CVE-2021-3489 (GCVE-0-2021-3489)

Vulnerability from cvelistv5 – Published: 2021-06-04 01:40 – Updated: 2024-09-16 20:21
VLAI
Title
Linux kernel eBPF RINGBUF map oversized allocation
Summary
The eBPF RINGBUF bpf_ringbuf_reserve() function in the Linux kernel did not check that the allocated size was smaller than the ringbuf size, allowing an attacker to perform out-of-bounds writes within the kernel and therefore, arbitrary code execution. This issue was fixed via commit 4b81ccebaeee ("bpf, ringbuf: Deny reserve of buffers larger than ringbuf") (v5.13-rc4) and backported to the stable kernels in v5.12.4, v5.11.21, and v5.10.37. It was introduced via 457f44363a88 ("bpf: Implement BPF ring buffer and verifier support for it") (v5.8-rc1).
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
CWE
  • CWE-119 - Improper Restriction of Operations within the Bounds of a Memory Buffer
  • CWE-787 - Out-of-bounds Write
Assigner
canonical CNA under the mitre root
CNA scorecard B 82/100 over 59 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux kernel Affected: trunk , < v5.13-rc4 (custom)
Affected: linux-5.12.y , < v5.12.4 (custom)
Affected: linux-5.11.y , < v5.11.21 (custom)
Affected: linux-5.10.y , < v5.10.37 (custom)
Affected: v5.8 , < 5.8* (custom)
guessed Create a notification for this product.
Date Public
2021-05-11 00:00
Credits
Ryota Shiga (@Ga_ryo_) of Flatt Security working with Trend Micro's Zero Day Initiative
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-03T16:53:17.828Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "name": "[oss-security] CVE-2021-3489 - Linux kernel eBPF RINGBUF map oversized allocation",
            "tags": [
              "mailing-list",
              "x_refsource_MLIST",
              "x_transferred"
            ],
            "url": "https://www.openwall.com/lists/oss-security/2021/05/11/10"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf.git/commit/?id=4b81ccebaeee885ab1aa1438133f2991e3a2b6ea"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://www.zerodayinitiative.com/advisories/ZDI-21-590/"
          },
          {
            "tags": [
              "vendor-advisory",
              "x_refsource_UBUNTU",
              "x_transferred"
            ],
            "url": "https://ubuntu.com/security/notices/USN-4950-1"
          },
          {
            "tags": [
              "vendor-advisory",
              "x_refsource_UBUNTU",
              "x_transferred"
            ],
            "url": "https://ubuntu.com/security/notices/USN-4949-1"
          },
          {
            "tags": [
              "x_refsource_CONFIRM",
              "x_transferred"
            ],
            "url": "https://security.netapp.com/advisory/ntap-20210716-0004/"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "Linux kernel",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "v5.13-rc4",
              "status": "affected",
              "version": "trunk",
              "versionType": "custom"
            },
            {
              "lessThan": "v5.12.4",
              "status": "affected",
              "version": "linux-5.12.y",
              "versionType": "custom"
            },
            {
              "lessThan": "v5.11.21",
              "status": "affected",
              "version": "linux-5.11.y",
              "versionType": "custom"
            },
            {
              "lessThan": "v5.10.37",
              "status": "affected",
              "version": "linux-5.10.y",
              "versionType": "custom"
            },
            {
              "lessThan": "5.8*",
              "status": "affected",
              "version": "v5.8",
              "versionType": "custom"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "value": "Ryota Shiga (@Ga_ryo_) of Flatt Security working with Trend Micro\u0027s Zero Day Initiative"
        }
      ],
      "datePublic": "2021-05-11T00:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "The eBPF RINGBUF bpf_ringbuf_reserve() function in the Linux kernel did not check that the allocated size was smaller than the ringbuf size, allowing an attacker to perform out-of-bounds writes within the kernel and therefore, arbitrary code execution. This issue was fixed via commit 4b81ccebaeee (\"bpf, ringbuf: Deny reserve of buffers larger than ringbuf\") (v5.13-rc4) and backported to the stable kernels in v5.12.4, v5.11.21, and v5.10.37. It was introduced via 457f44363a88 (\"bpf: Implement BPF ring buffer and verifier support for it\") (v5.8-rc1)."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "HIGH",
            "attackVector": "LOCAL",
            "availabilityImpact": "HIGH",
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-119",
              "description": "CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-787",
              "description": "CWE-787 Out-of-bounds Write",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2021-07-16T10:06:26.000Z",
        "orgId": "cc1ad9ee-3454-478d-9317-d3e869d708bc",
        "shortName": "canonical"
      },
      "references": [
        {
          "name": "[oss-security] CVE-2021-3489 - Linux kernel eBPF RINGBUF map oversized allocation",
          "tags": [
            "mailing-list",
            "x_refsource_MLIST"
          ],
          "url": "https://www.openwall.com/lists/oss-security/2021/05/11/10"
        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf.git/commit/?id=4b81ccebaeee885ab1aa1438133f2991e3a2b6ea"
        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://www.zerodayinitiative.com/advisories/ZDI-21-590/"
        },
        {
          "tags": [
            "vendor-advisory",
            "x_refsource_UBUNTU"
          ],
          "url": "https://ubuntu.com/security/notices/USN-4950-1"
        },
        {
          "tags": [
            "vendor-advisory",
            "x_refsource_UBUNTU"
          ],
          "url": "https://ubuntu.com/security/notices/USN-4949-1"
        },
        {
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://security.netapp.com/advisory/ntap-20210716-0004/"
        }
      ],
      "source": {
        "discovery": "EXTERNAL"
      },
      "title": "Linux kernel eBPF RINGBUF map oversized allocation",
      "x_generator": {
        "engine": "Vulnogram 0.0.9"
      },
      "x_legacyV4Record": {
        "CVE_data_meta": {
          "ASSIGNER": "security@ubuntu.com",
          "DATE_PUBLIC": "2021-05-11 17:00 +0000",
          "ID": "CVE-2021-3489",
          "STATE": "PUBLIC",
          "TITLE": "Linux kernel eBPF RINGBUF map oversized allocation"
        },
        "affects": {
          "vendor": {
            "vendor_data": [
              {
                "product": {
                  "product_data": [
                    {
                      "product_name": "Linux kernel",
                      "version": {
                        "version_data": [
                          {
                            "version_affected": "\u003c",
                            "version_name": "trunk",
                            "version_value": "v5.13-rc4"
                          },
                          {
                            "version_affected": "\u003c",
                            "version_name": "linux-5.12.y",
                            "version_value": "v5.12.4"
                          },
                          {
                            "version_affected": "\u003c",
                            "version_name": "linux-5.11.y",
                            "version_value": "v5.11.21"
                          },
                          {
                            "version_affected": "\u003c",
                            "version_name": "linux-5.10.y",
                            "version_value": "v5.10.37"
                          },
                          {
                            "version_affected": "\u003e=",
                            "version_name": "5.8",
                            "version_value": "v5.8"
                          }
                        ]
                      }
                    }
                  ]
                },
                "vendor_name": "Linux"
              }
            ]
          }
        },
        "credit": [
          {
            "lang": "eng",
            "value": "Ryota Shiga (@Ga_ryo_) of Flatt Security working with Trend Micro\u0027s Zero Day Initiative"
          }
        ],
        "data_format": "MITRE",
        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
          "description_data": [
            {
              "lang": "eng",
              "value": "The eBPF RINGBUF bpf_ringbuf_reserve() function in the Linux kernel did not check that the allocated size was smaller than the ringbuf size, allowing an attacker to perform out-of-bounds writes within the kernel and therefore, arbitrary code execution. This issue was fixed via commit 4b81ccebaeee (\"bpf, ringbuf: Deny reserve of buffers larger than ringbuf\") (v5.13-rc4) and backported to the stable kernels in v5.12.4, v5.11.21, and v5.10.37. It was introduced via 457f44363a88 (\"bpf: Implement BPF ring buffer and verifier support for it\") (v5.8-rc1)."
            }
          ]
        },
        "generator": {
          "engine": "Vulnogram 0.0.9"
        },
        "impact": {
          "cvss": {
            "attackComplexity": "HIGH",
            "attackVector": "LOCAL",
            "availabilityImpact": "HIGH",
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H",
            "version": "3.1"
          }
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "eng",
                  "value": "CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer"
                }
              ]
            },
            {
              "description": [
                {
                  "lang": "eng",
                  "value": "CWE-787 Out-of-bounds Write"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "[oss-security] CVE-2021-3489 - Linux kernel eBPF RINGBUF map oversized allocation",
              "refsource": "MLIST",
              "url": "https://www.openwall.com/lists/oss-security/2021/05/11/10"
            },
            {
              "name": "https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf.git/commit/?id=4b81ccebaeee885ab1aa1438133f2991e3a2b6ea",
              "refsource": "MISC",
              "url": "https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf.git/commit/?id=4b81ccebaeee885ab1aa1438133f2991e3a2b6ea"
            },
            {
              "name": "https://www.zerodayinitiative.com/advisories/ZDI-21-590/",
              "refsource": "MISC",
              "url": "https://www.zerodayinitiative.com/advisories/ZDI-21-590/"
            },
            {
              "name": "https://ubuntu.com/security/notices/USN-4950-1",
              "refsource": "UBUNTU",
              "url": "https://ubuntu.com/security/notices/USN-4950-1"
            },
            {
              "name": "https://ubuntu.com/security/notices/USN-4949-1",
              "refsource": "UBUNTU",
              "url": "https://ubuntu.com/security/notices/USN-4949-1"
            },
            {
              "name": "https://security.netapp.com/advisory/ntap-20210716-0004/",
              "refsource": "CONFIRM",
              "url": "https://security.netapp.com/advisory/ntap-20210716-0004/"
            }
          ]
        },
        "source": {
          "discovery": "EXTERNAL"
        }
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "cc1ad9ee-3454-478d-9317-d3e869d708bc",
    "assignerShortName": "canonical",
    "cveId": "CVE-2021-3489",
    "datePublished": "2021-06-04T01:40:19.351Z",
    "dateReserved": "2021-04-09T00:00:00.000Z",
    "dateUpdated": "2024-09-16T20:21:42.116Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2021-3489",
      "date": "2026-10-22",
      "epss": "0.0055",
      "percentile": "0.45209"
    },
    "fkie_nvd": {
      "configurations": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "matchCriteriaId": "CD2F1C00-3D81-452B-AE61-0B2C1A536A1D",
                  "versionEndExcluding": "5.10.37",
                  "versionStartIncluding": "5.8",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "matchCriteriaId": "8CBB94EC-EC33-4464-99C5-03E5542715F0",
                  "versionEndExcluding": "5.11.21",
                  "versionStartIncluding": "5.11",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "matchCriteriaId": "D8C7052F-1B7B-4327-9C2B-84EBF3243838",
                  "versionEndExcluding": "5.12.4",
                  "versionStartIncluding": "5.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:5.13:-:*:*:*:*:*:*",
                  "matchCriteriaId": "8F0E7012-0BA3-4E6A-ADE9-57973CBDEE28",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:5.13:rc1:*:*:*:*:*:*",
                  "matchCriteriaId": "0CBAD0FC-C281-4666-AB2F-F8E6E1165DF7",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:5.13:rc2:*:*:*:*:*:*",
                  "matchCriteriaId": "96AC23B2-D46A-49D9-8203-8E1BEDCA8532",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:5.13:rc3:*:*:*:*:*:*",
                  "matchCriteriaId": "DA610E30-717C-4700-9F77-A3C9244F3BFD",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        },
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:*",
                  "matchCriteriaId": "902B8056-9E37-443B-8905-8AA93E2447FB",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:canonical:ubuntu_linux:20.10:*:*:*:*:*:*:*",
                  "matchCriteriaId": "338B3AAC-C147-4A31-95E7-6E8A6FB4B3FC",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:canonical:ubuntu_linux:21.04:*:*:*:*:*:*:*",
                  "matchCriteriaId": "8EF1C1CC-3FAE-4DE3-BC41-E5B14D5721F4",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "The eBPF RINGBUF bpf_ringbuf_reserve() function in the Linux kernel did not check that the allocated size was smaller than the ringbuf size, allowing an attacker to perform out-of-bounds writes within the kernel and therefore, arbitrary code execution. This issue was fixed via commit 4b81ccebaeee (\"bpf, ringbuf: Deny reserve of buffers larger than ringbuf\") (v5.13-rc4) and backported to the stable kernels in v5.12.4, v5.11.21, and v5.10.37. It was introduced via 457f44363a88 (\"bpf: Implement BPF ring buffer and verifier support for it\") (v5.8-rc1)."
        },
        {
          "lang": "es",
          "value": "La funci\u00f3n eBPF RINGBUF bpf_ringbuf_reserve() del kernel de Linux no comprobaba que el tama\u00f1o asignado fuera menor que el tama\u00f1o del ringbuf, lo que permit\u00eda a un atacante realizar escrituras fuera de los l\u00edmites del kernel y, por tanto, la ejecuci\u00f3n de c\u00f3digo arbitrario. Este problema se solucion\u00f3 a trav\u00e9s del commit 4b81ccebaeee (\"bpf, ringbuf: Deny reserve of buffers larger than ringbuf\") (v5.13-rc4) y se retroaliment\u00f3 a los kernels estables en versiones v5.12.4, v5.11.21 y v5.10.37. Se introdujo a trav\u00e9s de 457f44363a88 (\"bpf: Implementar b\u00fafer de anillo BPF y soporte de verificador para ello\") (v5.8-rc1)"
        }
      ],
      "id": "CVE-2021-3489",
      "lastModified": "2024-11-21T06:21:39.733",
      "metrics": {
        "cvssMetricV2": [
          {
            "acInsufInfo": false,
            "baseSeverity": "HIGH",
            "cvssData": {
              "accessComplexity": "LOW",
              "accessVector": "LOCAL",
              "authentication": "NONE",
              "availabilityImpact": "COMPLETE",
              "baseScore": 7.2,
              "confidentialityImpact": "COMPLETE",
              "integrityImpact": "COMPLETE",
              "vectorString": "AV:L/AC:L/Au:N/C:C/I:C/A:C",
              "version": "2.0"
            },
            "exploitabilityScore": 3.9,
            "impactScore": 10.0,
            "obtainAllPrivilege": false,
            "obtainOtherPrivilege": false,
            "obtainUserPrivilege": false,
            "source": "nvd@nist.gov",
            "type": "Primary",
            "userInteractionRequired": false
          }
        ],
        "cvssMetricV31": [
          {
            "cvssData": {
              "attackComplexity": "HIGH",
              "attackVector": "LOCAL",
              "availabilityImpact": "HIGH",
              "baseScore": 7.8,
              "baseSeverity": "HIGH",
              "confidentialityImpact": "HIGH",
              "integrityImpact": "HIGH",
              "privilegesRequired": "LOW",
              "scope": "CHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H",
              "version": "3.1"
            },
            "exploitabilityScore": 1.1,
            "impactScore": 6.0,
            "source": "security@ubuntu.com",
            "type": "Secondary"
          },
          {
            "cvssData": {
              "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"
            },
            "exploitabilityScore": 1.8,
            "impactScore": 5.9,
            "source": "nvd@nist.gov",
            "type": "Primary"
          }
        ]
      },
      "published": "2021-06-04T02:15:07.047",
      "references": [
        {
          "source": "security@ubuntu.com",
          "tags": [
            "Patch",
            "Vendor Advisory"
          ],
          "url": "https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf.git/commit/?id=4b81ccebaeee885ab1aa1438133f2991e3a2b6ea"
        },
        {
          "source": "security@ubuntu.com",
          "tags": [
            "Third Party Advisory"
          ],
          "url": "https://security.netapp.com/advisory/ntap-20210716-0004/"
        },
        {
          "source": "security@ubuntu.com",
          "tags": [
            "Third Party Advisory"
          ],
          "url": "https://ubuntu.com/security/notices/USN-4949-1"
        },
        {
          "source": "security@ubuntu.com",
          "tags": [
            "Third Party Advisory"
          ],
          "url": "https://ubuntu.com/security/notices/USN-4950-1"
        },
        {
          "source": "security@ubuntu.com",
          "tags": [
            "Mailing List",
            "Third Party Advisory"
          ],
          "url": "https://www.openwall.com/lists/oss-security/2021/05/11/10"
        },
        {
          "source": "security@ubuntu.com",
          "tags": [
            "Third Party Advisory",
            "VDB Entry"
          ],
          "url": "https://www.zerodayinitiative.com/advisories/ZDI-21-590/"
        },
        {
          "source": "af854a3a-2127-422b-91ae-364da2661108",
          "tags": [
            "Patch",
            "Vendor Advisory"
          ],
          "url": "https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf.git/commit/?id=4b81ccebaeee885ab1aa1438133f2991e3a2b6ea"
        },
        {
          "source": "af854a3a-2127-422b-91ae-364da2661108",
          "tags": [
            "Third Party Advisory"
          ],
          "url": "https://security.netapp.com/advisory/ntap-20210716-0004/"
        },
        {
          "source": "af854a3a-2127-422b-91ae-364da2661108",
          "tags": [
            "Third Party Advisory"
          ],
          "url": "https://ubuntu.com/security/notices/USN-4949-1"
        },
        {
          "source": "af854a3a-2127-422b-91ae-364da2661108",
          "tags": [
            "Third Party Advisory"
          ],
          "url": "https://ubuntu.com/security/notices/USN-4950-1"
        },
        {
          "source": "af854a3a-2127-422b-91ae-364da2661108",
          "tags": [
            "Mailing List",
            "Third Party Advisory"
          ],
          "url": "https://www.openwall.com/lists/oss-security/2021/05/11/10"
        },
        {
          "source": "af854a3a-2127-422b-91ae-364da2661108",
          "tags": [
            "Third Party Advisory",
            "VDB Entry"
          ],
          "url": "https://www.zerodayinitiative.com/advisories/ZDI-21-590/"
        }
      ],
      "sourceIdentifier": "security@ubuntu.com",
      "vulnStatus": "Modified",
      "weaknesses": [
        {
          "description": [
            {
              "lang": "en",
              "value": "CWE-119"
            },
            {
              "lang": "en",
              "value": "CWE-787"
            }
          ],
          "source": "security@ubuntu.com",
          "type": "Secondary"
        },
        {
          "description": [
            {
              "lang": "en",
              "value": "CWE-787"
            }
          ],
          "source": "nvd@nist.gov",
          "type": "Primary"
        }
      ]
    },
    "nvd": {
      "cve": {
        "configurations": [
          {
            "nodes": [
              {
                "cpeMatch": [
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "CD2F1C00-3D81-452B-AE61-0B2C1A536A1D",
                    "versionEndExcluding": "5.10.37",
                    "versionStartIncluding": "5.8",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "8CBB94EC-EC33-4464-99C5-03E5542715F0",
                    "versionEndExcluding": "5.11.21",
                    "versionStartIncluding": "5.11",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "D8C7052F-1B7B-4327-9C2B-84EBF3243838",
                    "versionEndExcluding": "5.12.4",
                    "versionStartIncluding": "5.12",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:5.13:-:*:*:*:*:*:*",
                    "matchCriteriaId": "8F0E7012-0BA3-4E6A-ADE9-57973CBDEE28",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:5.13:rc1:*:*:*:*:*:*",
                    "matchCriteriaId": "0CBAD0FC-C281-4666-AB2F-F8E6E1165DF7",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:5.13:rc2:*:*:*:*:*:*",
                    "matchCriteriaId": "96AC23B2-D46A-49D9-8203-8E1BEDCA8532",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:5.13:rc3:*:*:*:*:*:*",
                    "matchCriteriaId": "DA610E30-717C-4700-9F77-A3C9244F3BFD",
                    "vulnerable": true
                  }
                ],
                "negate": false,
                "operator": "OR"
              }
            ]
          },
          {
            "nodes": [
              {
                "cpeMatch": [
                  {
                    "criteria": "cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:*",
                    "matchCriteriaId": "902B8056-9E37-443B-8905-8AA93E2447FB",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:canonical:ubuntu_linux:20.10:*:*:*:*:*:*:*",
                    "matchCriteriaId": "338B3AAC-C147-4A31-95E7-6E8A6FB4B3FC",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:canonical:ubuntu_linux:21.04:*:*:*:*:*:*:*",
                    "matchCriteriaId": "8EF1C1CC-3FAE-4DE3-BC41-E5B14D5721F4",
                    "vulnerable": true
                  }
                ],
                "negate": false,
                "operator": "OR"
              }
            ]
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "The eBPF RINGBUF bpf_ringbuf_reserve() function in the Linux kernel did not check that the allocated size was smaller than the ringbuf size, allowing an attacker to perform out-of-bounds writes within the kernel and therefore, arbitrary code execution. This issue was fixed via commit 4b81ccebaeee (\"bpf, ringbuf: Deny reserve of buffers larger than ringbuf\") (v5.13-rc4) and backported to the stable kernels in v5.12.4, v5.11.21, and v5.10.37. It was introduced via 457f44363a88 (\"bpf: Implement BPF ring buffer and verifier support for it\") (v5.8-rc1)."
          },
          {
            "lang": "es",
            "value": "La funci\u00f3n eBPF RINGBUF bpf_ringbuf_reserve() del kernel de Linux no comprobaba que el tama\u00f1o asignado fuera menor que el tama\u00f1o del ringbuf, lo que permit\u00eda a un atacante realizar escrituras fuera de los l\u00edmites del kernel y, por tanto, la ejecuci\u00f3n de c\u00f3digo arbitrario. Este problema se solucion\u00f3 a trav\u00e9s del commit 4b81ccebaeee (\"bpf, ringbuf: Deny reserve of buffers larger than ringbuf\") (v5.13-rc4) y se retroaliment\u00f3 a los kernels estables en versiones v5.12.4, v5.11.21 y v5.10.37. Se introdujo a trav\u00e9s de 457f44363a88 (\"bpf: Implementar b\u00fafer de anillo BPF y soporte de verificador para ello\") (v5.8-rc1)"
          }
        ],
        "id": "CVE-2021-3489",
        "lastModified": "2024-11-21T06:21:39.733",
        "metrics": {
          "cvssMetricV2": [
            {
              "acInsufInfo": false,
              "baseSeverity": "HIGH",
              "cvssData": {
                "accessComplexity": "LOW",
                "accessVector": "LOCAL",
                "authentication": "NONE",
                "availabilityImpact": "COMPLETE",
                "baseScore": 7.2,
                "confidentialityImpact": "COMPLETE",
                "integrityImpact": "COMPLETE",
                "vectorString": "AV:L/AC:L/Au:N/C:C/I:C/A:C",
                "version": "2.0"
              },
              "exploitabilityScore": 3.9,
              "impactScore": 10.0,
              "obtainAllPrivilege": false,
              "obtainOtherPrivilege": false,
              "obtainUserPrivilege": false,
              "source": "nvd@nist.gov",
              "type": "Primary",
              "userInteractionRequired": false
            }
          ],
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "HIGH",
                "attackVector": "LOCAL",
                "availabilityImpact": "HIGH",
                "baseScore": 7.8,
                "baseSeverity": "HIGH",
                "confidentialityImpact": "HIGH",
                "integrityImpact": "HIGH",
                "privilegesRequired": "LOW",
                "scope": "CHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H",
                "version": "3.1"
              },
              "exploitabilityScore": 1.1,
              "impactScore": 6.0,
              "source": "security@ubuntu.com",
              "type": "Secondary"
            },
            {
              "cvssData": {
                "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"
              },
              "exploitabilityScore": 1.8,
              "impactScore": 5.9,
              "source": "nvd@nist.gov",
              "type": "Primary"
            }
          ]
        },
        "published": "2021-06-04T02:15:07.047",
        "references": [
          {
            "source": "security@ubuntu.com",
            "tags": [
              "Patch",
              "Vendor Advisory"
            ],
            "url": "https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf.git/commit/?id=4b81ccebaeee885ab1aa1438133f2991e3a2b6ea"
          },
          {
            "source": "security@ubuntu.com",
            "tags": [
              "Third Party Advisory"
            ],
            "url": "https://security.netapp.com/advisory/ntap-20210716-0004/"
          },
          {
            "source": "security@ubuntu.com",
            "tags": [
              "Third Party Advisory"
            ],
            "url": "https://ubuntu.com/security/notices/USN-4949-1"
          },
          {
            "source": "security@ubuntu.com",
            "tags": [
              "Third Party Advisory"
            ],
            "url": "https://ubuntu.com/security/notices/USN-4950-1"
          },
          {
            "source": "security@ubuntu.com",
            "tags": [
              "Mailing List",
              "Third Party Advisory"
            ],
            "url": "https://www.openwall.com/lists/oss-security/2021/05/11/10"
          },
          {
            "source": "security@ubuntu.com",
            "tags": [
              "Third Party Advisory",
              "VDB Entry"
            ],
            "url": "https://www.zerodayinitiative.com/advisories/ZDI-21-590/"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Patch",
              "Vendor Advisory"
            ],
            "url": "https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf.git/commit/?id=4b81ccebaeee885ab1aa1438133f2991e3a2b6ea"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Third Party Advisory"
            ],
            "url": "https://security.netapp.com/advisory/ntap-20210716-0004/"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Third Party Advisory"
            ],
            "url": "https://ubuntu.com/security/notices/USN-4949-1"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Third Party Advisory"
            ],
            "url": "https://ubuntu.com/security/notices/USN-4950-1"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Mailing List",
              "Third Party Advisory"
            ],
            "url": "https://www.openwall.com/lists/oss-security/2021/05/11/10"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Third Party Advisory",
              "VDB Entry"
            ],
            "url": "https://www.zerodayinitiative.com/advisories/ZDI-21-590/"
          }
        ],
        "sourceIdentifier": "security@ubuntu.com",
        "vulnStatus": "Modified",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-119"
              },
              {
                "lang": "en",
                "value": "CWE-787"
              }
            ],
            "source": "security@ubuntu.com",
            "type": "Secondary"
          },
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-787"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          }
        ]
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-08-14T06:59:58+00:00",
      "cve": "CVE-2021-3489",
      "id": "CVE-2021-3489",
      "initial_release_date": "2021-05-11T00:00:00+00:00",
      "product_status:fixed": "150",
      "product_status:known_not_affected": "149",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: Linux kernel eBPF RINGBUF map oversized allocation",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2021/cve-2021-3489.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "important",
      "current_release_date": "2026-10-17T01:42:43Z",
      "cve": "CVE-2021-3489",
      "id": "CVE-2021-3489",
      "initial_release_date": "2023-02-15T03:49:23Z",
      "product_status:known_affected": "322",
      "product_status:known_not_affected": "346",
      "product_status:recommended": "754",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2021-3489",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/2023/cve-2021-3489.json",
      "version": "44"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.

Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

JSON

Loading timeline…




    Related by attack behaviour

    Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.