server 2022 Affected: 10.0.20348.0 , < 10.0.20348.5256 (custom)
Create a notification for this product.
Microsoft Windows Server 2025 Affected: 10.0.26100.0 , < 10.0.26100.32995 (custom)
Create a notification for this product.
Microsoft Windows Server 2025 (Server Core installation) Affected: 10.0.26100.0 , < 10.0.26100.32995 (custom)
Create a notification for this product.
Date Public
2026-06-09 14:00
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-48563",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-06-10T03:57:10.513239Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-06-10T10:23:56.329Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "platforms": [
            "32-bit Systems",
            "x64-based Systems"
          ],
          "product": "Windows 10 Version 1809",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.17763.8880",
              "status": "affected",
              "version": "10.0.17763.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "32-bit Systems",
            "ARM64-based Systems",
            "x64-based Systems"
          ],
          "product": "Windows 10 Version 21H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.19044.7417",
              "status": "affected",
              "version": "10.0.19044.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "32-bit Systems",
            "ARM64-based Systems",
            "x64-based Systems"
          ],
          "product": "Windows 10 Version 22H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.19045.7417",
              "status": "affected",
              "version": "10.0.19045.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "ARM64-based Systems"
          ],
          "product": "Windows 11 version 23H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.22631.7219",
              "status": "affected",
              "version": "10.0.22631.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows 11 Version 23H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.22631.7219",
              "status": "affected",
              "version": "10.0.22631.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "ARM64-based Systems",
            "x64-based Systems"
          ],
          "product": "Windows 11 Version 24H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.26100.8655",
              "status": "affected",
              "version": "10.0.26100.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "ARM64-based Systems",
            "x64-based Systems"
          ],
          "product": "Windows 11 Version 25H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.26200.8655",
              "status": "affected",
              "version": "10.0.26200.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "ARM64-based Systems",
            "x64-based Systems"
          ],
          "product": "Windows 11 version 26H1",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.28000.2269",
              "status": "affected",
              "version": "10.0.28000.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2019",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.17763.8880",
              "status": "affected",
              "version": "10.0.17763.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2019 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.17763.8880",
              "status": "affected",
              "version": "10.0.17763.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2022",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.20348.5256",
              "status": "affected",
              "version": "10.0.20348.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2025",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.26100.32995",
              "status": "affected",
              "version": "10.0.26100.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2025 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.26100.32995",
              "status": "affected",
              "version": "10.0.26100.0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x86:*",
                  "versionEndExcluding": "10.0.17763.8880",
                  "versionStartIncluding": "10.0.17763.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.17763.8880",
                  "versionStartIncluding": "10.0.17763.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.17763.8880",
                  "versionStartIncluding": "10.0.17763.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.20348.5256",
                  "versionStartIncluding": "10.0.20348.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_10_21H2:*:*:*:*:*:*:x86:*",
                  "versionEndExcluding": "10.0.19044.7417",
                  "versionStartIncluding": "10.0.19044.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_10_22H2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "10.0.19045.7417",
                  "versionStartIncluding": "10.0.19045.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.26100.32995",
                  "versionStartIncluding": "10.0.26100.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_11_25H2:*:*:*:*:*:*:arm64:*",
                  "versionEndExcluding": "10.0.26200.8655",
                  "versionStartIncluding": "10.0.26200.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_11_23H2:*:*:*:*:*:*:arm64:*",
                  "versionEndExcluding": "10.0.22631.7219",
                  "versionStartIncluding": "10.0.22631.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_11_23H2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "10.0.22631.7219",
                  "versionStartIncluding": "10.0.22631.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_11_24H2:*:*:*:*:*:*:arm64:*",
                  "versionEndExcluding": "10.0.26100.8655",
                  "versionStartIncluding": "10.0.26100.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.26100.32995",
                  "versionStartIncluding": "10.0.26100.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_11_26H1:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "10.0.28000.2269",
                  "versionStartIncluding": "10.0.28000.0",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "datePublic": "2026-06-09T14:00:00.000Z",
      "descriptions": [
        {
          "lang": "en-US",
          "value": "Use after free in Remote Desktop Client allows an unauthorized attacker to execute code over a network."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C",
            "version": "3.1"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en-US",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-416",
              "description": "CWE-416: Use After Free",
              "lang": "en-US",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-07-08T23:23:28.368Z",
        "orgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8",
        "shortName": "microsoft"
      },
      "references": [
        {
          "name": "Remote Desktop Client Remote Code Execution Vulnerability",
          "tags": [
            "vendor-advisory",
            "patch"
          ],
          "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-48563"
        }
      ],
      "title": "Remote Desktop Client Remote Code Execution Vulnerability"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8",
    "assignerShortName": "microsoft",
    "cveId": "CVE-2026-48563",
    "datePublished": "2026-06-09T17:05:11.563Z",
    "dateReserved": "2026-05-21T20:00:35.245Z",
    "dateUpdated": "2026-07-08T23:23:28.368Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

CVE-2026-48583 (GCVE-0-2026-48583)

Vulnerability from cvelistv5 – Published: 2026-06-09 17:05 – Updated: 2026-07-08 23:23
VLAI
Title
Windows Kernel Elevation of Privilege Vulnerability
Summary
Use after free in Windows Kernel allows an authorized attacker to elevate privileges locally.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
Assigner
References
Impacted products
Vendor Product Version
Microsoft Windows 10 Version 1607 Affected: 10.0.14393.0 , < 10.0.14393.9234 (custom)
Create a notification for this product.
Microsoft Windows 10 Version 1809 Affected: 10.0.17763.0 , < 10.0.17763.8880 (custom)
Create a notification for this product.
Microsoft Windows 10 Version 21H2 Affected: 10.0.19044.0 , < 10.0.19044.7417 (custom)
Create a notification for this product.
Microsoft Windows 10 Version 22H2 Affected: 10.0.19045.0 , < 10.0.19045.7417 (custom)
Create a notification for this product.
Microsoft Windows 11 version 23H2 Affected: 10.0.22631.0 , < 10.0.22631.7219 (custom)
Create a notification for this product.
Microsoft Windows 11 Version 23H2 Affected: 10.0.22631.0 , < 10.0.22631.7219 (custom)
Create a notification for this product.
Microsoft Windows 11 Version 24H2 Affected: 10.0.26100.0 , < 10.0.26100.8655 (custom)
Create a notification for this product.
Microsoft Windows 11 Version 25H2 Affected: 10.0.26200.0 , < 10.0.26200.8655 (custom)
Create a notification for this product.
Microsoft Windows 11 version 26H1 Affected: 10.0.28000.0 , < 10.0.28000.2269 (custom)
Create a notification for this product.
Microsoft Windows Server 2016 Affected: 10.0.14393.0 , < 10.0.14393.9234 (custom)
Create a notification for this product.
Microsoft Windows Server 2016 (Server Core installation) Affected: 10.0.14393.0 , < 10.0.14393.9234 (custom)
Create a notification for this product.
Microsoft Windows Server 2019 Affected: 10.0.17763.0 , < 10.0.17763.8880 (custom)
Create a notification for this product.
Microsoft Windows Server 2019 (Server Core installation) Affected: 10.0.17763.0 , < 10.0.17763.8880 (custom)
Create a notification for this product.
Microsoft Windows Server 2022 Affected: 10.0.20348.0 , < 10.0.20348.5256 (custom)
Create a notification for this product.
Microsoft Windows Server 2025 Affected: 10.0.26100.0 , < 10.0.26100.32995 (custom)
Create a notification for this product.
Microsoft Windows Server 2025 (Server Core installation) Affected: 10.0.26100.0 , < 10.0.26100.32995 (custom)
Create a notification for this product.
Date Public
2026-06-09 14:00
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-48583",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-06-10T03:56:11.825145Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-06-10T10:22:23.807Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "platforms": [
            "32-bit Systems",
            "x64-based Systems"
          ],
          "product": "Windows 10 Version 1607",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.14393.9234",
              "status": "affected",
              "version": "10.0.14393.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "32-bit Systems",
            "x64-based Systems"
          ],
          "product": "Windows 10 Version 1809",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.17763.8880",
              "status": "affected",
              "version": "10.0.17763.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "32-bit Systems",
            "ARM64-based Systems",
            "x64-based Systems"
          ],
          "product": "Windows 10 Version 21H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.19044.7417",
              "status": "affected",
              "version": "10.0.19044.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "32-bit Systems",
            "ARM64-based Systems",
            "x64-based Systems"
          ],
          "product": "Windows 10 Version 22H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.19045.7417",
              "status": "affected",
              "version": "10.0.19045.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "ARM64-based Systems"
          ],
          "product": "Windows 11 version 23H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.22631.7219",
              "status": "affected",
              "version": "10.0.22631.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows 11 Version 23H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.22631.7219",
              "status": "affected",
              "version": "10.0.22631.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "ARM64-based Systems",
            "x64-based Systems"
          ],
          "product": "Windows 11 Version 24H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.26100.8655",
              "status": "affected",
              "version": "10.0.26100.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "ARM64-based Systems",
            "x64-based Systems"
          ],
          "product": "Windows 11 Version 25H2",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.26200.8655",
              "status": "affected",
              "version": "10.0.26200.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "ARM64-based Systems",
            "x64-based Systems"
          ],
          "product": "Windows 11 version 26H1",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.28000.2269",
              "status": "affected",
              "version": "10.0.28000.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2016",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.14393.9234",
              "status": "affected",
              "version": "10.0.14393.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2016 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.14393.9234",
              "status": "affected",
              "version": "10.0.14393.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2019",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.17763.8880",
              "status": "affected",
              "version": "10.0.17763.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2019 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.17763.8880",
              "status": "affected",
              "version": "10.0.17763.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2022",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.20348.5256",
              "status": "affected",
              "version": "10.0.20348.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2025",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.26100.32995",
              "status": "affected",
              "version": "10.0.26100.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2025 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.26100.32995",
              "status": "affected",
              "version": "10.0.26100.0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x86:*",
                  "versionEndExcluding": "10.0.17763.8880",
                  "versionStartIncluding": "10.0.17763.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.17763.8880",
                  "versionStartIncluding": "10.0.17763.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.17763.8880",
                  "versionStartIncluding": "10.0.17763.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.20348.5256",
                  "versionStartIncluding": "10.0.20348.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_10_21H2:*:*:*:*:*:*:x86:*",
                  "versionEndExcluding": "10.0.19044.7417",
                  "versionStartIncluding": "10.0.19044.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_10_22H2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "10.0.19045.7417",
                  "versionStartIncluding": "10.0.19045.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.26100.32995",
                  "versionStartIncluding": "10.0.26100.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_11_25H2:*:*:*:*:*:*:arm64:*",
                  "versionEndExcluding": "10.0.26200.8655",
                  "versionStartIncluding": "10.0.26200.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_11_23H2:*:*:*:*:*:*:arm64:*",
                  "versionEndExcluding": "10.0.22631.7219",
                  "versionStartIncluding": "10.0.22631.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_11_23H2:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "10.0.22631.7219",
                  "versionStartIncluding": "10.0.22631.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_11_24H2:*:*:*:*:*:*:arm64:*",
                  "versionEndExcluding": "10.0.26100.8655",
                  "versionStartIncluding": "10.0.26100.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.26100.32995",
                  "versionStartIncluding": "10.0.26100.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_11_26H1:*:*:*:*:*:*:x64:*",
                  "versionEndExcluding": "10.0.28000.2269",
                  "versionStartIncluding": "10.0.28000.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x86:*",
                  "versionEndExcluding": "10.0.14393.9234",
                  "versionStartIncluding": "10.0.14393.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.14393.9234",
                  "versionStartIncluding": "10.0.14393.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "10.0.14393.9234",
                  "versionStartIncluding": "10.0.14393.0",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "datePublic": "2026-06-09T14:00:00.000Z",
      "descriptions": [
        {
          "lang": "en-US",
          "value": "Use after free in Windows Kernel allows an authorized attacker to elevate privileges locally."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C",
            "version": "3.1"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en-US",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-416",
              "description": "CWE-416: Use After Free",
              "lang": "en-US",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-07-08T23:23:32.653Z",
        "orgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8",
        "shortName": "microsoft"
      },
      "references": [
        {
          "name": "Windows Kernel Elevation of Privilege Vulnerability",
          "tags": [
            "vendor-advisory",
            "patch"
          ],
          "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-48583"
        }
      ],
      "title": "Windows Kernel Elevation of Privilege Vulnerability"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8",
    "assignerShortName": "microsoft",
    "cveId": "CVE-2026-48583",
    "datePublished": "2026-06-09T17:05:16.165Z",
    "dateReserved": "2026-05-21T20:00:35.246Z",
    "dateUpdated": "2026-07-08T23:23:32.653Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

CVE-2026-48913 (GCVE-0-2026-48913)

Vulnerability from cvelistv5 – Published: 2026-06-08 15:24 – Updated: 2026-06-08 22:32
VLAI
Title
Apache HTTP Server: mod_http2 memory corruption when file handles exhausted
Summary
Use After Free vulnerability in Apache HTTP Server module mod_http2 when file handles are already exhausted. This issue affects Apache HTTP Server: from 2.4.55 through 2.4.67.
Severity
7.3 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
Impacted products
Vendor Product Version
Apache Software Foundation Apache HTTP Server Affected: 2.4.55 , ≤ 2.4.67 (semver)
Create a notification for this product.
Credits
Sam Lovejoy, IBM X-Force Offensive Research (XOR)
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
              "availabilityImpact": "LOW",
              "baseScore": 7.3,
              "baseSeverity": "HIGH",
              "confidentialityImpact": "LOW",
              "integrityImpact": "LOW",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2026-48913",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-06-08T18:13:56.168385Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-06-08T18:14:24.141Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      },
      {
        "providerMetadata": {
          "dateUpdated": "2026-06-08T22:32:34.557Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "url": "http://www.openwall.com/lists/oss-security/2026/06/08/15"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Apache HTTP Server",
          "vendor": "Apache Software Foundation",
          "versions": [
            {
              "lessThanOrEqual": "2.4.67",
              "status": "affected",
              "version": "2.4.55",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Sam Lovejoy, IBM X-Force Offensive Research (XOR)"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "\u003cp\u003eUse After Free vulnerability in Apache HTTP Server module mod_http2 when file handles are already exhausted.\u003c/p\u003e\u003cp\u003eThis issue affects Apache HTTP Server: from 2.4.55 through 2.4.67.\u003c/p\u003e\u003cp\u003e\u003cbr\u003e\u003c/p\u003e"
            }
          ],
          "value": "Use After Free vulnerability in Apache HTTP Server module mod_http2 when file handles are already exhausted.\n\nThis issue affects Apache HTTP Server: from 2.4.55 through 2.4.67."
        }
      ],
      "metrics": [
        {
          "other": {
            "content": {
              "text": "low"
            },
            "type": "Textual description of severity"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-416",
              "description": "CWE-416 Use After Free",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-06-08T15:24:52.573Z",
        "orgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09",
        "shortName": "apache"
      },
      "references": [
        {
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://httpd.apache.org/security/vulnerabilities_24.html"
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "timeline": [
        {
          "lang": "en",
          "time": "2026-05-22T12:00:00.000Z",
          "value": "reported"
        },
        {
          "lang": "en",
          "time": "2026-06-03T12:00:00.000Z",
          "value": "fixed in 2.4.x by r1934882"
        },
        {
          "lang": "eng",
          "time": "2026-06-08T12:00:00.000Z",
          "value": "2.4.68 released"
        }
      ],
      "title": "Apache HTTP Server: mod_http2 memory corruption when file handles exhausted",
      "x_generator": {
        "engine": "Vulnogram 0.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09",
    "assignerShortName": "apache",
    "cveId": "CVE-2026-48913",
    "datePublished": "2026-06-08T15:24:52.573Z",
    "dateReserved": "2026-05-26T12:46:05.340Z",
    "dateUpdated": "2026-06-08T22:32:34.557Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

CVE-2026-49412 (GCVE-0-2026-49412)

Vulnerability from cvelistv5 – Published: 2026-06-27 09:02 – Updated: 2026-06-30 03:55
VLAI
Title
Use-after-free bug in the IPV6_MSFILTER socket option handler
Summary
The kernel handler for IPV6_MSFILTER dropped a serializing lock in order to copy the source-filter list from userspace, then reacquired the lock. During this window another thread could free the multicast filter structure, leaving the handler with a stale pointer to freed memory. An unprivileged local user can exploit this use-after-free to escalate privileges.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
Assigner
References
Impacted products
Vendor Product Version
FreeBSD FreeBSD Affected: 15.0-RELEASE , < p10 (release)
Affected: 14.4-RELEASE , < p6 (release)
Affected: 14.3-RELEASE , < p15 (release)
Create a notification for this product.
Date Public
2026-06-09 23:30
Credits
Andrew Griffiths at Calif.io Maik Münch
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "LOCAL",
              "availabilityImpact": "HIGH",
              "baseScore": 7.8,
              "baseSeverity": "HIGH",
              "confidentialityImpact": "HIGH",
              "integrityImpact": "HIGH",
              "privilegesRequired": "LOW",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2026-49412",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-06-29T00:00:00+00:00",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-06-30T03:55:29.049Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unknown",
          "modules": [
            "ip6_multicast"
          ],
          "product": "FreeBSD",
          "vendor": "FreeBSD",
          "versions": [
            {
              "lessThan": "p10",
              "status": "affected",
              "version": "15.0-RELEASE",
              "versionType": "release"
            },
            {
              "lessThan": "p6",
              "status": "affected",
              "version": "14.4-RELEASE",
              "versionType": "release"
            },
            {
              "lessThan": "p15",
              "status": "affected",
              "version": "14.3-RELEASE",
              "versionType": "release"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Andrew Griffiths at Calif.io"
        },
        {
          "lang": "en",
          "type": "finder",
          "value": "Maik M\u00fcnch"
        }
      ],
      "datePublic": "2026-06-09T23:30:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "The kernel handler for IPV6_MSFILTER dropped a serializing lock in order to copy the source-filter list from userspace, then reacquired the lock.  During this window another thread could free the multicast filter structure, leaving the handler with a stale pointer to freed memory.\n\nAn unprivileged local user can exploit this use-after-free to escalate privileges."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-416",
              "description": "CWE-416: Use After Free",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-06-27T09:02:55.482Z",
        "orgId": "63664ac6-956c-4cba-a5d0-f46076e16109",
        "shortName": "freebsd"
      },
      "references": [
        {
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://security.freebsd.org/advisories/FreeBSD-SA-26:29.ip6_multicast.asc"
        }
      ],
      "title": "Use-after-free bug in the IPV6_MSFILTER socket option handler",
      "x_generator": {
        "engine": "cvelib 1.8.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "63664ac6-956c-4cba-a5d0-f46076e16109",
    "assignerShortName": "freebsd",
    "cveId": "CVE-2026-49412",
    "datePublished": "2026-06-27T09:02:55.482Z",
    "dateReserved": "2026-05-29T20:24:28.615Z",
    "dateUpdated": "2026-06-30T03:55:29.049Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

CVE-2026-49417 (GCVE-0-2026-49417)

Vulnerability from cvelistv5 – Published: 2026-06-27 08:48 – Updated: 2026-06-30 03:55
VLAI
Title
Multiple vulnerabilities in the sound(4) mmap path
Summary
Second, the audio buffer backing a mapping could be freed when the device was closed even though the mapping remained valid. The freed memory could then be reused elsewhere while still accessible through the stale mapping. The /dev/dsp device nodes are world-accessible by default. On a system with an audio device, either issue allows an unprivileged local user to read and write kernel memory, which can be used to escalate privileges, potentially gaining full control of the affected system. At a minimum, an attacker can crash the kernel, resulting in a Denial of Service (DoS).
Severity
7 (High)
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
Assigner
References
Impacted products
Vendor Product Version
FreeBSD FreeBSD Affected: 15.0-RELEASE , < p10 (release)
Affected: 14.4-RELEASE , < p6 (release)
Affected: 14.3-RELEASE , < p15 (release)
Create a notification for this product.
Date Public
2026-06-09 23:30
Credits
Lexpl0it, 75Acol, Liyw979, Rob1n
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "HIGH",
              "attackVector": "LOCAL",
              "availabilityImpact": "HIGH",
              "baseScore": 7,
              "baseSeverity": "HIGH",
              "confidentialityImpact": "HIGH",
              "integrityImpact": "HIGH",
              "privilegesRequired": "LOW",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2026-49417",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-06-29T00:00:00+00:00",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-06-30T03:55:26.483Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unknown",
          "modules": [
            "sound"
          ],
          "product": "FreeBSD",
          "vendor": "FreeBSD",
          "versions": [
            {
              "lessThan": "p10",
              "status": "affected",
              "version": "15.0-RELEASE",
              "versionType": "release"
            },
            {
              "lessThan": "p6",
              "status": "affected",
              "version": "14.4-RELEASE",
              "versionType": "release"
            },
            {
              "lessThan": "p15",
              "status": "affected",
              "version": "14.3-RELEASE",
              "versionType": "release"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Lexpl0it, 75Acol, Liyw979, Rob1n"
        }
      ],
      "datePublic": "2026-06-09T23:30:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "Second, the audio buffer backing a mapping could be freed when the device was closed even though the mapping remained valid.  The freed memory could then be reused elsewhere while still accessible through the stale mapping.\n\nThe /dev/dsp device nodes are world-accessible by default.  On a system with an audio device, either issue allows an unprivileged local user to read and write kernel memory, which can be used to escalate privileges, potentially gaining full control of the affected system.  At a minimum, an attacker can crash the kernel, resulting in a Denial of Service (DoS)."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-416",
              "description": "CWE-416: Use After Free",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-06-27T08:48:30.991Z",
        "orgId": "63664ac6-956c-4cba-a5d0-f46076e16109",
        "shortName": "freebsd"
      },
      "references": [
        {
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://security.freebsd.org/advisories/FreeBSD-SA-26:27.sound.asc"
        }
      ],
      "title": "Multiple vulnerabilities in the sound(4) mmap path",
      "x_generator": {
        "engine": "cvelib 1.8.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "63664ac6-956c-4cba-a5d0-f46076e16109",
    "assignerShortName": "freebsd",
    "cveId": "CVE-2026-49417",
    "datePublished": "2026-06-27T08:48:30.991Z",
    "dateReserved": "2026-05-29T20:24:28.615Z",
    "dateUpdated": "2026-06-30T03:55:26.483Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

CVE-2026-49496 (GCVE-0-2026-49496)

Vulnerability from cvelistv5 – Published: 2026-06-10 12:37 – Updated: 2026-06-10 13:43 X_Open Source
VLAI
Title
Ghidra < 12.1 - Heap-Use-After-Free in SleighBuilder::generatePointerAdd via Vector Reallocation
Summary
Ghidra before 12.1 contains a heap-use-after-free vulnerability in SleighBuilder::generatePointerAdd caused by iterator invalidation when PcodeCacher::allocateInstruction reallocates the issued vector. Attackers can trigger memory corruption by decompiling malicious binaries through the public Sleigh::oneInstruction C++ API, affecting downstream SLEIGH library consumers.
Severity
6.9 (Medium)
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N
6.1 (Medium)
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H
SSVC
Exploitation: poc Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
Impacted products
Vendor Product Version
nationalsecurityagency ghidra Affected: 0 , < 12.1 (custom)
Unaffected: 12.1 (custom)
Create a notification for this product.
Date Public
2026-05-14 00:00
Credits
Stefano Bonicatti (@Smjert)
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-49496",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-06-10T13:42:47.898782Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-06-10T13:43:11.156Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "references": [
          {
            "tags": [
              "exploit"
            ],
            "url": "https://github.com/NationalSecurityAgency/ghidra/security/advisories/GHSA-gqh9-2c72-wpjc"
          }
        ],
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "ghidra",
          "repo": "https://github.com/nationalsecurityagency/ghidra",
          "vendor": "nationalsecurityagency",
          "versions": [
            {
              "lessThan": "12.1",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            },
            {
              "status": "unaffected",
              "version": "12.1",
              "versionType": "custom"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:a:nsa:ghidra:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "12.1",
                  "vulnerable": true
                }
              ],
              "operator": "OR"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "reporter",
          "value": "Stefano Bonicatti (@Smjert)"
        }
      ],
      "datePublic": "2026-05-14T00:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "Ghidra before 12.1 contains a heap-use-after-free vulnerability in SleighBuilder::generatePointerAdd caused by iterator invalidation when PcodeCacher::allocateInstruction reallocates the issued vector. Attackers can trigger memory corruption by decompiling malicious binaries through the public Sleigh::oneInstruction C++ API, affecting downstream SLEIGH library consumers."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "Automatable": "NOT_DEFINED",
            "Recovery": "NOT_DEFINED",
            "Safety": "NOT_DEFINED",
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "LOCAL",
            "baseScore": 6.9,
            "baseSeverity": "MEDIUM",
            "exploitMaturity": "NOT_DEFINED",
            "privilegesRequired": "NONE",
            "providerUrgency": "NOT_DEFINED",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "PASSIVE",
            "valueDensity": "NOT_DEFINED",
            "vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "HIGH",
            "vulnConfidentialityImpact": "NONE",
            "vulnIntegrityImpact": "LOW",
            "vulnerabilityResponseEffort": "NOT_DEFINED"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        },
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "HIGH",
            "baseScore": 6.1,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "LOW",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H",
            "version": "3.1"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-416",
              "description": "Use After Free",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-06-10T12:37:30.464Z",
        "orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
        "shortName": "VulnCheck"
      },
      "references": [
        {
          "name": "GitHub Security Advisory (GHSA-gqh9-2c72-wpjc)",
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://github.com/NationalSecurityAgency/ghidra/security/advisories/GHSA-gqh9-2c72-wpjc"
        },
        {
          "name": "Patch Commit",
          "tags": [
            "patch"
          ],
          "url": "https://github.com/NationalSecurityAgency/ghidra/commit/8a3018d5efcb07d2ec40bacdd6063cb6f01c8edf"
        },
        {
          "tags": [
            "third-party-advisory"
          ],
          "url": "https://www.vulncheck.com/advisories/ghidra-heap-use-after-free-in-sleighbuilder-generatepointeradd-via-vector-reallocation"
        }
      ],
      "tags": [
        "x_open-source"
      ],
      "title": "Ghidra \u003c 12.1 - Heap-Use-After-Free in SleighBuilder::generatePointerAdd via Vector Reallocation",
      "x_generator": {
        "engine": "vulncheck"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
    "assignerShortName": "VulnCheck",
    "cveId": "CVE-2026-49496",
    "datePublished": "2026-06-10T12:37:30.464Z",
    "dateReserved": "2026-05-31T11:54:34.993Z",
    "dateUpdated": "2026-06-10T13:43:11.156Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

CVE-2026-50219 (GCVE-0-2026-50219)

Vulnerability from cvelistv5 – Published: 2026-06-04 04:20 – Updated: 2026-06-04 12:36
VLAI
Summary
libexpat before 2.8.2 lacks handler call depth tracking for calls to XML_GetBuffer, XML_Parse, XML_ParseBuffer, XML_ParserFree, or XML_ParserReset from within handlers in cases of a policy violation. Thus, a use-after-free can occur,
Severity
4.9 (Medium)
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
Impacted products
Vendor Product Version
libexpat project libexpat Affected: 0 , < 2.8.2 (semver)
Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-50219",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-06-04T12:36:01.001143Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-06-04T12:36:14.744Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "libexpat",
          "vendor": "libexpat project",
          "versions": [
            {
              "lessThan": "2.8.2",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:a:libexpat_project:libexpat:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "2.8.2",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "libexpat before 2.8.2 lacks handler call depth tracking for calls to XML_GetBuffer, XML_Parse, XML_ParseBuffer, XML_ParserFree, or XML_ParserReset from within handlers in cases of a policy violation. Thus, a use-after-free can occur,"
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "HIGH",
            "attackVector": "LOCAL",
            "availabilityImpact": "LOW",
            "baseScore": 4.9,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "LOW",
            "integrityImpact": "LOW",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L",
            "version": "3.1"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-416",
              "description": "CWE-416 Use After Free",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-06-04T04:23:59.788Z",
        "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
        "shortName": "mitre"
      },
      "references": [
        {
          "url": "https://github.com/libexpat/libexpat/pull/1246"
        }
      ],
      "x_generator": {
        "engine": "CVE-Request-form 0.0.1"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
    "assignerShortName": "mitre",
    "cveId": "CVE-2026-50219",
    "datePublished": "2026-06-04T04:20:32.666Z",
    "dateReserved": "2026-06-04T04:20:31.953Z",
    "dateUpdated": "2026-06-04T12:36:14.744Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

CVE-2026-50257 (GCVE-0-2026-50257)

Vulnerability from cvelistv5 – Published: 2026-06-05 10:31 – Updated: 2026-07-13 12:05
VLAI
Title
Xorg-x11-server: xorg-x11-server-xwayland: xorg-x11-server: use-after-free in misyncdestroyfence()
Summary
A use-after-free flaw was found in the X.Org X server and Xwayland in miSyncDestroyFence(). A client that sets up multiple fence triggers can trigger a use-after-free function pointer call. An attacker would connect to the X server to set up a fence and await that fence, then a second X connection destroys the fence, causing the use-after-free. This may be used to crash the server, or for privilege escalation if the X server runs as root.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
Assigner
References
URL Tags
https://access.redhat.com/errata/RHSA-2026:26562 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:26566 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:26590 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:26610 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:26709 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:28923 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:29844 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:36083 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:36085 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:36086 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:36087 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:36632 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:36633 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:36634 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:36768 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:36791 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:36792 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:36798 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:38502 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:38810 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/security/cve/CVE-2026-50257 vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2485382 issue-trackingx_refsource_REDHAT
https://gitlab.freedesktop.org/xorg/xserver/-/com…
https://lists.x.org/archives/xorg-announce/2026-J…
https://redhat.atlassian.net/browse/PSIRTSUPT-16950
https://security.access.redhat.com/data/csaf/v2/v… x_sadp-csaf-vex
Impacted products
Vendor Product Version
Red Hat Red Hat Enterprise Linux 10 Unaffected: 0:24.1.9-4.el10_2.2 , < * (rpm)
    cpe:/o:redhat:enterprise_linux:10.2
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support Unaffected: 0:24.1.5-6.el10_0.1 , < * (rpm)
    cpe:/o:redhat:enterprise_linux_eus:10.0
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 7 Extended Lifecycle Support Unaffected: 0:1.20.4-35.el7_9 , < * (rpm)
    cpe:/o:redhat:rhel_els:7
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 8 Unaffected: 0:21.1.3-20.el8_10.2 , < * (rpm)
    cpe:/a:redhat:enterprise_linux:8::appstream
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 8 Unaffected: 0:1.20.11-28.el8_10.2 , < * (rpm)
    cpe:/a:redhat:enterprise_linux:8::appstream
    cpe:/a:redhat:enterprise_linux:8::crb
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 8 Unaffected: 0:1.15.0-10.el8_10 , < * (rpm)
    cpe:/a:redhat:enterprise_linux:8::appstream
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support Unaffected: 0:1.20.10-5.el8_4 , < * (rpm)
    cpe:/a:redhat:rhel_aus:8.4::appstream
    cpe:/a:redhat:rhel_eus_long_life:8.4::appstream
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On Unaffected: 0:1.20.10-5.el8_4 , < * (rpm)
    cpe:/a:redhat:rhel_aus:8.4::appstream
    cpe:/a:redhat:rhel_eus_long_life:8.4::appstream
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support Unaffected: 0:1.20.11-8.el8_6 , < * (rpm)
    cpe:/a:redhat:rhel_aus:8.6::appstream
    cpe:/a:redhat:rhel_eus_long_life:8.6::appstream
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support Unaffected: 0:21.1.3-2.el8_6.7 , < * (rpm)
    cpe:/a:redhat:rhel_aus:8.6::appstream
    cpe:/a:redhat:rhel_eus_long_life:8.6::appstream
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On Unaffected: 0:1.20.11-8.el8_6 , < * (rpm)
    cpe:/a:redhat:rhel_aus:8.6::appstream
    cpe:/a:redhat:rhel_eus_long_life:8.6::appstream
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On Unaffected: 0:21.1.3-2.el8_6.7 , < * (rpm)
    cpe:/a:redhat:rhel_aus:8.6::appstream
    cpe:/a:redhat:rhel_eus_long_life:8.6::appstream
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service Unaffected: 0:1.20.11-19.el8_8 , < * (rpm)
    cpe:/a:redhat:rhel_e4s:8.8::appstream
    cpe:/a:redhat:rhel_tus:8.8::appstream
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service Unaffected: 0:21.1.3-13.el8_8.1 , < * (rpm)
    cpe:/a:redhat:rhel_e4s:8.8::appstream
    cpe:/a:redhat:rhel_tus:8.8::appstream
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions Unaffected: 0:1.20.11-19.el8_8 , < * (rpm)
    cpe:/a:redhat:rhel_e4s:8.8::appstream
    cpe:/a:redhat:rhel_tus:8.8::appstream
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions Unaffected: 0:21.1.3-13.el8_8.1 , < * (rpm)
    cpe:/a:redhat:rhel_e4s:8.8::appstream
    cpe:/a:redhat:rhel_tus:8.8::appstream
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 9 Unaffected: 0:24.1.9-4.el9_8.2 , < * (rpm)
    cpe:/a:redhat:enterprise_linux:9::appstream
    cpe:/a:redhat:enterprise_linux:9::crb
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 9 Unaffected: 0:1.20.11-34.el9_8.2 , < * (rpm)
    cpe:/a:redhat:enterprise_linux:9::appstream
    cpe:/a:redhat:enterprise_linux:9::crb
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 9 Unaffected: 0:1.15.0-7.el9_8.2 , < * (rpm)
    cpe:/a:redhat:enterprise_linux:9::appstream
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions Unaffected: 0:1.20.11-21.el9_2 , < * (rpm)
    cpe:/a:redhat:rhel_e4s:9.2::appstream
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions Unaffected: 0:21.1.3-10.el9_2.1 , < * (rpm)
    cpe:/a:redhat:rhel_e4s:9.2::appstream
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions Unaffected: 0:1.20.11-29.el9_4 , < * (rpm)
    cpe:/a:redhat:rhel_e4s:9.4::appstream
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions Unaffected: 0:22.1.9-8.el9_4.1 , < * (rpm)
    cpe:/a:redhat:rhel_e4s:9.4::appstream
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support Unaffected: 0:1.20.11-34.el9_6 , < * (rpm)
    cpe:/a:redhat:rhel_eus:9.6::appstream
    cpe:/a:redhat:rhel_eus:9.6::crb
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support Unaffected: 0:23.2.7-6.el9_6.1 , < * (rpm)
    cpe:/a:redhat:rhel_eus:9.6::appstream
    cpe:/a:redhat:rhel_eus:9.6::crb
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 6     cpe:/o:redhat:enterprise_linux:6
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 7     cpe:/o:redhat:enterprise_linux:7
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux Server (v. 7 ELS)     cpe:/o:redhat:rhel_els:7
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux Server Optional (v. 7 ELS)     cpe:/o:redhat:rhel_els:7
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux AppStream EUS (v. 10.0)     cpe:/o:redhat:enterprise_linux_eus:10.0
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux AppStream (v. 10)     cpe:/o:redhat:enterprise_linux:10.2
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux AppStream (v. 8)     cpe:/a:redhat:enterprise_linux:8::appstream
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux AppStream AUS (v.8.4)     cpe:/a:redhat:rhel_aus:8.4::appstream
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4)     cpe:/a:redhat:rhel_eus_long_life:8.4::appstream
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux AppStream AUS (v.8.6)     cpe:/a:redhat:rhel_aus:8.6::appstream
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6)     cpe:/a:redhat:rhel_eus_long_life:8.6::appstream
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux AppStream E4S (v.8.8)     cpe:/a:redhat:rhel_e4s:8.8::appstream
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux AppStream TUS (v.8.8)     cpe:/a:redhat:rhel_tus:8.8::appstream
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux AppStream E4S (v.9.2)     cpe:/a:redhat:rhel_e4s:9.2::appstream
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux AppStream E4S (v.9.4)     cpe:/a:redhat:rhel_e4s:9.4::appstream
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux AppStream EUS (v.9.6)     cpe:/a:redhat:rhel_eus:9.6::appstream
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux AppStream (v. 9)     cpe:/a:redhat:enterprise_linux:9::appstream
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0)     cpe:/o:redhat:enterprise_linux_eus:10.0
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)     cpe:/o:redhat:enterprise_linux:10.2
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux CRB (v. 8)     cpe:/a:redhat:enterprise_linux:8::crb
 Create a notification for this product.
Red Hat Red Hat CodeReady Linux Builder EUS (v.9.6)     cpe:/a:redhat:rhel_eus:9.6::crb
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)     cpe:/a:redhat:enterprise_linux:9::crb
 Create a notification for this product.
Date Public
2026-06-02 00:00
Credits
Upstream acknowledges Anonymous (Trend Micro Zero Day Initiative) as the original reporter.
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-50257",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-06-09T00:00:00+00:00",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-06-10T03:58:53.470Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      },
      {
        "affected": [
          {
            "cpes": [
              "cpe:/o:redhat:rhel_els:7"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Enterprise Linux Server (v. 7 ELS)",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/o:redhat:rhel_els:7"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Enterprise Linux Server Optional (v. 7 ELS)",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/o:redhat:enterprise_linux_eus:10.0"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Enterprise Linux AppStream EUS (v. 10.0)",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/o:redhat:enterprise_linux:10.2"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Enterprise Linux AppStream (v. 10)",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:enterprise_linux:8::appstream"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Enterprise Linux AppStream (v. 8)",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:rhel_aus:8.4::appstream"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Enterprise Linux AppStream AUS (v.8.4)",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:rhel_eus_long_life:8.4::appstream"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4)",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:rhel_aus:8.6::appstream"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Enterprise Linux AppStream AUS (v.8.6)",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:rhel_eus_long_life:8.6::appstream"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6)",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:rhel_e4s:8.8::appstream"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Enterprise Linux AppStream E4S (v.8.8)",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:rhel_tus:8.8::appstream"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Enterprise Linux AppStream TUS (v.8.8)",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:rhel_e4s:9.2::appstream"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Enterprise Linux AppStream E4S (v.9.2)",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:rhel_e4s:9.4::appstream"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Enterprise Linux AppStream E4S (v.9.4)",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:rhel_eus:9.6::appstream"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Enterprise Linux AppStream EUS (v.9.6)",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:enterprise_linux:9::appstream"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Enterprise Linux AppStream (v. 9)",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/o:redhat:enterprise_linux_eus:10.0"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0)",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/o:redhat:enterprise_linux:10.2"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:enterprise_linux:8::crb"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Enterprise Linux CRB (v. 8)",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:rhel_eus:9.6::crb"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat CodeReady Linux Builder EUS (v.9.6)",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:enterprise_linux:9::crb"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/o:redhat:enterprise_linux:6"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Enterprise Linux 6",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/o:redhat:enterprise_linux:7"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Enterprise Linux 7",
            "vendor": "Red Hat"
          }
        ],
        "datePublic": "2026-06-02T00:00:00.000Z",
        "descriptions": [
          {
            "lang": "en",
            "value": "A use-after-free flaw was found in the X.Org X server and Xwayland in miSyncDestroyFence(). A client that sets up multiple fence triggers can trigger a use-after-free function pointer call. An attacker would connect to the X server to set up a fence and await that fence, then a second X connection destroys the fence, causing the use-after-free. This may be used to crash the server, or for privilege escalation if the X server runs as root."
          }
        ],
        "metrics": [
          {
            "other": {
              "content": {
                "namespace": "https://access.redhat.com/security/updates/classification/",
                "value": "Important"
              },
              "type": "Red Hat severity rating"
            }
          },
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "LOCAL",
              "availabilityImpact": "HIGH",
              "baseScore": 7.8,
              "baseSeverity": "HIGH",
              "confidentialityImpact": "HIGH",
              "integrityImpact": "HIGH",
              "privilegesRequired": "LOW",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
              "version": "3.1"
            },
            "format": "CVSS"
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "cweId": "CWE-416",
                "description": "Use After Free",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-07-13T12:05:02.006Z",
          "orgId": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c",
          "shortName": "redhat-SADP"
        },
        "references": [
          {
            "tags": [
              "vdb-entry",
              "x_refsource_REDHAT"
            ],
            "url": "https://access.redhat.com/security/cve/CVE-2026-50257"
          },
          {
            "name": "RHBZ#2485382",
            "tags": [
              "issue-tracking",
              "x_refsource_REDHAT"
            ],
            "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2485382"
          },
          {
            "tags": [
              "x_sadp-csaf-vex"
            ],
            "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-50257.json"
          },
          {
            "tags": [
              "vendor-advisory",
              "x_refsource_REDHAT"
            ],
            "url": "https://access.redhat.com/errata/RHSA-2026:36083"
          },
          {
            "tags": [
              "vendor-advisory",
              "x_refsource_REDHAT"
            ],
            "url": "https://access.redhat.com/errata/RHSA-2026:36798"
          },
          {
            "tags": [
              "vendor-advisory",
              "x_refsource_REDHAT"
            ],
            "url": "https://access.redhat.com/errata/RHSA-2026:26566"
          },
          {
            "tags": [
              "vendor-advisory",
              "x_refsource_REDHAT"
            ],
            "url": "https://access.redhat.com/errata/RHSA-2026:28923"
          },
          {
            "tags": [
              "vendor-advisory",
              "x_refsource_REDHAT"
            ],
            "url": "https://access.redhat.com/errata/RHSA-2026:26709"
          },
          {
            "tags": [
              "vendor-advisory",
              "x_refsource_REDHAT"
            ],
            "url": "https://access.redhat.com/errata/RHSA-2026:26562"
          },
          {
            "tags": [
              "vendor-advisory",
              "x_refsource_REDHAT"
            ],
            "url": "https://access.redhat.com/errata/RHSA-2026:36792"
          },
          {
            "tags": [
              "vendor-advisory",
              "x_refsource_REDHAT"
            ],
            "url": "https://access.redhat.com/errata/RHSA-2026:36791"
          },
          {
            "tags": [
              "vendor-advisory",
              "x_refsource_REDHAT"
            ],
            "url": "https://access.redhat.com/errata/RHSA-2026:38810"
          },
          {
            "tags": [
              "vendor-advisory",
              "x_refsource_REDHAT"
            ],
            "url": "https://access.redhat.com/errata/RHSA-2026:36768"
          },
          {
            "tags": [
              "vendor-advisory",
              "x_refsource_REDHAT"
            ],
            "url": "https://access.redhat.com/errata/RHSA-2026:38502"
          },
          {
            "tags": [
              "vendor-advisory",
              "x_refsource_REDHAT"
            ],
            "url": "https://access.redhat.com/errata/RHSA-2026:36086"
          },
          {
            "tags": [
              "vendor-advisory",
              "x_refsource_REDHAT"
            ],
            "url": "https://access.redhat.com/errata/RHSA-2026:36633"
          },
          {
            "tags": [
              "vendor-advisory",
              "x_refsource_REDHAT"
            ],
            "url": "https://access.redhat.com/errata/RHSA-2026:36087"
          },
          {
            "tags": [
              "vendor-advisory",
              "x_refsource_REDHAT"
            ],
            "url": "https://access.redhat.com/errata/RHSA-2026:36632"
          },
          {
            "tags": [
              "vendor-advisory",
              "x_refsource_REDHAT"
            ],
            "url": "https://access.redhat.com/errata/RHSA-2026:36085"
          },
          {
            "tags": [
              "vendor-advisory",
              "x_refsource_REDHAT"
            ],
            "url": "https://access.redhat.com/errata/RHSA-2026:36634"
          },
          {
            "tags": [
              "vendor-advisory",
              "x_refsource_REDHAT"
            ],
            "url": "https://access.redhat.com/errata/RHSA-2026:29844"
          },
          {
            "tags": [
              "vendor-advisory",
              "x_refsource_REDHAT"
            ],
            "url": "https://access.redhat.com/errata/RHSA-2026:26610"
          },
          {
            "tags": [
              "vendor-advisory",
              "x_refsource_REDHAT"
            ],
            "url": "https://access.redhat.com/errata/RHSA-2026:26590"
          }
        ],
        "solutions": [
          {
            "lang": "en",
            "value": "RHSA-2026:36083: Red Hat Enterprise Linux Server (v. 7 ELS), Red Hat Enterprise Linux Server Optional (v. 7 ELS)"
          },
          {
            "lang": "en",
            "value": "RHSA-2026:36798: Red Hat Enterprise Linux AppStream EUS (v. 10.0), Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0)"
          },
          {
            "lang": "en",
            "value": "RHSA-2026:26566: Red Hat Enterprise Linux AppStream (v. 10), Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)"
          },
          {
            "lang": "en",
            "value": "RHSA-2026:28923: Red Hat Enterprise Linux AppStream (v. 8)"
          },
          {
            "lang": "en",
            "value": "RHSA-2026:26709: Red Hat Enterprise Linux AppStream (v. 8), Red Hat Enterprise Linux CRB (v. 8)"
          },
          {
            "lang": "en",
            "value": "RHSA-2026:26562: Red Hat Enterprise Linux AppStream (v. 8)"
          },
          {
            "lang": "en",
            "value": "RHSA-2026:36792: Red Hat Enterprise Linux AppStream AUS (v.8.4), Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4)"
          },
          {
            "lang": "en",
            "value": "RHSA-2026:36791: Red Hat Enterprise Linux AppStream AUS (v.8.6), Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6)"
          },
          {
            "lang": "en",
            "value": "RHSA-2026:38810: Red Hat Enterprise Linux AppStream AUS (v.8.6), Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6)"
          },
          {
            "lang": "en",
            "value": "RHSA-2026:36768: Red Hat Enterprise Linux AppStream E4S (v.8.8), Red Hat Enterprise Linux AppStream TUS (v.8.8)"
          },
          {
            "lang": "en",
            "value": "RHSA-2026:38502: Red Hat Enterprise Linux AppStream E4S (v.8.8), Red Hat Enterprise Linux AppStream TUS (v.8.8)"
          },
          {
            "lang": "en",
            "value": "RHSA-2026:36086: Red Hat Enterprise Linux AppStream E4S (v.9.2)"
          },
          {
            "lang": "en",
            "value": "RHSA-2026:36633: Red Hat Enterprise Linux AppStream E4S (v.9.2)"
          },
          {
            "lang": "en",
            "value": "RHSA-2026:36087: Red Hat Enterprise Linux AppStream E4S (v.9.4)"
          },
          {
            "lang": "en",
            "value": "RHSA-2026:36632: Red Hat Enterprise Linux AppStream E4S (v.9.4)"
          },
          {
            "lang": "en",
            "value": "RHSA-2026:36085: Red Hat CodeReady Linux Builder EUS (v.9.6), Red Hat Enterprise Linux AppStream EUS (v.9.6)"
          },
          {
            "lang": "en",
            "value": "RHSA-2026:36634: Red Hat CodeReady Linux Builder EUS (v.9.6), Red Hat Enterprise Linux AppStream EUS (v.9.6)"
          },
          {
            "lang": "en",
            "value": "RHSA-2026:29844: Red Hat Enterprise Linux AppStream (v. 9)"
          },
          {
            "lang": "en",
            "value": "RHSA-2026:26610: Red Hat Enterprise Linux AppStream (v. 9), Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)"
          },
          {
            "lang": "en",
            "value": "RHSA-2026:26590: Red Hat Enterprise Linux AppStream (v. 9), Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)"
          }
        ],
        "timeline": [
          {
            "lang": "en",
            "time": "2026-05-15T03:14:46.000Z",
            "value": "Reported to Red Hat."
          },
          {
            "lang": "en",
            "time": "2026-06-02T00:00:00.000Z",
            "value": "Made public."
          }
        ],
        "title": "xorg-x11-server: xorg-x11-server-Xwayland: xorg-x11-server: use-after-free in miSyncDestroyFence()",
        "x_adpType": "supplier",
        "x_generator": {
          "engine": "sadp-cli 1.0.0"
        }
      }
    ],
    "cna": {
      "affected": [
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/o:redhat:enterprise_linux:10.2"
          ],
          "defaultStatus": "affected",
          "packageName": "xorg-x11-server-Xwayland",
          "product": "Red Hat Enterprise Linux 10",
          "vendor": "Red Hat",
          "versions": [
            {
              "lessThan": "*",
              "status": "unaffected",
              "version": "0:24.1.9-4.el10_2.2",
              "versionType": "rpm"
            }
          ]
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/o:redhat:enterprise_linux_eus:10.0"
          ],
          "defaultStatus": "affected",
          "packageName": "xorg-x11-server-Xwayland",
          "product": "Red Hat Enterprise Linux 10.0 Extended Update Support",
          "vendor": "Red Hat",
          "versions": [
            {
              "lessThan": "*",
              "status": "unaffected",
              "version": "0:24.1.5-6.el10_0.1",
              "versionType": "rpm"
            }
          ]
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/o:redhat:rhel_els:7"
          ],
          "defaultStatus": "affected",
          "packageName": "xorg-x11-server",
          "product": "Red Hat Enterprise Linux 7 Extended Lifecycle Support",
          "vendor": "Red Hat",
          "versions": [
            {
              "lessThan": "*",
              "status": "unaffected",
              "version": "0:1.20.4-35.el7_9",
              "versionType": "rpm"
            }
          ]
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/a:redhat:enterprise_linux:8::appstream"
          ],
          "defaultStatus": "affected",
          "packageName": "xorg-x11-server-Xwayland",
          "product": "Red Hat Enterprise Linux 8",
          "vendor": "Red Hat",
          "versions": [
            {
              "lessThan": "*",
              "status": "unaffected",
              "version": "0:21.1.3-20.el8_10.2",
              "versionType": "rpm"
            }
          ]
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/a:redhat:enterprise_linux:8::appstream",
            "cpe:/a:redhat:enterprise_linux:8::crb"
          ],
          "defaultStatus": "affected",
          "packageName": "xorg-x11-server",
          "product": "Red Hat Enterprise Linux 8",
          "vendor": "Red Hat",
          "versions": [
            {
              "lessThan": "*",
              "status": "unaffected",
              "version": "0:1.20.11-28.el8_10.2",
              "versionType": "rpm"
            }
          ]
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/a:redhat:enterprise_linux:8::appstream"
          ],
          "defaultStatus": "affected",
          "packageName": "tigervnc",
          "product": "Red Hat Enterprise Linux 8",
          "vendor": "Red Hat",
          "versions": [
            {
              "lessThan": "*",
              "status": "unaffected",
              "version": "0:1.15.0-10.el8_10",
              "versionType": "rpm"
            }
          ]
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/a:redhat:rhel_aus:8.4::appstream",
            "cpe:/a:redhat:rhel_eus_long_life:8.4::appstream"
          ],
          "defaultStatus": "affected",
          "packageName": "xorg-x11-server",
          "product": "Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support",
          "vendor": "Red Hat",
          "versions": [
            {
              "lessThan": "*",
              "status": "unaffected",
              "version": "0:1.20.10-5.el8_4",
              "versionType": "rpm"
            }
          ]
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/a:redhat:rhel_aus:8.4::appstream",
            "cpe:/a:redhat:rhel_eus_long_life:8.4::appstream"
          ],
          "defaultStatus": "affected",
          "packageName": "xorg-x11-server",
          "product": "Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On",
          "vendor": "Red Hat",
          "versions": [
            {
              "lessThan": "*",
              "status": "unaffected",
              "version": "0:1.20.10-5.el8_4",
              "versionType": "rpm"
            }
          ]
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/a:redhat:rhel_aus:8.6::appstream",
            "cpe:/a:redhat:rhel_eus_long_life:8.6::appstream"
          ],
          "defaultStatus": "affected",
          "packageName": "xorg-x11-server",
          "product": "Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support",
          "vendor": "Red Hat",
          "versions": [
            {
              "lessThan": "*",
              "status": "unaffected",
              "version": "0:1.20.11-8.el8_6",
              "versionType": "rpm"
            }
          ]
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/a:redhat:rhel_aus:8.6::appstream",
            "cpe:/a:redhat:rhel_eus_long_life:8.6::appstream"
          ],
          "defaultStatus": "affected",
          "packageName": "xorg-x11-server-Xwayland",
          "product": "Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support",
          "vendor": "Red Hat",
          "versions": [
            {
              "lessThan": "*",
              "status": "unaffected",
              "version": "0:21.1.3-2.el8_6.7",
              "versionType": "rpm"
            }
          ]
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/a:redhat:rhel_aus:8.6::appstream",
            "cpe:/a:redhat:rhel_eus_long_life:8.6::appstream"
          ],
          "defaultStatus": "affected",
          "packageName": "xorg-x11-server",
          "product": "Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On",
          "vendor": "Red Hat",
          "versions": [
            {
              "lessThan": "*",
              "status": "unaffected",
              "version": "0:1.20.11-8.el8_6",
              "versionType": "rpm"
            }
          ]
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/a:redhat:rhel_aus:8.6::appstream",
            "cpe:/a:redhat:rhel_eus_long_life:8.6::appstream"
          ],
          "defaultStatus": "affected",
          "packageName": "xorg-x11-server-Xwayland",
          "product": "Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On",
          "vendor": "Red Hat",
          "versions": [
            {
              "lessThan": "*",
              "status": "unaffected",
              "version": "0:21.1.3-2.el8_6.7",
              "versionType": "rpm"
            }
          ]
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/a:redhat:rhel_e4s:8.8::appstream",
            "cpe:/a:redhat:rhel_tus:8.8::appstream"
          ],
          "defaultStatus": "affected",
          "packageName": "xorg-x11-server",
          "product": "Red Hat Enterprise Linux 8.8 Telecommunications Update Service",
          "vendor": "Red Hat",
          "versions": [
            {
              "lessThan": "*",
              "status": "unaffected",
              "version": "0:1.20.11-19.el8_8",
              "versionType": "rpm"
            }
          ]
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/a:redhat:rhel_e4s:8.8::appstream",
            "cpe:/a:redhat:rhel_tus:8.8::appstream"
          ],
          "defaultStatus": "affected",
          "packageName": "xorg-x11-server-Xwayland",
          "product": "Red Hat Enterprise Linux 8.8 Telecommunications Update Service",
          "vendor": "Red Hat",
          "versions": [
            {
              "lessThan": "*",
              "status": "unaffected",
              "version": "0:21.1.3-13.el8_8.1",
              "versionType": "rpm"
            }
          ]
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/a:redhat:rhel_e4s:8.8::appstream",
            "cpe:/a:redhat:rhel_tus:8.8::appstream"
          ],
          "defaultStatus": "affected",
          "packageName": "xorg-x11-server",
          "product": "Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions",
          "vendor": "Red Hat",
          "versions": [
            {
              "lessThan": "*",
              "status": "unaffected",
              "version": "0:1.20.11-19.el8_8",
              "versionType": "rpm"
            }
          ]
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/a:redhat:rhel_e4s:8.8::appstream",
            "cpe:/a:redhat:rhel_tus:8.8::appstream"
          ],
          "defaultStatus": "affected",
          "packageName": "xorg-x11-server-Xwayland",
          "product": "Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions",
          "vendor": "Red Hat",
          "versions": [
            {
              "lessThan": "*",
              "status": "unaffected",
              "version": "0:21.1.3-13.el8_8.1",
              "versionType": "rpm"
            }
          ]
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/a:redhat:enterprise_linux:9::appstream",
            "cpe:/a:redhat:enterprise_linux:9::crb"
          ],
          "defaultStatus": "affected",
          "packageName": "xorg-x11-server-Xwayland",
          "product": "Red Hat Enterprise Linux 9",
          "vendor": "Red Hat",
          "versions": [
            {
              "lessThan": "*",
              "status": "unaffected",
              "version": "0:24.1.9-4.el9_8.2",
              "versionType": "rpm"
            }
          ]
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/a:redhat:enterprise_linux:9::appstream",
            "cpe:/a:redhat:enterprise_linux:9::crb"
          ],
          "defaultStatus": "affected",
          "packageName": "xorg-x11-server",
          "product": "Red Hat Enterprise Linux 9",
          "vendor": "Red Hat",
          "versions": [
            {
              "lessThan": "*",
              "status": "unaffected",
              "version": "0:1.20.11-34.el9_8.2",
              "versionType": "rpm"
            }
          ]
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/a:redhat:enterprise_linux:9::appstream"
          ],
          "defaultStatus": "affected",
          "packageName": "tigervnc",
          "product": "Red Hat Enterprise Linux 9",
          "vendor": "Red Hat",
          "versions": [
            {
              "lessThan": "*",
              "status": "unaffected",
              "version": "0:1.15.0-7.el9_8.2",
              "versionType": "rpm"
            }
          ]
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/a:redhat:rhel_e4s:9.2::appstream"
          ],
          "defaultStatus": "affected",
          "packageName": "xorg-x11-server",
          "product": "Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions",
          "vendor": "Red Hat",
          "versions": [
            {
              "lessThan": "*",
              "status": "unaffected",
              "version": "0:1.20.11-21.el9_2",
              "versionType": "rpm"
            }
          ]
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/a:redhat:rhel_e4s:9.2::appstream"
          ],
          "defaultStatus": "affected",
          "packageName": "xorg-x11-server-Xwayland",
          "product": "Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions",
          "vendor": "Red Hat",
          "versions": [
            {
              "lessThan": "*",
              "status": "unaffected",
              "version": "0:21.1.3-10.el9_2.1",
              "versionType": "rpm"
            }
          ]
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/a:redhat:rhel_e4s:9.4::appstream"
          ],
          "defaultStatus": "affected",
          "packageName": "xorg-x11-server",
          "product": "Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions",
          "vendor": "Red Hat",
          "versions": [
            {
              "lessThan": "*",
              "status": "unaffected",
              "version": "0:1.20.11-29.el9_4",
              "versionType": "rpm"
            }
          ]
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/a:redhat:rhel_e4s:9.4::appstream"
          ],
          "defaultStatus": "affected",
          "packageName": "xorg-x11-server-Xwayland",
          "product": "Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions",
          "vendor": "Red Hat",
          "versions": [
            {
              "lessThan": "*",
              "status": "unaffected",
              "version": "0:22.1.9-8.el9_4.1",
              "versionType": "rpm"
            }
          ]
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/a:redhat:rhel_eus:9.6::appstream",
            "cpe:/a:redhat:rhel_eus:9.6::crb"
          ],
          "defaultStatus": "affected",
          "packageName": "xorg-x11-server",
          "product": "Red Hat Enterprise Linux 9.6 Extended Update Support",
          "vendor": "Red Hat",
          "versions": [
            {
              "lessThan": "*",
              "status": "unaffected",
              "version": "0:1.20.11-34.el9_6",
              "versionType": "rpm"
            }
          ]
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/a:redhat:rhel_eus:9.6::appstream",
            "cpe:/a:redhat:rhel_eus:9.6::crb"
          ],
          "defaultStatus": "affected",
          "packageName": "xorg-x11-server-Xwayland",
          "product": "Red Hat Enterprise Linux 9.6 Extended Update Support",
          "vendor": "Red Hat",
          "versions": [
            {
              "lessThan": "*",
              "status": "unaffected",
              "version": "0:23.2.7-6.el9_6.1",
              "versionType": "rpm"
            }
          ]
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/o:redhat:enterprise_linux:6"
          ],
          "defaultStatus": "affected",
          "packageName": "tigervnc",
          "product": "Red Hat Enterprise Linux 6",
          "vendor": "Red Hat"
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/o:redhat:enterprise_linux:6"
          ],
          "defaultStatus": "unknown",
          "packageName": "xorg-x11-server",
          "product": "Red Hat Enterprise Linux 6",
          "vendor": "Red Hat"
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/o:redhat:enterprise_linux:7"
          ],
          "defaultStatus": "affected",
          "packageName": "tigervnc",
          "product": "Red Hat Enterprise Linux 7",
          "vendor": "Red Hat"
        }
      ],
      "credits": [
        {
          "lang": "en",
          "value": "Upstream acknowledges Anonymous (Trend Micro Zero Day Initiative) as the original reporter."
        }
      ],
      "datePublic": "2026-06-02T00:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "A use-after-free flaw was found in the X.Org X server and Xwayland in miSyncDestroyFence(). A client that sets up multiple fence triggers can trigger a use-after-free function pointer call. An attacker would connect to the X server to set up a fence and await that fence, then a second X connection destroys the fence, causing the use-after-free. This may be used to crash the server, or for privilege escalation if the X server runs as root."
        }
      ],
      "metrics": [
        {
          "other": {
            "content": {
              "namespace": "https://access.redhat.com/security/updates/classification/",
              "value": "Important"
            },
            "type": "Red Hat severity rating"
          }
        },
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "HIGH",
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "format": "CVSS"
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-416",
              "description": "Use After Free",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-07-13T10:54:45.133Z",
        "orgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
        "shortName": "redhat"
      },
      "references": [
        {
          "name": "RHSA-2026:26562",
          "tags": [
            "vendor-advisory",
            "x_refsource_REDHAT"
          ],
          "url": "https://access.redhat.com/errata/RHSA-2026:26562"
        },
        {
          "name": "RHSA-2026:26566",
          "tags": [
            "vendor-advisory",
            "x_refsource_REDHAT"
          ],
          "url": "https://access.redhat.com/errata/RHSA-2026:26566"
        },
        {
          "name": "RHSA-2026:26590",
          "tags": [
            "vendor-advisory",
            "x_refsource_REDHAT"
          ],
          "url": "https://access.redhat.com/errata/RHSA-2026:26590"
        },
        {
          "name": "RHSA-2026:26610",
          "tags": [
            "vendor-advisory",
            "x_refsource_REDHAT"
          ],
          "url": "https://access.redhat.com/errata/RHSA-2026:26610"
        },
        {
          "name": "RHSA-2026:26709",
          "tags": [
            "vendor-advisory",
            "x_refsource_REDHAT"
          ],
          "url": "https://access.redhat.com/errata/RHSA-2026:26709"
        },
        {
          "name": "RHSA-2026:28923",
          "tags": [
            "vendor-advisory",
            "x_refsource_REDHAT"
          ],
          "url": "https://access.redhat.com/errata/RHSA-2026:28923"
        },
        {
          "name": "RHSA-2026:29844",
          "tags": [
            "vendor-advisory",
            "x_refsource_REDHAT"
          ],
          "url": "https://access.redhat.com/errata/RHSA-2026:29844"
        },
        {
          "name": "RHSA-2026:36083",
          "tags": [
            "vendor-advisory",
            "x_refsource_REDHAT"
          ],
          "url": "https://access.redhat.com/errata/RHSA-2026:36083"
        },
        {
          "name": "RHSA-2026:36085",
          "tags": [
            "vendor-advisory",
            "x_refsource_REDHAT"
          ],
          "url": "https://access.redhat.com/errata/RHSA-2026:36085"
        },
        {
          "name": "RHSA-2026:36086",
          "tags": [
            "vendor-advisory",
            "x_refsource_REDHAT"
          ],
          "url": "https://access.redhat.com/errata/RHSA-2026:36086"
        },
        {
          "name": "RHSA-2026:36087",
          "tags": [
            "vendor-advisory",
            "x_refsource_REDHAT"
          ],
          "url": "https://access.redhat.com/errata/RHSA-2026:36087"
        },
        {
          "name": "RHSA-2026:36632",
          "tags": [
            "vendor-advisory",
            "x_refsource_REDHAT"
          ],
          "url": "https://access.redhat.com/errata/RHSA-2026:36632"
        },
        {
          "name": "RHSA-2026:36633",
          "tags": [
            "vendor-advisory",
            "x_refsource_REDHAT"
          ],
          "url": "https://access.redhat.com/errata/RHSA-2026:36633"
        },
        {
          "name": "RHSA-2026:36634",
          "tags": [
            "vendor-advisory",
            "x_refsource_REDHAT"
          ],
          "url": "https://access.redhat.com/errata/RHSA-2026:36634"
        },
        {
          "name": "RHSA-2026:36768",
          "tags": [
            "vendor-advisory",
            "x_refsource_REDHAT"
          ],
          "url": "https://access.redhat.com/errata/RHSA-2026:36768"
        },
        {
          "name": "RHSA-2026:36791",
          "tags": [
            "vendor-advisory",
            "x_refsource_REDHAT"
          ],
          "url": "https://access.redhat.com/errata/RHSA-2026:36791"
        },
        {
          "name": "RHSA-2026:36792",
          "tags": [
            "vendor-advisory",
            "x_refsource_REDHAT"
          ],
          "url": "https://access.redhat.com/errata/RHSA-2026:36792"
        },
        {
          "name": "RHSA-2026:36798",
          "tags": [
            "vendor-advisory",
            "x_refsource_REDHAT"
          ],
          "url": "https://access.redhat.com/errata/RHSA-2026:36798"
        },
        {
          "name": "RHSA-2026:38502",
          "tags": [
            "vendor-advisory",
            "x_refsource_REDHAT"
          ],
          "url": "https://access.redhat.com/errata/RHSA-2026:38502"
        },
        {
          "name": "RHSA-2026:38810",
          "tags": [
            "vendor-advisory",
            "x_refsource_REDHAT"
          ],
          "url": "https://access.redhat.com/errata/RHSA-2026:38810"
        },
        {
          "tags": [
            "vdb-entry",
            "x_refsource_REDHAT"
          ],
          "url": "https://access.redhat.com/security/cve/CVE-2026-50257"
        },
        {
          "name": "RHBZ#2485382",
          "tags": [
            "issue-tracking",
            "x_refsource_REDHAT"
          ],
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2485382"
        },
        {
          "url": "https://gitlab.freedesktop.org/xorg/xserver/-/commit/f5abfb61994471023d8c6470428c8e30c411cc0b"
        },
        {
          "url": "https://lists.x.org/archives/xorg-announce/2026-June/003702.html"
        },
        {
          "url": "https://redhat.atlassian.net/browse/PSIRTSUPT-16950"
        }
      ],
      "timeline": [
        {
          "lang": "en",
          "time": "2026-05-15T03:14:46.000Z",
          "value": "Reported to Red Hat."
        },
        {
          "lang": "en",
          "time": "2026-06-02T00:00:00.000Z",
          "value": "Made public."
        }
      ],
      "title": "Xorg-x11-server: xorg-x11-server-xwayland: xorg-x11-server: use-after-free in misyncdestroyfence()",
      "x_generator": {
        "engine": "cvelib 1.8.0"
      },
      "x_redhatCweChain": "CWE-416: Use After Free"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
    "assignerShortName": "redhat",
    "cveId": "CVE-2026-50257",
    "datePublished": "2026-06-05T10:31:22.052Z",
    "dateReserved": "2026-06-04T14:55:24.011Z",
    "dateUpdated": "2026-07-13T12:05:02.006Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

CVE-2026-50260 (GCVE-0-2026-50260)

Vulnerability from cvelistv5 – Published: 2026-06-05 10:36 – Updated: 2026-07-13 12:05
VLAI
Title
Xorg-x11-server: xorg-x11-server-xwayland: xorg-x11-server: use-after-free in freecounter()
Summary
A use-after-free flaw was found in the X.Org X server and Xwayland in FreeCounter(). A client that sets up multiple SyncCounters and awaits on those triggers can trigger a use-after-free when destroying those counters via a second client connection. This may be used to crash the server, or for privilege escalation if the X server runs as root.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
Assigner
References
URL Tags
https://access.redhat.com/errata/RHSA-2026:26562 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:26566 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:26590 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:26610 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:26709 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:28923 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:29844 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:36083 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:36085 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:36086 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:36087 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:36632 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:36633 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:36634 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:36768 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:36791 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:36792 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:36798 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:38502 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:38810 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/security/cve/CVE-2026-50260 vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2485385 issue-trackingx_refsource_REDHAT
https://gitlab.freedesktop.org/xorg/xserver/-/com…
https://lists.x.org/archives/xorg-announce/2026-J…
https://redhat.atlassian.net/browse/PSIRTSUPT-16950
https://security.access.redhat.com/data/csaf/v2/v… x_sadp-csaf-vex
Impacted products
Vendor Product Version
Red Hat Red Hat Enterprise Linux 10 Unaffected: 0:24.1.9-4.el10_2.2 , < * (rpm)
    cpe:/o:redhat:enterprise_linux:10.2
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support Unaffected: 0:24.1.5-6.el10_0.1 , < * (rpm)
    cpe:/o:redhat:enterprise_linux_eus:10.0
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 7 Extended Lifecycle Support Unaffected: 0:1.20.4-35.el7_9 , < * (rpm)
    cpe:/o:redhat:rhel_els:7
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 8 Unaffected: 0:21.1.3-20.el8_10.2 , < * (rpm)
    cpe:/a:redhat:enterprise_linux:8::appstream
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 8 Unaffected: 0:1.20.11-28.el8_10.2 , < * (rpm)
    cpe:/a:redhat:enterprise_linux:8::appstream
    cpe:/a:redhat:enterprise_linux:8::crb
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 8 Unaffected: 0:1.15.0-10.el8_10 , < * (rpm)
    cpe:/a:redhat:enterprise_linux:8::appstream
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support Unaffected: 0:1.20.10-5.el8_4 , < * (rpm)
    cpe:/a:redhat:rhel_aus:8.4::appstream
    cpe:/a:redhat:rhel_eus_long_life:8.4::appstream
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On Unaffected: 0:1.20.10-5.el8_4 , < * (rpm)
    cpe:/a:redhat:rhel_aus:8.4::appstream
    cpe:/a:redhat:rhel_eus_long_life:8.4::appstream
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support Unaffected: 0:1.20.11-8.el8_6 , < * (rpm)
    cpe:/a:redhat:rhel_aus:8.6::appstream
    cpe:/a:redhat:rhel_eus_long_life:8.6::appstream
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support Unaffected: 0:21.1.3-2.el8_6.7 , < * (rpm)
    cpe:/a:redhat:rhel_aus:8.6::appstream
    cpe:/a:redhat:rhel_eus_long_life:8.6::appstream
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On Unaffected: 0:1.20.11-8.el8_6 , < * (rpm)
    cpe:/a:redhat:rhel_aus:8.6::appstream
    cpe:/a:redhat:rhel_eus_long_life:8.6::appstream
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On Unaffected: 0:21.1.3-2.el8_6.7 , < * (rpm)
    cpe:/a:redhat:rhel_aus:8.6::appstream
    cpe:/a:redhat:rhel_eus_long_life:8.6::appstream
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service Unaffected: 0:1.20.11-19.el8_8 , < * (rpm)
    cpe:/a:redhat:rhel_e4s:8.8::appstream
    cpe:/a:redhat:rhel_tus:8.8::appstream
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service Unaffected: 0:21.1.3-13.el8_8.1 , < * (rpm)
    cpe:/a:redhat:rhel_e4s:8.8::appstream
    cpe:/a:redhat:rhel_tus:8.8::appstream
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions Unaffected: 0:1.20.11-19.el8_8 , < * (rpm)
    cpe:/a:redhat:rhel_e4s:8.8::appstream
    cpe:/a:redhat:rhel_tus:8.8::appstream
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions Unaffected: 0:21.1.3-13.el8_8.1 , < * (rpm)
    cpe:/a:redhat:rhel_e4s:8.8::appstream
    cpe:/a:redhat:rhel_tus:8.8::appstream
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 9 Unaffected: 0:24.1.9-4.el9_8.2 , < * (rpm)
    cpe:/a:redhat:enterprise_linux:9::appstream
    cpe:/a:redhat:enterprise_linux:9::crb
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 9 Unaffected: 0:1.20.11-34.el9_8.2 , < * (rpm)
    cpe:/a:redhat:enterprise_linux:9::appstream
    cpe:/a:redhat:enterprise_linux:9::crb
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 9 Unaffected: 0:1.15.0-7.el9_8.2 , < * (rpm)
    cpe:/a:redhat:enterprise_linux:9::appstream
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions Unaffected: 0:1.20.11-21.el9_2 , < * (rpm)
    cpe:/a:redhat:rhel_e4s:9.2::appstream
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions Unaffected: 0:21.1.3-10.el9_2.1 , < * (rpm)
    cpe:/a:redhat:rhel_e4s:9.2::appstream
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions Unaffected: 0:1.20.11-29.el9_4 , < * (rpm)
    cpe:/a:redhat:rhel_e4s:9.4::appstream
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions Unaffected: 0:22.1.9-8.el9_4.1 , < * (rpm)
    cpe:/a:redhat:rhel_e4s:9.4::appstream
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support Unaffected: 0:1.20.11-34.el9_6 , < * (rpm)
    cpe:/a:redhat:rhel_eus:9.6::appstream
    cpe:/a:redhat:rhel_eus:9.6::crb
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support Unaffected: 0:23.2.7-6.el9_6.1 , < * (rpm)
    cpe:/a:redhat:rhel_eus:9.6::appstream
    cpe:/a:redhat:rhel_eus:9.6::crb
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 6     cpe:/o:redhat:enterprise_linux:6
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 7     cpe:/o:redhat:enterprise_linux:7
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux Server (v. 7 ELS)     cpe:/o:redhat:rhel_els:7
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux Server Optional (v. 7 ELS)     cpe:/o:redhat:rhel_els:7
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux AppStream EUS (v. 10.0)     cpe:/o:redhat:enterprise_linux_eus:10.0
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux AppStream (v. 10)     cpe:/o:redhat:enterprise_linux:10.2
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux AppStream (v. 8)     cpe:/a:redhat:enterprise_linux:8::appstream
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux AppStream AUS (v.8.4)     cpe:/a:redhat:rhel_aus:8.4::appstream
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4)     cpe:/a:redhat:rhel_eus_long_life:8.4::appstream
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux AppStream AUS (v.8.6)     cpe:/a:redhat:rhel_aus:8.6::appstream
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6)     cpe:/a:redhat:rhel_eus_long_life:8.6::appstream
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux AppStream E4S (v.8.8)     cpe:/a:redhat:rhel_e4s:8.8::appstream
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux AppStream TUS (v.8.8)     cpe:/a:redhat:rhel_tus:8.8::appstream
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux AppStream E4S (v.9.2)     cpe:/a:redhat:rhel_e4s:9.2::appstream
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux AppStream E4S (v.9.4)     cpe:/a:redhat:rhel_e4s:9.4::appstream
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux AppStream EUS (v.9.6)     cpe:/a:redhat:rhel_eus:9.6::appstream
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux AppStream (v. 9)     cpe:/a:redhat:enterprise_linux:9::appstream
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0)     cpe:/o:redhat:enterprise_linux_eus:10.0
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)     cpe:/o:redhat:enterprise_linux:10.2
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux CRB (v. 8)     cpe:/a:redhat:enterprise_linux:8::crb
 Create a notification for this product.
Red Hat Red Hat CodeReady Linux Builder EUS (v.9.6)     cpe:/a:redhat:rhel_eus:9.6::crb
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)     cpe:/a:redhat:enterprise_linux:9::crb
 Create a notification for this product.
Date Public
2026-06-02 00:00
Credits
Upstream acknowledges Anonymous (Trend Micro Zero Day Initiative) as the original reporter.
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-50260",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-06-09T00:00:00+00:00",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-06-10T03:58:48.992Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      },
      {
        "affected": [
          {
            "cpes": [
              "cpe:/o:redhat:rhel_els:7"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Enterprise Linux Server (v. 7 ELS)",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/o:redhat:rhel_els:7"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Enterprise Linux Server Optional (v. 7 ELS)",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/o:redhat:enterprise_linux_eus:10.0"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Enterprise Linux AppStream EUS (v. 10.0)",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/o:redhat:enterprise_linux:10.2"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Enterprise Linux AppStream (v. 10)",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:enterprise_linux:8::appstream"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Enterprise Linux AppStream (v. 8)",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:rhel_aus:8.4::appstream"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Enterprise Linux AppStream AUS (v.8.4)",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:rhel_eus_long_life:8.4::appstream"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4)",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:rhel_aus:8.6::appstream"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Enterprise Linux AppStream AUS (v.8.6)",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:rhel_eus_long_life:8.6::appstream"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6)",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:rhel_e4s:8.8::appstream"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Enterprise Linux AppStream E4S (v.8.8)",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:rhel_tus:8.8::appstream"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Enterprise Linux AppStream TUS (v.8.8)",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:rhel_e4s:9.2::appstream"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Enterprise Linux AppStream E4S (v.9.2)",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:rhel_e4s:9.4::appstream"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Enterprise Linux AppStream E4S (v.9.4)",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:rhel_eus:9.6::appstream"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Enterprise Linux AppStream EUS (v.9.6)",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:enterprise_linux:9::appstream"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Enterprise Linux AppStream (v. 9)",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/o:redhat:enterprise_linux_eus:10.0"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0)",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/o:redhat:enterprise_linux:10.2"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:enterprise_linux:8::crb"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Enterprise Linux CRB (v. 8)",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:rhel_eus:9.6::crb"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat CodeReady Linux Builder EUS (v.9.6)",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:enterprise_linux:9::crb"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/o:redhat:enterprise_linux:6"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Enterprise Linux 6",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/o:redhat:enterprise_linux:7"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Enterprise Linux 7",
            "vendor": "Red Hat"
          }
        ],
        "datePublic": "2026-06-02T00:00:00.000Z",
        "descriptions": [
          {
            "lang": "en",
            "value": "A use-after-free flaw was found in the X.Org X server and Xwayland in FreeCounter(). A client that sets up multiple SyncCounters and awaits on those triggers can trigger a use-after-free when destroying those counters via a second client connection. This may be used to crash the server, or for privilege escalation if the X server runs as root."
          }
        ],
        "metrics": [
          {
            "other": {
              "content": {
                "namespace": "https://access.redhat.com/security/updates/classification/",
                "value": "Important"
              },
              "type": "Red Hat severity rating"
            }
          },
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "LOCAL",
              "availabilityImpact": "HIGH",
              "baseScore": 7.8,
              "baseSeverity": "HIGH",
              "confidentialityImpact": "HIGH",
              "integrityImpact": "HIGH",
              "privilegesRequired": "LOW",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
              "version": "3.1"
            },
            "format": "CVSS"
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "cweId": "CWE-416",
                "description": "Use After Free",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-07-13T12:05:01.095Z",
          "orgId": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c",
          "shortName": "redhat-SADP"
        },
        "references": [
          {
            "tags": [
              "vdb-entry",
              "x_refsource_REDHAT"
            ],
            "url": "https://access.redhat.com/security/cve/CVE-2026-50260"
          },
          {
            "name": "RHBZ#2485385",
            "tags": [
              "issue-tracking",
              "x_refsource_REDHAT"
            ],
            "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2485385"
          },
          {
            "tags": [
              "x_sadp-csaf-vex"
            ],
            "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-50260.json"
          },
          {
            "tags": [
              "vendor-advisory",
              "x_refsource_REDHAT"
            ],
            "url": "https://access.redhat.com/errata/RHSA-2026:36083"
          },
          {
            "tags": [
              "vendor-advisory",
              "x_refsource_REDHAT"
            ],
            "url": "https://access.redhat.com/errata/RHSA-2026:36798"
          },
          {
            "tags": [
              "vendor-advisory",
              "x_refsource_REDHAT"
            ],
            "url": "https://access.redhat.com/errata/RHSA-2026:26566"
          },
          {
            "tags": [
              "vendor-advisory",
              "x_refsource_REDHAT"
            ],
            "url": "https://access.redhat.com/errata/RHSA-2026:28923"
          },
          {
            "tags": [
              "vendor-advisory",
              "x_refsource_REDHAT"
            ],
            "url": "https://access.redhat.com/errata/RHSA-2026:26709"
          },
          {
            "tags": [
              "vendor-advisory",
              "x_refsource_REDHAT"
            ],
            "url": "https://access.redhat.com/errata/RHSA-2026:26562"
          },
          {
            "tags": [
              "vendor-advisory",
              "x_refsource_REDHAT"
            ],
            "url": "https://access.redhat.com/errata/RHSA-2026:36792"
          },
          {
            "tags": [
              "vendor-advisory",
              "x_refsource_REDHAT"
            ],
            "url": "https://access.redhat.com/errata/RHSA-2026:36791"
          },
          {
            "tags": [
              "vendor-advisory",
              "x_refsource_REDHAT"
            ],
            "url": "https://access.redhat.com/errata/RHSA-2026:38810"
          },
          {
            "tags": [
              "vendor-advisory",
              "x_refsource_REDHAT"
            ],
            "url": "https://access.redhat.com/errata/RHSA-2026:36768"
          },
          {
            "tags": [
              "vendor-advisory",
              "x_refsource_REDHAT"
            ],
            "url": "https://access.redhat.com/errata/RHSA-2026:38502"
          },
          {
            "tags": [
              "vendor-advisory",
              "x_refsource_REDHAT"
            ],
            "url": "https://access.redhat.com/errata/RHSA-2026:36086"
          },
          {
            "tags": [
              "vendor-advisory",
              "x_refsource_REDHAT"
            ],
            "url": "https://access.redhat.com/errata/RHSA-2026:36633"
          },
          {
            "tags": [
              "vendor-advisory",
              "x_refsource_REDHAT"
            ],
            "url": "https://access.redhat.com/errata/RHSA-2026:36087"
          },
          {
            "tags": [
              "vendor-advisory",
              "x_refsource_REDHAT"
            ],
            "url": "https://access.redhat.com/errata/RHSA-2026:36632"
          },
          {
            "tags": [
              "vendor-advisory",
              "x_refsource_REDHAT"
            ],
            "url": "https://access.redhat.com/errata/RHSA-2026:36085"
          },
          {
            "tags": [
              "vendor-advisory",
              "x_refsource_REDHAT"
            ],
            "url": "https://access.redhat.com/errata/RHSA-2026:36634"
          },
          {
            "tags": [
              "vendor-advisory",
              "x_refsource_REDHAT"
            ],
            "url": "https://access.redhat.com/errata/RHSA-2026:29844"
          },
          {
            "tags": [
              "vendor-advisory",
              "x_refsource_REDHAT"
            ],
            "url": "https://access.redhat.com/errata/RHSA-2026:26610"
          },
          {
            "tags": [
              "vendor-advisory",
              "x_refsource_REDHAT"
            ],
            "url": "https://access.redhat.com/errata/RHSA-2026:26590"
          }
        ],
        "solutions": [
          {
            "lang": "en",
            "value": "RHSA-2026:36083: Red Hat Enterprise Linux Server (v. 7 ELS), Red Hat Enterprise Linux Server Optional (v. 7 ELS)"
          },
          {
            "lang": "en",
            "value": "RHSA-2026:36798: Red Hat Enterprise Linux AppStream EUS (v. 10.0), Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0)"
          },
          {
            "lang": "en",
            "value": "RHSA-2026:26566: Red Hat Enterprise Linux AppStream (v. 10), Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)"
          },
          {
            "lang": "en",
            "value": "RHSA-2026:28923: Red Hat Enterprise Linux AppStream (v. 8)"
          },
          {
            "lang": "en",
            "value": "RHSA-2026:26709: Red Hat Enterprise Linux AppStream (v. 8), Red Hat Enterprise Linux CRB (v. 8)"
          },
          {
            "lang": "en",
            "value": "RHSA-2026:26562: Red Hat Enterprise Linux AppStream (v. 8)"
          },
          {
            "lang": "en",
            "value": "RHSA-2026:36792: Red Hat Enterprise Linux AppStream AUS (v.8.4), Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4)"
          },
          {
            "lang": "en",
            "value": "RHSA-2026:36791: Red Hat Enterprise Linux AppStream AUS (v.8.6), Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6)"
          },
          {
            "lang": "en",
            "value": "RHSA-2026:38810: Red Hat Enterprise Linux AppStream AUS (v.8.6), Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6)"
          },
          {
            "lang": "en",
            "value": "RHSA-2026:36768: Red Hat Enterprise Linux AppStream E4S (v.8.8), Red Hat Enterprise Linux AppStream TUS (v.8.8)"
          },
          {
            "lang": "en",
            "value": "RHSA-2026:38502: Red Hat Enterprise Linux AppStream E4S (v.8.8), Red Hat Enterprise Linux AppStream TUS (v.8.8)"
          },
          {
            "lang": "en",
            "value": "RHSA-2026:36086: Red Hat Enterprise Linux AppStream E4S (v.9.2)"
          },
          {
            "lang": "en",
            "value": "RHSA-2026:36633: Red Hat Enterprise Linux AppStream E4S (v.9.2)"
          },
          {
            "lang": "en",
            "value": "RHSA-2026:36087: Red Hat Enterprise Linux AppStream E4S (v.9.4)"
          },
          {
            "lang": "en",
            "value": "RHSA-2026:36632: Red Hat Enterprise Linux AppStream E4S (v.9.4)"
          },
          {
            "lang": "en",
            "value": "RHSA-2026:36085: Red Hat CodeReady Linux Builder EUS (v.9.6), Red Hat Enterprise Linux AppStream EUS (v.9.6)"
          },
          {
            "lang": "en",
            "value": "RHSA-2026:36634: Red Hat CodeReady Linux Builder EUS (v.9.6), Red Hat Enterprise Linux AppStream EUS (v.9.6)"
          },
          {
            "lang": "en",
            "value": "RHSA-2026:29844: Red Hat Enterprise Linux AppStream (v. 9)"
          },
          {
            "lang": "en",
            "value": "RHSA-2026:26610: Red Hat Enterprise Linux AppStream (v. 9), Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)"
          },
          {
            "lang": "en",
            "value": "RHSA-2026:26590: Red Hat Enterprise Linux AppStream (v. 9), Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)"
          }
        ],
        "timeline": [
          {
            "lang": "en",
            "time": "2026-05-15T03:14:46.000Z",
            "value": "Reported to Red Hat."
          },
          {
            "lang": "en",
            "time": "2026-06-02T00:00:00.000Z",
            "value": "Made public."
          }
        ],
        "title": "xorg-x11-server: xorg-x11-server-Xwayland: xorg-x11-server: use-after-free in FreeCounter()",
        "x_adpType": "supplier",
        "x_generator": {
          "engine": "sadp-cli 1.0.0"
        }
      }
    ],
    "cna": {
      "affected": [
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/o:redhat:enterprise_linux:10.2"
          ],
          "defaultStatus": "affected",
          "packageName": "xorg-x11-server-Xwayland",
          "product": "Red Hat Enterprise Linux 10",
          "vendor": "Red Hat",
          "versions": [
            {
              "lessThan": "*",
              "status": "unaffected",
              "version": "0:24.1.9-4.el10_2.2",
              "versionType": "rpm"
            }
          ]
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/o:redhat:enterprise_linux_eus:10.0"
          ],
          "defaultStatus": "affected",
          "packageName": "xorg-x11-server-Xwayland",
          "product": "Red Hat Enterprise Linux 10.0 Extended Update Support",
          "vendor": "Red Hat",
          "versions": [
            {
              "lessThan": "*",
              "status": "unaffected",
              "version": "0:24.1.5-6.el10_0.1",
              "versionType": "rpm"
            }
          ]
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/o:redhat:rhel_els:7"
          ],
          "defaultStatus": "affected",
          "packageName": "xorg-x11-server",
          "product": "Red Hat Enterprise Linux 7 Extended Lifecycle Support",
          "vendor": "Red Hat",
          "versions": [
            {
              "lessThan": "*",
              "status": "unaffected",
              "version": "0:1.20.4-35.el7_9",
              "versionType": "rpm"
            }
          ]
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/a:redhat:enterprise_linux:8::appstream"
          ],
          "defaultStatus": "affected",
          "packageName": "xorg-x11-server-Xwayland",
          "product": "Red Hat Enterprise Linux 8",
          "vendor": "Red Hat",
          "versions": [
            {
              "lessThan": "*",
              "status": "unaffected",
              "version": "0:21.1.3-20.el8_10.2",
              "versionType": "rpm"
            }
          ]
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/a:redhat:enterprise_linux:8::appstream",
            "cpe:/a:redhat:enterprise_linux:8::crb"
          ],
          "defaultStatus": "affected",
          "packageName": "xorg-x11-server",
          "product": "Red Hat Enterprise Linux 8",
          "vendor": "Red Hat",
          "versions": [
            {
              "lessThan": "*",
              "status": "unaffected",
              "version": "0:1.20.11-28.el8_10.2",
              "versionType": "rpm"
            }
          ]
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/a:redhat:enterprise_linux:8::appstream"
          ],
          "defaultStatus": "affected",
          "packageName": "tigervnc",
          "product": "Red Hat Enterprise Linux 8",
          "vendor": "Red Hat",
          "versions": [
            {
              "lessThan": "*",
              "status": "unaffected",
              "version": "0:1.15.0-10.el8_10",
              "versionType": "rpm"
            }
          ]
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/a:redhat:rhel_aus:8.4::appstream",
            "cpe:/a:redhat:rhel_eus_long_life:8.4::appstream"
          ],
          "defaultStatus": "affected",
          "packageName": "xorg-x11-server",
          "product": "Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support",
          "vendor": "Red Hat",
          "versions": [
            {
              "lessThan": "*",
              "status": "unaffected",
              "version": "0:1.20.10-5.el8_4",
              "versionType": "rpm"
            }
          ]
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/a:redhat:rhel_aus:8.4::appstream",
            "cpe:/a:redhat:rhel_eus_long_life:8.4::appstream"
          ],
          "defaultStatus": "affected",
          "packageName": "xorg-x11-server",
          "product": "Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On",
          "vendor": "Red Hat",
          "versions": [
            {
              "lessThan": "*",
              "status": "unaffected",
              "version": "0:1.20.10-5.el8_4",
              "versionType": "rpm"
            }
          ]
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/a:redhat:rhel_aus:8.6::appstream",
            "cpe:/a:redhat:rhel_eus_long_life:8.6::appstream"
          ],
          "defaultStatus": "affected",
          "packageName": "xorg-x11-server",
          "product": "Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support",
          "vendor": "Red Hat",
          "versions": [
            {
              "lessThan": "*",
              "status": "unaffected",
              "version": "0:1.20.11-8.el8_6",
              "versionType": "rpm"
            }
          ]
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/a:redhat:rhel_aus:8.6::appstream",
            "cpe:/a:redhat:rhel_eus_long_life:8.6::appstream"
          ],
          "defaultStatus": "affected",
          "packageName": "xorg-x11-server-Xwayland",
          "product": "Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support",
          "vendor": "Red Hat",
          "versions": [
            {
              "lessThan": "*",
              "status": "unaffected",
              "version": "0:21.1.3-2.el8_6.7",
              "versionType": "rpm"
            }
          ]
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/a:redhat:rhel_aus:8.6::appstream",
            "cpe:/a:redhat:rhel_eus_long_life:8.6::appstream"
          ],
          "defaultStatus": "affected",
          "packageName": "xorg-x11-server",
          "product": "Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On",
          "vendor": "Red Hat",
          "versions": [
            {
              "lessThan": "*",
              "status": "unaffected",
              "version": "0:1.20.11-8.el8_6",
              "versionType": "rpm"
            }
          ]
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/a:redhat:rhel_aus:8.6::appstream",
            "cpe:/a:redhat:rhel_eus_long_life:8.6::appstream"
          ],
          "defaultStatus": "affected",
          "packageName": "xorg-x11-server-Xwayland",
          "product": "Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On",
          "vendor": "Red Hat",
          "versions": [
            {
              "lessThan": "*",
              "status": "unaffected",
              "version": "0:21.1.3-2.el8_6.7",
              "versionType": "rpm"
            }
          ]
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/a:redhat:rhel_e4s:8.8::appstream",
            "cpe:/a:redhat:rhel_tus:8.8::appstream"
          ],
          "defaultStatus": "affected",
          "packageName": "xorg-x11-server",
          "product": "Red Hat Enterprise Linux 8.8 Telecommunications Update Service",
          "vendor": "Red Hat",
          "versions": [
            {
              "lessThan": "*",
              "status": "unaffected",
              "version": "0:1.20.11-19.el8_8",
              "versionType": "rpm"
            }
          ]
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/a:redhat:rhel_e4s:8.8::appstream",
            "cpe:/a:redhat:rhel_tus:8.8::appstream"
          ],
          "defaultStatus": "affected",
          "packageName": "xorg-x11-server-Xwayland",
          "product": "Red Hat Enterprise Linux 8.8 Telecommunications Update Service",
          "vendor": "Red Hat",
          "versions": [
            {
              "lessThan": "*",
              "status": "unaffected",
              "version": "0:21.1.3-13.el8_8.1",
              "versionType": "rpm"
            }
          ]
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/a:redhat:rhel_e4s:8.8::appstream",
            "cpe:/a:redhat:rhel_tus:8.8::appstream"
          ],
          "defaultStatus": "affected",
          "packageName": "xorg-x11-server",
          "product": "Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions",
          "vendor": "Red Hat",
          "versions": [
            {
              "lessThan": "*",
              "status": "unaffected",
              "version": "0:1.20.11-19.el8_8",
              "versionType": "rpm"
            }
          ]
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/a:redhat:rhel_e4s:8.8::appstream",
            "cpe:/a:redhat:rhel_tus:8.8::appstream"
          ],
          "defaultStatus": "affected",
          "packageName": "xorg-x11-server-Xwayland",
          "product": "Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions",
          "vendor": "Red Hat",
          "versions": [
            {
              "lessThan": "*",
              "status": "unaffected",
              "version": "0:21.1.3-13.el8_8.1",
              "versionType": "rpm"
            }
          ]
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/a:redhat:enterprise_linux:9::appstream",
            "cpe:/a:redhat:enterprise_linux:9::crb"
          ],
          "defaultStatus": "affected",
          "packageName": "xorg-x11-server-Xwayland",
          "product": "Red Hat Enterprise Linux 9",
          "vendor": "Red Hat",
          "versions": [
            {
              "lessThan": "*",
              "status": "unaffected",
              "version": "0:24.1.9-4.el9_8.2",
              "versionType": "rpm"
            }
          ]
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/a:redhat:enterprise_linux:9::appstream",
            "cpe:/a:redhat:enterprise_linux:9::crb"
          ],
          "defaultStatus": "affected",
          "packageName": "xorg-x11-server",
          "product": "Red Hat Enterprise Linux 9",
          "vendor": "Red Hat",
          "versions": [
            {
              "lessThan": "*",
              "status": "unaffected",
              "version": "0:1.20.11-34.el9_8.2",
              "versionType": "rpm"
            }
          ]
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/a:redhat:enterprise_linux:9::appstream"
          ],
          "defaultStatus": "affected",
          "packageName": "tigervnc",
          "product": "Red Hat Enterprise Linux 9",
          "vendor": "Red Hat",
          "versions": [
            {
              "lessThan": "*",
              "status": "unaffected",
              "version": "0:1.15.0-7.el9_8.2",
              "versionType": "rpm"
            }
          ]
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/a:redhat:rhel_e4s:9.2::appstream"
          ],
          "defaultStatus": "affected",
          "packageName": "xorg-x11-server",
          "product": "Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions",
          "vendor": "Red Hat",
          "versions": [
            {
              "lessThan": "*",
              "status": "unaffected",
              "version": "0:1.20.11-21.el9_2",
              "versionType": "rpm"
            }
          ]
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/a:redhat:rhel_e4s:9.2::appstream"
          ],
          "defaultStatus": "affected",
          "packageName": "xorg-x11-server-Xwayland",
          "product": "Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions",
          "vendor": "Red Hat",
          "versions": [
            {
              "lessThan": "*",
              "status": "unaffected",
              "version": "0:21.1.3-10.el9_2.1",
              "versionType": "rpm"
            }
          ]
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/a:redhat:rhel_e4s:9.4::appstream"
          ],
          "defaultStatus": "affected",
          "packageName": "xorg-x11-server",
          "product": "Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions",
          "vendor": "Red Hat",
          "versions": [
            {
              "lessThan": "*",
              "status": "unaffected",
              "version": "0:1.20.11-29.el9_4",
              "versionType": "rpm"
            }
          ]
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/a:redhat:rhel_e4s:9.4::appstream"
          ],
          "defaultStatus": "affected",
          "packageName": "xorg-x11-server-Xwayland",
          "product": "Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions",
          "vendor": "Red Hat",
          "versions": [
            {
              "lessThan": "*",
              "status": "unaffected",
              "version": "0:22.1.9-8.el9_4.1",
              "versionType": "rpm"
            }
          ]
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/a:redhat:rhel_eus:9.6::appstream",
            "cpe:/a:redhat:rhel_eus:9.6::crb"
          ],
          "defaultStatus": "affected",
          "packageName": "xorg-x11-server",
          "product": "Red Hat Enterprise Linux 9.6 Extended Update Support",
          "vendor": "Red Hat",
          "versions": [
            {
              "lessThan": "*",
              "status": "unaffected",
              "version": "0:1.20.11-34.el9_6",
              "versionType": "rpm"
            }
          ]
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/a:redhat:rhel_eus:9.6::appstream",
            "cpe:/a:redhat:rhel_eus:9.6::crb"
          ],
          "defaultStatus": "affected",
          "packageName": "xorg-x11-server-Xwayland",
          "product": "Red Hat Enterprise Linux 9.6 Extended Update Support",
          "vendor": "Red Hat",
          "versions": [
            {
              "lessThan": "*",
              "status": "unaffected",
              "version": "0:23.2.7-6.el9_6.1",
              "versionType": "rpm"
            }
          ]
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/o:redhat:enterprise_linux:6"
          ],
          "defaultStatus": "affected",
          "packageName": "tigervnc",
          "product": "Red Hat Enterprise Linux 6",
          "vendor": "Red Hat"
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/o:redhat:enterprise_linux:6"
          ],
          "defaultStatus": "unknown",
          "packageName": "xorg-x11-server",
          "product": "Red Hat Enterprise Linux 6",
          "vendor": "Red Hat"
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/o:redhat:enterprise_linux:7"
          ],
          "defaultStatus": "affected",
          "packageName": "tigervnc",
          "product": "Red Hat Enterprise Linux 7",
          "vendor": "Red Hat"
        }
      ],
      "credits": [
        {
          "lang": "en",
          "value": "Upstream acknowledges Anonymous (Trend Micro Zero Day Initiative) as the original reporter."
        }
      ],
      "datePublic": "2026-06-02T00:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "A use-after-free flaw was found in the X.Org X server and Xwayland in FreeCounter(). A client that sets up multiple SyncCounters and awaits on those triggers can trigger a use-after-free when destroying those counters via a second client connection. This may be used to crash the server, or for privilege escalation if the X server runs as root."
        }
      ],
      "metrics": [
        {
          "other": {
            "content": {
              "namespace": "https://access.redhat.com/security/updates/classification/",
              "value": "Important"
            },
            "type": "Red Hat severity rating"
          }
        },
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "HIGH",
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "format": "CVSS"
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-416",
              "description": "Use After Free",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-07-13T10:55:08.651Z",
        "orgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
        "shortName": "redhat"
      },
      "references": [
        {
          "name": "RHSA-2026:26562",
          "tags": [
            "vendor-advisory",
            "x_refsource_REDHAT"
          ],
          "url": "https://access.redhat.com/errata/RHSA-2026:26562"
        },
        {
          "name": "RHSA-2026:26566",
          "tags": [
            "vendor-advisory",
            "x_refsource_REDHAT"
          ],
          "url": "https://access.redhat.com/errata/RHSA-2026:26566"
        },
        {
          "name": "RHSA-2026:26590",
          "tags": [
            "vendor-advisory",
            "x_refsource_REDHAT"
          ],
          "url": "https://access.redhat.com/errata/RHSA-2026:26590"
        },
        {
          "name": "RHSA-2026:26610",
          "tags": [
            "vendor-advisory",
            "x_refsource_REDHAT"
          ],
          "url": "https://access.redhat.com/errata/RHSA-2026:26610"
        },
        {
          "name": "RHSA-2026:26709",
          "tags": [
            "vendor-advisory",
            "x_refsource_REDHAT"
          ],
          "url": "https://access.redhat.com/errata/RHSA-2026:26709"
        },
        {
          "name": "RHSA-2026:28923",
          "tags": [
            "vendor-advisory",
            "x_refsource_REDHAT"
          ],
          "url": "https://access.redhat.com/errata/RHSA-2026:28923"
        },
        {
          "name": "RHSA-2026:29844",
          "tags": [
            "vendor-advisory",
            "x_refsource_REDHAT"
          ],
          "url": "https://access.redhat.com/errata/RHSA-2026:29844"
        },
        {
          "name": "RHSA-2026:36083",
          "tags": [
            "vendor-advisory",
            "x_refsource_REDHAT"
          ],
          "url": "https://access.redhat.com/errata/RHSA-2026:36083"
        },
        {
          "name": "RHSA-2026:36085",
          "tags": [
            "vendor-advisory",
            "x_refsource_REDHAT"
          ],
          "url": "https://access.redhat.com/errata/RHSA-2026:36085"
        },
        {
          "name": "RHSA-2026:36086",
          "tags": [
            "vendor-advisory",
            "x_refsource_REDHAT"
          ],
          "url": "https://access.redhat.com/errata/RHSA-2026:36086"
        },
        {
          "name": "RHSA-2026:36087",
          "tags": [
            "vendor-advisory",
            "x_refsource_REDHAT"
          ],
          "url": "https://access.redhat.com/errata/RHSA-2026:36087"
        },
        {
          "name": "RHSA-2026:36632",
          "tags": [
            "vendor-advisory",
            "x_refsource_REDHAT"
          ],
          "url": "https://access.redhat.com/errata/RHSA-2026:36632"
        },
        {
          "name": "RHSA-2026:36633",
          "tags": [
            "vendor-advisory",
            "x_refsource_REDHAT"
          ],
          "url": "https://access.redhat.com/errata/RHSA-2026:36633"
        },
        {
          "name": "RHSA-2026:36634",
          "tags": [
            "vendor-advisory",
            "x_refsource_REDHAT"
          ],
          "url": "https://access.redhat.com/errata/RHSA-2026:36634"
        },
        {
          "name": "RHSA-2026:36768",
          "tags": [
            "vendor-advisory",
            "x_refsource_REDHAT"
          ],
          "url": "https://access.redhat.com/errata/RHSA-2026:36768"
        },
        {
          "name": "RHSA-2026:36791",
          "tags": [
            "vendor-advisory",
            "x_refsource_REDHAT"
          ],
          "url": "https://access.redhat.com/errata/RHSA-2026:36791"
        },
        {
          "name": "RHSA-2026:36792",
          "tags": [
            "vendor-advisory",
            "x_refsource_REDHAT"
          ],
          "url": "https://access.redhat.com/errata/RHSA-2026:36792"
        },
        {
          "name": "RHSA-2026:36798",
          "tags": [
            "vendor-advisory",
            "x_refsource_REDHAT"
          ],
          "url": "https://access.redhat.com/errata/RHSA-2026:36798"
        },
        {
          "name": "RHSA-2026:38502",
          "tags": [
            "vendor-advisory",
            "x_refsource_REDHAT"
          ],
          "url": "https://access.redhat.com/errata/RHSA-2026:38502"
        },
        {
          "name": "RHSA-2026:38810",
          "tags": [
            "vendor-advisory",
            "x_refsource_REDHAT"
          ],
          "url": "https://access.redhat.com/errata/RHSA-2026:38810"
        },
        {
          "tags": [
            "vdb-entry",
            "x_refsource_REDHAT"
          ],
          "url": "https://access.redhat.com/security/cve/CVE-2026-50260"
        },
        {
          "name": "RHBZ#2485385",
          "tags": [
            "issue-tracking",
            "x_refsource_REDHAT"
          ],
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2485385"
        },
        {
          "url": "https://gitlab.freedesktop.org/xorg/xserver/-/commit/f5abfb61994471023d8c6470428c8e30c411cc0b"
        },
        {
          "url": "https://lists.x.org/archives/xorg-announce/2026-June/003702.html"
        },
        {
          "url": "https://redhat.atlassian.net/browse/PSIRTSUPT-16950"
        }
      ],
      "timeline": [
        {
          "lang": "en",
          "time": "2026-05-15T03:14:46.000Z",
          "value": "Reported to Red Hat."
        },
        {
          "lang": "en",
          "time": "2026-06-02T00:00:00.000Z",
          "value": "Made public."
        }
      ],
      "title": "Xorg-x11-server: xorg-x11-server-xwayland: xorg-x11-server: use-after-free in freecounter()",
      "x_generator": {
        "engine": "cvelib 1.8.0"
      },
      "x_redhatCweChain": "CWE-416: Use After Free"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
    "assignerShortName": "redhat",
    "cveId": "CVE-2026-50260",
    "datePublished": "2026-06-05T10:36:30.319Z",
    "dateReserved": "2026-06-04T14:55:24.011Z",
    "dateUpdated": "2026-07-13T12:05:01.095Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

CVE-2026-50261 (GCVE-0-2026-50261)

Vulnerability from cvelistv5 – Published: 2026-06-05 10:36 – Updated: 2026-07-13 12:05
VLAI
Title
Xorg-x11-server: xorg-x11-server-xwayland: xorg-x11-server: use-after-free in syncchangecounter()
Summary
A use-after-free flaw was found in the X.Org X server and Xwayland in SyncChangeCounter(). A client that sets up multiple SyncCounters can trigger a use-after-free when destroying those counters via a second client connection while changing those counters. This may be used to crash the server, or for privilege escalation if the X server runs as root.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
Assigner
References
URL Tags
https://access.redhat.com/errata/RHSA-2026:26562 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:26566 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:26590 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:26610 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:26709 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:28923 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:29844 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:36083 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:36085 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:36086 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:36087 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:36632 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:36633 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:36634 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:36768 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:36791 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:36792 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:36798 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:38502 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:38810 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/security/cve/CVE-2026-50261 vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2485386 issue-trackingx_refsource_REDHAT
https://gitlab.freedesktop.org/xorg/xserver/-/com…
https://lists.x.org/archives/xorg-announce/2026-J…
https://redhat.atlassian.net/browse/PSIRTSUPT-16950
https://security.access.redhat.com/data/csaf/v2/v… x_sadp-csaf-vex
Impacted products
Vendor Product Version
Red Hat Red Hat Enterprise Linux 10 Unaffected: 0:24.1.9-4.el10_2.2 , < * (rpm)
    cpe:/o:redhat:enterprise_linux:10.2
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support Unaffected: 0:24.1.5-6.el10_0.1 , < * (rpm)
    cpe:/o:redhat:enterprise_linux_eus:10.0
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 7 Extended Lifecycle Support Unaffected: 0:1.20.4-35.el7_9 , < * (rpm)
    cpe:/o:redhat:rhel_els:7
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 8 Unaffected: 0:21.1.3-20.el8_10.2 , < * (rpm)
    cpe:/a:redhat:enterprise_linux:8::appstream
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 8 Unaffected: 0:1.20.11-28.el8_10.2 , < * (rpm)
    cpe:/a:redhat:enterprise_linux:8::appstream
    cpe:/a:redhat:enterprise_linux:8::crb
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 8 Unaffected: 0:1.15.0-10.el8_10 , < * (rpm)
    cpe:/a:redhat:enterprise_linux:8::appstream
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support Unaffected: 0:1.20.10-5.el8_4 , < * (rpm)
    cpe:/a:redhat:rhel_aus:8.4::appstream
    cpe:/a:redhat:rhel_eus_long_life:8.4::appstream
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On Unaffected: 0:1.20.10-5.el8_4 , < * (rpm)
    cpe:/a:redhat:rhel_aus:8.4::appstream
    cpe:/a:redhat:rhel_eus_long_life:8.4::appstream
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support Unaffected: 0:1.20.11-8.el8_6 , < * (rpm)
    cpe:/a:redhat:rhel_aus:8.6::appstream
    cpe:/a:redhat:rhel_eus_long_life:8.6::appstream
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support Unaffected: 0:21.1.3-2.el8_6.7 , < * (rpm)
    cpe:/a:redhat:rhel_aus:8.6::appstream
    cpe:/a:redhat:rhel_eus_long_life:8.6::appstream
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On Unaffected: 0:1.20.11-8.el8_6 , < * (rpm)
    cpe:/a:redhat:rhel_aus:8.6::appstream
    cpe:/a:redhat:rhel_eus_long_life:8.6::appstream
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On Unaffected: 0:21.1.3-2.el8_6.7 , < * (rpm)
    cpe:/a:redhat:rhel_aus:8.6::appstream
    cpe:/a:redhat:rhel_eus_long_life:8.6::appstream
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service Unaffected: 0:1.20.11-19.el8_8 , < * (rpm)
    cpe:/a:redhat:rhel_e4s:8.8::appstream
    cpe:/a:redhat:rhel_tus:8.8::appstream
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service Unaffected: 0:21.1.3-13.el8_8.1 , < * (rpm)
    cpe:/a:redhat:rhel_e4s:8.8::appstream
    cpe:/a:redhat:rhel_tus:8.8::appstream
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions Unaffected: 0:1.20.11-19.el8_8 , < * (rpm)
    cpe:/a:redhat:rhel_e4s:8.8::appstream
    cpe:/a:redhat:rhel_tus:8.8::appstream
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions Unaffected: 0:21.1.3-13.el8_8.1 , < * (rpm)
    cpe:/a:redhat:rhel_e4s:8.8::appstream
    cpe:/a:redhat:rhel_tus:8.8::appstream
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 9 Unaffected: 0:24.1.9-4.el9_8.2 , < * (rpm)
    cpe:/a:redhat:enterprise_linux:9::appstream
    cpe:/a:redhat:enterprise_linux:9::crb
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 9 Unaffected: 0:1.20.11-34.el9_8.2 , < * (rpm)
    cpe:/a:redhat:enterprise_linux:9::appstream
    cpe:/a:redhat:enterprise_linux:9::crb
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 9 Unaffected: 0:1.15.0-7.el9_8.2 , < * (rpm)
    cpe:/a:redhat:enterprise_linux:9::appstream
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions Unaffected: 0:1.20.11-21.el9_2 , < * (rpm)
    cpe:/a:redhat:rhel_e4s:9.2::appstream
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions Unaffected: 0:21.1.3-10.el9_2.1 , < * (rpm)
    cpe:/a:redhat:rhel_e4s:9.2::appstream
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions Unaffected: 0:1.20.11-29.el9_4 , < * (rpm)
    cpe:/a:redhat:rhel_e4s:9.4::appstream
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions Unaffected: 0:22.1.9-8.el9_4.1 , < * (rpm)
    cpe:/a:redhat:rhel_e4s:9.4::appstream
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support Unaffected: 0:1.20.11-34.el9_6 , < * (rpm)
    cpe:/a:redhat:rhel_eus:9.6::appstream
    cpe:/a:redhat:rhel_eus:9.6::crb
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support Unaffected: 0:23.2.7-6.el9_6.1 , < * (rpm)
    cpe:/a:redhat:rhel_eus:9.6::appstream
    cpe:/a:redhat:rhel_eus:9.6::crb
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 6     cpe:/o:redhat:enterprise_linux:6
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 7     cpe:/o:redhat:enterprise_linux:7
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux Server (v. 7 ELS)     cpe:/o:redhat:rhel_els:7
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux Server Optional (v. 7 ELS)     cpe:/o:redhat:rhel_els:7
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux AppStream EUS (v. 10.0)     cpe:/o:redhat:enterprise_linux_eus:10.0
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux AppStream (v. 10)     cpe:/o:redhat:enterprise_linux:10.2
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux AppStream (v. 8)     cpe:/a:redhat:enterprise_linux:8::appstream
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux AppStream AUS (v.8.4)     cpe:/a:redhat:rhel_aus:8.4::appstream
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4)     cpe:/a:redhat:rhel_eus_long_life:8.4::appstream
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux AppStream AUS (v.8.6)     cpe:/a:redhat:rhel_aus:8.6::appstream
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6)     cpe:/a:redhat:rhel_eus_long_life:8.6::appstream
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux AppStream E4S (v.8.8)     cpe:/a:redhat:rhel_e4s:8.8::appstream
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux AppStream TUS (v.8.8)     cpe:/a:redhat:rhel_tus:8.8::appstream
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux AppStream E4S (v.9.2)     cpe:/a:redhat:rhel_e4s:9.2::appstream
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux AppStream E4S (v.9.4)     cpe:/a:redhat:rhel_e4s:9.4::appstream
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux AppStream EUS (v.9.6)     cpe:/a:redhat:rhel_eus:9.6::appstream
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux AppStream (v. 9)     cpe:/a:redhat:enterprise_linux:9::appstream
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0)     cpe:/o:redhat:enterprise_linux_eus:10.0
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)     cpe:/o:redhat:enterprise_linux:10.2
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux CRB (v. 8)     cpe:/a:redhat:enterprise_linux:8::crb
 Create a notification for this product.
Red Hat Red Hat CodeReady Linux Builder EUS (v.9.6)     cpe:/a:redhat:rhel_eus:9.6::crb
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)     cpe:/a:redhat:enterprise_linux:9::crb
 Create a notification for this product.
Date Public
2026-06-02 00:00
Credits
Upstream acknowledges Anonymous (Trend Micro Zero Day Initiative) as the original reporter.
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-50261",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-06-05T00:00:00+00:00",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-06-06T03:56:14.286Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      },
      {
        "affected": [
          {
            "cpes": [
              "cpe:/o:redhat:rhel_els:7"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Enterprise Linux Server (v. 7 ELS)",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/o:redhat:rhel_els:7"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Enterprise Linux Server Optional (v. 7 ELS)",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/o:redhat:enterprise_linux_eus:10.0"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Enterprise Linux AppStream EUS (v. 10.0)",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/o:redhat:enterprise_linux:10.2"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Enterprise Linux AppStream (v. 10)",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:enterprise_linux:8::appstream"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Enterprise Linux AppStream (v. 8)",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:rhel_aus:8.4::appstream"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Enterprise Linux AppStream AUS (v.8.4)",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:rhel_eus_long_life:8.4::appstream"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4)",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:rhel_aus:8.6::appstream"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Enterprise Linux AppStream AUS (v.8.6)",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:rhel_eus_long_life:8.6::appstream"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6)",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:rhel_e4s:8.8::appstream"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Enterprise Linux AppStream E4S (v.8.8)",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:rhel_tus:8.8::appstream"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Enterprise Linux AppStream TUS (v.8.8)",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:rhel_e4s:9.2::appstream"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Enterprise Linux AppStream E4S (v.9.2)",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:rhel_e4s:9.4::appstream"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Enterprise Linux AppStream E4S (v.9.4)",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:rhel_eus:9.6::appstream"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Enterprise Linux AppStream EUS (v.9.6)",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:enterprise_linux:9::appstream"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Enterprise Linux AppStream (v. 9)",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/o:redhat:enterprise_linux_eus:10.0"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0)",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/o:redhat:enterprise_linux:10.2"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:enterprise_linux:8::crb"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Enterprise Linux CRB (v. 8)",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:rhel_eus:9.6::crb"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat CodeReady Linux Builder EUS (v.9.6)",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:enterprise_linux:9::crb"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/o:redhat:enterprise_linux:6"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Enterprise Linux 6",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/o:redhat:enterprise_linux:7"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Enterprise Linux 7",
            "vendor": "Red Hat"
          }
        ],
        "datePublic": "2026-06-02T00:00:00.000Z",
        "descriptions": [
          {
            "lang": "en",
            "value": "A use-after-free flaw was found in the X.Org X server and Xwayland in SyncChangeCounter(). A client that sets up multiple SyncCounters can trigger a use-after-free when destroying those counters via a second client connection while changing those counters. This may be used to crash the server, or for privilege escalation if the X server runs as root."
          }
        ],
        "metrics": [
          {
            "other": {
              "content": {
                "namespace": "https://access.redhat.com/security/updates/classification/",
                "value": "Important"
              },
              "type": "Red Hat severity rating"
            }
          },
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "LOCAL",
              "availabilityImpact": "HIGH",
              "baseScore": 7.8,
              "baseSeverity": "HIGH",
              "confidentialityImpact": "HIGH",
              "integrityImpact": "HIGH",
              "privilegesRequired": "LOW",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
              "version": "3.1"
            },
            "format": "CVSS"
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "cweId": "CWE-416",
                "description": "Use After Free",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-07-13T12:05:02.890Z",
          "orgId": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c",
          "shortName": "redhat-SADP"
        },
        "references": [
          {
            "tags": [
              "vdb-entry",
              "x_refsource_REDHAT"
            ],
            "url": "https://access.redhat.com/security/cve/CVE-2026-50261"
          },
          {
            "name": "RHBZ#2485386",
            "tags": [
              "issue-tracking",
              "x_refsource_REDHAT"
            ],
            "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2485386"
          },
          {
            "tags": [
              "x_sadp-csaf-vex"
            ],
            "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-50261.json"
          },
          {
            "tags": [
              "vendor-advisory",
              "x_refsource_REDHAT"
            ],
            "url": "https://access.redhat.com/errata/RHSA-2026:36083"
          },
          {
            "tags": [
              "vendor-advisory",
              "x_refsource_REDHAT"
            ],
            "url": "https://access.redhat.com/errata/RHSA-2026:36798"
          },
          {
            "tags": [
              "vendor-advisory",
              "x_refsource_REDHAT"
            ],
            "url": "https://access.redhat.com/errata/RHSA-2026:26566"
          },
          {
            "tags": [
              "vendor-advisory",
              "x_refsource_REDHAT"
            ],
            "url": "https://access.redhat.com/errata/RHSA-2026:28923"
          },
          {
            "tags": [
              "vendor-advisory",
              "x_refsource_REDHAT"
            ],
            "url": "https://access.redhat.com/errata/RHSA-2026:26709"
          },
          {
            "tags": [
              "vendor-advisory",
              "x_refsource_REDHAT"
            ],
            "url": "https://access.redhat.com/errata/RHSA-2026:26562"
          },
          {
            "tags": [
              "vendor-advisory",
              "x_refsource_REDHAT"
            ],
            "url": "https://access.redhat.com/errata/RHSA-2026:36792"
          },
          {
            "tags": [
              "vendor-advisory",
              "x_refsource_REDHAT"
            ],
            "url": "https://access.redhat.com/errata/RHSA-2026:36791"
          },
          {
            "tags": [
              "vendor-advisory",
              "x_refsource_REDHAT"
            ],
            "url": "https://access.redhat.com/errata/RHSA-2026:38810"
          },
          {
            "tags": [
              "vendor-advisory",
              "x_refsource_REDHAT"
            ],
            "url": "https://access.redhat.com/errata/RHSA-2026:36768"
          },
          {
            "tags": [
              "vendor-advisory",
              "x_refsource_REDHAT"
            ],
            "url": "https://access.redhat.com/errata/RHSA-2026:38502"
          },
          {
            "tags": [
              "vendor-advisory",
              "x_refsource_REDHAT"
            ],
            "url": "https://access.redhat.com/errata/RHSA-2026:36086"
          },
          {
            "tags": [
              "vendor-advisory",
              "x_refsource_REDHAT"
            ],
            "url": "https://access.redhat.com/errata/RHSA-2026:36633"
          },
          {
            "tags": [
              "vendor-advisory",
              "x_refsource_REDHAT"
            ],
            "url": "https://access.redhat.com/errata/RHSA-2026:36087"
          },
          {
            "tags": [
              "vendor-advisory",
              "x_refsource_REDHAT"
            ],
            "url": "https://access.redhat.com/errata/RHSA-2026:36632"
          },
          {
            "tags": [
              "vendor-advisory",
              "x_refsource_REDHAT"
            ],
            "url": "https://access.redhat.com/errata/RHSA-2026:36085"
          },
          {
            "tags": [
              "vendor-advisory",
              "x_refsource_REDHAT"
            ],
            "url": "https://access.redhat.com/errata/RHSA-2026:36634"
          },
          {
            "tags": [
              "vendor-advisory",
              "x_refsource_REDHAT"
            ],
            "url": "https://access.redhat.com/errata/RHSA-2026:29844"
          },
          {
            "tags": [
              "vendor-advisory",
              "x_refsource_REDHAT"
            ],
            "url": "https://access.redhat.com/errata/RHSA-2026:26610"
          },
          {
            "tags": [
              "vendor-advisory",
              "x_refsource_REDHAT"
            ],
            "url": "https://access.redhat.com/errata/RHSA-2026:26590"
          }
        ],
        "solutions": [
          {
            "lang": "en",
            "value": "RHSA-2026:36083: Red Hat Enterprise Linux Server (v. 7 ELS), Red Hat Enterprise Linux Server Optional (v. 7 ELS)"
          },
          {
            "lang": "en",
            "value": "RHSA-2026:36798: Red Hat Enterprise Linux AppStream EUS (v. 10.0), Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0)"
          },
          {
            "lang": "en",
            "value": "RHSA-2026:26566: Red Hat Enterprise Linux AppStream (v. 10), Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)"
          },
          {
            "lang": "en",
            "value": "RHSA-2026:28923: Red Hat Enterprise Linux AppStream (v. 8)"
          },
          {
            "lang": "en",
            "value": "RHSA-2026:26709: Red Hat Enterprise Linux AppStream (v. 8), Red Hat Enterprise Linux CRB (v. 8)"
          },
          {
            "lang": "en",
            "value": "RHSA-2026:26562: Red Hat Enterprise Linux AppStream (v. 8)"
          },
          {
            "lang": "en",
            "value": "RHSA-2026:36792: Red Hat Enterprise Linux AppStream AUS (v.8.4), Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4)"
          },
          {
            "lang": "en",
            "value": "RHSA-2026:36791: Red Hat Enterprise Linux AppStream AUS (v.8.6), Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6)"
          },
          {
            "lang": "en",
            "value": "RHSA-2026:38810: Red Hat Enterprise Linux AppStream AUS (v.8.6), Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6)"
          },
          {
            "lang": "en",
            "value": "RHSA-2026:36768: Red Hat Enterprise Linux AppStream E4S (v.8.8), Red Hat Enterprise Linux AppStream TUS (v.8.8)"
          },
          {
            "lang": "en",
            "value": "RHSA-2026:38502: Red Hat Enterprise Linux AppStream E4S (v.8.8), Red Hat Enterprise Linux AppStream TUS (v.8.8)"
          },
          {
            "lang": "en",
            "value": "RHSA-2026:36086: Red Hat Enterprise Linux AppStream E4S (v.9.2)"
          },
          {
            "lang": "en",
            "value": "RHSA-2026:36633: Red Hat Enterprise Linux AppStream E4S (v.9.2)"
          },
          {
            "lang": "en",
            "value": "RHSA-2026:36087: Red Hat Enterprise Linux AppStream E4S (v.9.4)"
          },
          {
            "lang": "en",
            "value": "RHSA-2026:36632: Red Hat Enterprise Linux AppStream E4S (v.9.4)"
          },
          {
            "lang": "en",
            "value": "RHSA-2026:36085: Red Hat CodeReady Linux Builder EUS (v.9.6), Red Hat Enterprise Linux AppStream EUS (v.9.6)"
          },
          {
            "lang": "en",
            "value": "RHSA-2026:36634: Red Hat CodeReady Linux Builder EUS (v.9.6), Red Hat Enterprise Linux AppStream EUS (v.9.6)"
          },
          {
            "lang": "en",
            "value": "RHSA-2026:29844: Red Hat Enterprise Linux AppStream (v. 9)"
          },
          {
            "lang": "en",
            "value": "RHSA-2026:26610: Red Hat Enterprise Linux AppStream (v. 9), Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)"
          },
          {
            "lang": "en",
            "value": "RHSA-2026:26590: Red Hat Enterprise Linux AppStream (v. 9), Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)"
          }
        ],
        "timeline": [
          {
            "lang": "en",
            "time": "2026-05-15T03:14:46.000Z",
            "value": "Reported to Red Hat."
          },
          {
            "lang": "en",
            "time": "2026-06-02T00:00:00.000Z",
            "value": "Made public."
          }
        ],
        "title": "xorg-x11-server: xorg-x11-server-Xwayland: xorg-x11-server: use-after-free in SyncChangeCounter()",
        "x_adpType": "supplier",
        "x_generator": {
          "engine": "sadp-cli 1.0.0"
        }
      }
    ],
    "cna": {
      "affected": [
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/o:redhat:enterprise_linux:10.2"
          ],
          "defaultStatus": "affected",
          "packageName": "xorg-x11-server-Xwayland",
          "product": "Red Hat Enterprise Linux 10",
          "vendor": "Red Hat",
          "versions": [
            {
              "lessThan": "*",
              "status": "unaffected",
              "version": "0:24.1.9-4.el10_2.2",
              "versionType": "rpm"
            }
          ]
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/o:redhat:enterprise_linux_eus:10.0"
          ],
          "defaultStatus": "affected",
          "packageName": "xorg-x11-server-Xwayland",
          "product": "Red Hat Enterprise Linux 10.0 Extended Update Support",
          "vendor": "Red Hat",
          "versions": [
            {
              "lessThan": "*",
              "status": "unaffected",
              "version": "0:24.1.5-6.el10_0.1",
              "versionType": "rpm"
            }
          ]
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/o:redhat:rhel_els:7"
          ],
          "defaultStatus": "affected",
          "packageName": "xorg-x11-server",
          "product": "Red Hat Enterprise Linux 7 Extended Lifecycle Support",
          "vendor": "Red Hat",
          "versions": [
            {
              "lessThan": "*",
              "status": "unaffected",
              "version": "0:1.20.4-35.el7_9",
              "versionType": "rpm"
            }
          ]
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/a:redhat:enterprise_linux:8::appstream"
          ],
          "defaultStatus": "affected",
          "packageName": "xorg-x11-server-Xwayland",
          "product": "Red Hat Enterprise Linux 8",
          "vendor": "Red Hat",
          "versions": [
            {
              "lessThan": "*",
              "status": "unaffected",
              "version": "0:21.1.3-20.el8_10.2",
              "versionType": "rpm"
            }
          ]
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/a:redhat:enterprise_linux:8::appstream",
            "cpe:/a:redhat:enterprise_linux:8::crb"
          ],
          "defaultStatus": "affected",
          "packageName": "xorg-x11-server",
          "product": "Red Hat Enterprise Linux 8",
          "vendor": "Red Hat",
          "versions": [
            {
              "lessThan": "*",
              "status": "unaffected",
              "version": "0:1.20.11-28.el8_10.2",
              "versionType": "rpm"
            }
          ]
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/a:redhat:enterprise_linux:8::appstream"
          ],
          "defaultStatus": "affected",
          "packageName": "tigervnc",
          "product": "Red Hat Enterprise Linux 8",
          "vendor": "Red Hat",
          "versions": [
            {
              "lessThan": "*",
              "status": "unaffected",
              "version": "0:1.15.0-10.el8_10",
              "versionType": "rpm"
            }
          ]
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/a:redhat:rhel_aus:8.4::appstream",
            "cpe:/a:redhat:rhel_eus_long_life:8.4::appstream"
          ],
          "defaultStatus": "affected",
          "packageName": "xorg-x11-server",
          "product": "Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support",
          "vendor": "Red Hat",
          "versions": [
            {
              "lessThan": "*",
              "status": "unaffected",
              "version": "0:1.20.10-5.el8_4",
              "versionType": "rpm"
            }
          ]
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/a:redhat:rhel_aus:8.4::appstream",
            "cpe:/a:redhat:rhel_eus_long_life:8.4::appstream"
          ],
          "defaultStatus": "affected",
          "packageName": "xorg-x11-server",
          "product": "Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On",
          "vendor": "Red Hat",
          "versions": [
            {
              "lessThan": "*",
              "status": "unaffected",
              "version": "0:1.20.10-5.el8_4",
              "versionType": "rpm"
            }
          ]
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/a:redhat:rhel_aus:8.6::appstream",
            "cpe:/a:redhat:rhel_eus_long_life:8.6::appstream"
          ],
          "defaultStatus": "affected",
          "packageName": "xorg-x11-server",
          "product": "Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support",
          "vendor": "Red Hat",
          "versions": [
            {
              "lessThan": "*",
              "status": "unaffected",
              "version": "0:1.20.11-8.el8_6",
              "versionType": "rpm"
            }
          ]
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/a:redhat:rhel_aus:8.6::appstream",
            "cpe:/a:redhat:rhel_eus_long_life:8.6::appstream"
          ],
          "defaultStatus": "affected",
          "packageName": "xorg-x11-server-Xwayland",
          "product": "Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support",
          "vendor": "Red Hat",
          "versions": [
            {
              "lessThan": "*",
              "status": "unaffected",
              "version": "0:21.1.3-2.el8_6.7",
              "versionType": "rpm"
            }
          ]
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/a:redhat:rhel_aus:8.6::appstream",
            "cpe:/a:redhat:rhel_eus_long_life:8.6::appstream"
          ],
          "defaultStatus": "affected",
          "packageName": "xorg-x11-server",
          "product": "Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On",
          "vendor": "Red Hat",
          "versions": [
            {
              "lessThan": "*",
              "status": "unaffected",
              "version": "0:1.20.11-8.el8_6",
              "versionType": "rpm"
            }
          ]
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/a:redhat:rhel_aus:8.6::appstream",
            "cpe:/a:redhat:rhel_eus_long_life:8.6::appstream"
          ],
          "defaultStatus": "affected",
          "packageName": "xorg-x11-server-Xwayland",
          "product": "Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On",
          "vendor": "Red Hat",
          "versions": [
            {
              "lessThan": "*",
              "status": "unaffected",
              "version": "0:21.1.3-2.el8_6.7",
              "versionType": "rpm"
            }
          ]
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/a:redhat:rhel_e4s:8.8::appstream",
            "cpe:/a:redhat:rhel_tus:8.8::appstream"
          ],
          "defaultStatus": "affected",
          "packageName": "xorg-x11-server",
          "product": "Red Hat Enterprise Linux 8.8 Telecommunications Update Service",
          "vendor": "Red Hat",
          "versions": [
            {
              "lessThan": "*",
              "status": "unaffected",
              "version": "0:1.20.11-19.el8_8",
              "versionType": "rpm"
            }
          ]
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/a:redhat:rhel_e4s:8.8::appstream",
            "cpe:/a:redhat:rhel_tus:8.8::appstream"
          ],
          "defaultStatus": "affected",
          "packageName": "xorg-x11-server-Xwayland",
          "product": "Red Hat Enterprise Linux 8.8 Telecommunications Update Service",
          "vendor": "Red Hat",
          "versions": [
            {
              "lessThan": "*",
              "status": "unaffected",
              "version": "0:21.1.3-13.el8_8.1",
              "versionType": "rpm"
            }
          ]
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/a:redhat:rhel_e4s:8.8::appstream",
            "cpe:/a:redhat:rhel_tus:8.8::appstream"
          ],
          "defaultStatus": "affected",
          "packageName": "xorg-x11-server",
          "product": "Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions",
          "vendor": "Red Hat",
          "versions": [
            {
              "lessThan": "*",
              "status": "unaffected",
              "version": "0:1.20.11-19.el8_8",
              "versionType": "rpm"
            }
          ]
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/a:redhat:rhel_e4s:8.8::appstream",
            "cpe:/a:redhat:rhel_tus:8.8::appstream"
          ],
          "defaultStatus": "affected",
          "packageName": "xorg-x11-server-Xwayland",
          "product": "Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions",
          "vendor": "Red Hat",
          "versions": [
            {
              "lessThan": "*",
              "status": "unaffected",
              "version": "0:21.1.3-13.el8_8.1",
              "versionType": "rpm"
            }
          ]
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/a:redhat:enterprise_linux:9::appstream",
            "cpe:/a:redhat:enterprise_linux:9::crb"
          ],
          "defaultStatus": "affected",
          "packageName": "xorg-x11-server-Xwayland",
          "product": "Red Hat Enterprise Linux 9",
          "vendor": "Red Hat",
          "versions": [
            {
              "lessThan": "*",
              "status": "unaffected",
              "version": "0:24.1.9-4.el9_8.2",
              "versionType": "rpm"
            }
          ]
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/a:redhat:enterprise_linux:9::appstream",
            "cpe:/a:redhat:enterprise_linux:9::crb"
          ],
          "defaultStatus": "affected",
          "packageName": "xorg-x11-server",
          "product": "Red Hat Enterprise Linux 9",
          "vendor": "Red Hat",
          "versions": [
            {
              "lessThan": "*",
              "status": "unaffected",
              "version": "0:1.20.11-34.el9_8.2",
              "versionType": "rpm"
            }
          ]
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/a:redhat:enterprise_linux:9::appstream"
          ],
          "defaultStatus": "affected",
          "packageName": "tigervnc",
          "product": "Red Hat Enterprise Linux 9",
          "vendor": "Red Hat",
          "versions": [
            {
              "lessThan": "*",
              "status": "unaffected",
              "version": "0:1.15.0-7.el9_8.2",
              "versionType": "rpm"
            }
          ]
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/a:redhat:rhel_e4s:9.2::appstream"
          ],
          "defaultStatus": "affected",
          "packageName": "xorg-x11-server",
          "product": "Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions",
          "vendor": "Red Hat",
          "versions": [
            {
              "lessThan": "*",
              "status": "unaffected",
              "version": "0:1.20.11-21.el9_2",
              "versionType": "rpm"
            }
          ]
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/a:redhat:rhel_e4s:9.2::appstream"
          ],
          "defaultStatus": "affected",
          "packageName": "xorg-x11-server-Xwayland",
          "product": "Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions",
          "vendor": "Red Hat",
          "versions": [
            {
              "lessThan": "*",
              "status": "unaffected",
              "version": "0:21.1.3-10.el9_2.1",
              "versionType": "rpm"
            }
          ]
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/a:redhat:rhel_e4s:9.4::appstream"
          ],
          "defaultStatus": "affected",
          "packageName": "xorg-x11-server",
          "product": "Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions",
          "vendor": "Red Hat",
          "versions": [
            {
              "lessThan": "*",
              "status": "unaffected",
              "version": "0:1.20.11-29.el9_4",
              "versionType": "rpm"
            }
          ]
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/a:redhat:rhel_e4s:9.4::appstream"
          ],
          "defaultStatus": "affected",
          "packageName": "xorg-x11-server-Xwayland",
          "product": "Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions",
          "vendor": "Red Hat",
          "versions": [
            {
              "lessThan": "*",
              "status": "unaffected",
              "version": "0:22.1.9-8.el9_4.1",
              "versionType": "rpm"
            }
          ]
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/a:redhat:rhel_eus:9.6::appstream",
            "cpe:/a:redhat:rhel_eus:9.6::crb"
          ],
          "defaultStatus": "affected",
          "packageName": "xorg-x11-server",
          "product": "Red Hat Enterprise Linux 9.6 Extended Update Support",
          "vendor": "Red Hat",
          "versions": [
            {
              "lessThan": "*",
              "status": "unaffected",
              "version": "0:1.20.11-34.el9_6",
              "versionType": "rpm"
            }
          ]
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/a:redhat:rhel_eus:9.6::appstream",
            "cpe:/a:redhat:rhel_eus:9.6::crb"
          ],
          "defaultStatus": "affected",
          "packageName": "xorg-x11-server-Xwayland",
          "product": "Red Hat Enterprise Linux 9.6 Extended Update Support",
          "vendor": "Red Hat",
          "versions": [
            {
              "lessThan": "*",
              "status": "unaffected",
              "version": "0:23.2.7-6.el9_6.1",
              "versionType": "rpm"
            }
          ]
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/o:redhat:enterprise_linux:6"
          ],
          "defaultStatus": "affected",
          "packageName": "tigervnc",
          "product": "Red Hat Enterprise Linux 6",
          "vendor": "Red Hat"
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/o:redhat:enterprise_linux:6"
          ],
          "defaultStatus": "unknown",
          "packageName": "xorg-x11-server",
          "product": "Red Hat Enterprise Linux 6",
          "vendor": "Red Hat"
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/o:redhat:enterprise_linux:7"
          ],
          "defaultStatus": "affected",
          "packageName": "tigervnc",
          "product": "Red Hat Enterprise Linux 7",
          "vendor": "Red Hat"
        }
      ],
      "credits": [
        {
          "lang": "en",
          "value": "Upstream acknowledges Anonymous (Trend Micro Zero Day Initiative) as the original reporter."
        }
      ],
      "datePublic": "2026-06-02T00:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "A use-after-free flaw was found in the X.Org X server and Xwayland in SyncChangeCounter(). A client that sets up multiple SyncCounters can trigger a use-after-free when destroying those counters via a second client connection while changing those counters. This may be used to crash the server, or for privilege escalation if the X server runs as root."
        }
      ],
      "metrics": [
        {
          "other": {
            "content": {
              "namespace": "https://access.redhat.com/security/updates/classification/",
              "value": "Important"
            },
            "type": "Red Hat severity rating"
          }
        },
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "HIGH",
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "format": "CVSS"
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-416",
              "description": "Use After Free",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-07-13T10:54:07.756Z",
        "orgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
        "shortName": "redhat"
      },
      "references": [
        {
          "name": "RHSA-2026:26562",
          "tags": [
            "vendor-advisory",
            "x_refsource_REDHAT"
          ],
          "url": "https://access.redhat.com/errata/RHSA-2026:26562"
        },
        {
          "name": "RHSA-2026:26566",
          "tags": [
            "vendor-advisory",
            "x_refsource_REDHAT"
          ],
          "url": "https://access.redhat.com/errata/RHSA-2026:26566"
        },
        {
          "name": "RHSA-2026:26590",
          "tags": [
            "vendor-advisory",
            "x_refsource_REDHAT"
          ],
          "url": "https://access.redhat.com/errata/RHSA-2026:26590"
        },
        {
          "name": "RHSA-2026:26610",
          "tags": [
            "vendor-advisory",
            "x_refsource_REDHAT"
          ],
          "url": "https://access.redhat.com/errata/RHSA-2026:26610"
        },
        {
          "name": "RHSA-2026:26709",
          "tags": [
            "vendor-advisory",
            "x_refsource_REDHAT"
          ],
          "url": "https://access.redhat.com/errata/RHSA-2026:26709"
        },
        {
          "name": "RHSA-2026:28923",
          "tags": [
            "vendor-advisory",
            "x_refsource_REDHAT"
          ],
          "url": "https://access.redhat.com/errata/RHSA-2026:28923"
        },
        {
          "name": "RHSA-2026:29844",
          "tags": [
            "vendor-advisory",
            "x_refsource_REDHAT"
          ],
          "url": "https://access.redhat.com/errata/RHSA-2026:29844"
        },
        {
          "name": "RHSA-2026:36083",
          "tags": [
            "vendor-advisory",
            "x_refsource_REDHAT"
          ],
          "url": "https://access.redhat.com/errata/RHSA-2026:36083"
        },
        {
          "name": "RHSA-2026:36085",
          "tags": [
            "vendor-advisory",
            "x_refsource_REDHAT"
          ],
          "url": "https://access.redhat.com/errata/RHSA-2026:36085"
        },
        {
          "name": "RHSA-2026:36086",
          "tags": [
            "vendor-advisory",
            "x_refsource_REDHAT"
          ],
          "url": "https://access.redhat.com/errata/RHSA-2026:36086"
        },
        {
          "name": "RHSA-2026:36087",
          "tags": [
            "vendor-advisory",
            "x_refsource_REDHAT"
          ],
          "url": "https://access.redhat.com/errata/RHSA-2026:36087"
        },
        {
          "name": "RHSA-2026:36632",
          "tags": [
            "vendor-advisory",
            "x_refsource_REDHAT"
          ],
          "url": "https://access.redhat.com/errata/RHSA-2026:36632"
        },
        {
          "name": "RHSA-2026:36633",
          "tags": [
            "vendor-advisory",
            "x_refsource_REDHAT"
          ],
          "url": "https://access.redhat.com/errata/RHSA-2026:36633"
        },
        {
          "name": "RHSA-2026:36634",
          "tags": [
            "vendor-advisory",
            "x_refsource_REDHAT"
          ],
          "url": "https://access.redhat.com/errata/RHSA-2026:36634"
        },
        {
          "name": "RHSA-2026:36768",
          "tags": [
            "vendor-advisory",
            "x_refsource_REDHAT"
          ],
          "url": "https://access.redhat.com/errata/RHSA-2026:36768"
        },
        {
          "name": "RHSA-2026:36791",
          "tags": [
            "vendor-advisory",
            "x_refsource_REDHAT"
          ],
          "url": "https://access.redhat.com/errata/RHSA-2026:36791"
        },
        {
          "name": "RHSA-2026:36792",
          "tags": [
            "vendor-advisory",
            "x_refsource_REDHAT"
          ],
          "url": "https://access.redhat.com/errata/RHSA-2026:36792"
        },
        {
          "name": "RHSA-2026:36798",
          "tags": [
            "vendor-advisory",
            "x_refsource_REDHAT"
          ],
          "url": "https://access.redhat.com/errata/RHSA-2026:36798"
        },
        {
          "name": "RHSA-2026:38502",
          "tags": [
            "vendor-advisory",
            "x_refsource_REDHAT"
          ],
          "url": "https://access.redhat.com/errata/RHSA-2026:38502"
        },
        {
          "name": "RHSA-2026:38810",
          "tags": [
            "vendor-advisory",
            "x_refsource_REDHAT"
          ],
          "url": "https://access.redhat.com/errata/RHSA-2026:38810"
        },
        {
          "tags": [
            "vdb-entry",
            "x_refsource_REDHAT"
          ],
          "url": "https://access.redhat.com/security/cve/CVE-2026-50261"
        },
        {
          "name": "RHBZ#2485386",
          "tags": [
            "issue-tracking",
            "x_refsource_REDHAT"
          ],
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2485386"
        },
        {
          "url": "https://gitlab.freedesktop.org/xorg/xserver/-/commit/bdd7bf57af208b1ddf57d4683d67104443b44812"
        },
        {
          "url": "https://lists.x.org/archives/xorg-announce/2026-June/003702.html"
        },
        {
          "url": "https://redhat.atlassian.net/browse/PSIRTSUPT-16950"
        }
      ],
      "timeline": [
        {
          "lang": "en",
          "time": "2026-05-15T03:14:46.000Z",
          "value": "Reported to Red Hat."
        },
        {
          "lang": "en",
          "time": "2026-06-02T00:00:00.000Z",
          "value": "Made public."
        }
      ],
      "title": "Xorg-x11-server: xorg-x11-server-xwayland: xorg-x11-server: use-after-free in syncchangecounter()",
      "x_generator": {
        "engine": "cvelib 1.8.0"
      },
      "x_redhatCweChain": "CWE-416: Use After Free"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
    "assignerShortName": "redhat",
    "cveId": "CVE-2026-50261",
    "datePublished": "2026-06-05T10:36:33.418Z",
    "dateReserved": "2026-06-04T14:55:24.012Z",
    "dateUpdated": "2026-07-13T12:05:02.890Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}
Mitigation

Phase: Architecture and Design

Strategy: Language Selection

Description:

  • Choose a language that provides automatic memory management.
Mitigation

Phase: Implementation

Strategy: Attack Surface Reduction

Description:

  • When freeing pointers, be sure to set them to NULL once they are freed. However, the utilization of multiple or complex data structures may lower the usefulness of this strategy.

No CAPEC attack patterns related to this CWE.

Back to CWE stats page