Vulnerability-Lookup

ubuntu-cve-2025-7519

Vulnerability from osv_ubuntu

Published

2025-07-14 14:15

Modified

2026-04-22 07:53

Summary

Details

A flaw was found in polkit. When processing an XML policy with 32 or more nested elements in depth, an out-of-bounds write can be triggered. This issue can lead to a crash or other unexpected behavior, and arbitrary code execution is not discarded. To exploit this flaw, a high-privilege account is needed as it's required to place the malicious policy file properly.

Severity

6.7 (Medium)


                    
                      CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

N/A (UNKNOWN)

low

References

URL

Type

	https://ubuntu.com/security/CVE-2025-7519	REPORT
	https://www.cve.org/CVERecord?id=CVE-2025-7519	REPORT
	https://access.redhat.com/security/cve/CVE-2025-7519	REPORT
	https://ubuntu.com/security/notices/USN-8173-1	ADVISORY

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "gir1.2-polkit-1.0",
            "binary_version": "0.105-4ubuntu3.14.04.6+esm1"
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          {
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            "binary_version": "0.105-4ubuntu3.14.04.6+esm1"
          }
        ],
        "priority_reason": "Root privileges are required to exploit this issue"
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:14.04:LTS",
        "name": "policykit-1",
        "purl": "pkg:deb/ubuntu/policykit-1@0.105-4ubuntu3.14.04.6+esm1?arch=source\u0026distro=esm-infra-legacy/trusty"
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        ],
        "priority_reason": "Root privileges are required to exploit this issue"
      },
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "policykit-1",
        "purl": "pkg:deb/ubuntu/policykit-1@0.105-20ubuntu0.18.04.6?arch=source\u0026distro=bionic"
      },
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        "0.105-20ubuntu0.18.04.1",
        "0.105-20ubuntu0.18.04.4",
        "0.105-20ubuntu0.18.04.5",
        "0.105-20ubuntu0.18.04.6"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
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            "binary_name": "gir1.2-polkit-1.0",
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          {
            "binary_name": "libpolkit-agent-1-0",
            "binary_version": "0.105-26ubuntu1.3"
          },
          {
            "binary_name": "libpolkit-gobject-1-0",
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          {
            "binary_name": "policykit-1",
            "binary_version": "0.105-26ubuntu1.3"
          }
        ],
        "priority_reason": "Root privileges are required to exploit this issue"
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "policykit-1",
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      },
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        "0.105-26ubuntu1.1",
        "0.105-26ubuntu1.2",
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    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "gir1.2-polkit-1.0",
            "binary_version": "0.105-33ubuntu0.1"
          },
          {
            "binary_name": "libpolkit-agent-1-0",
            "binary_version": "0.105-33ubuntu0.1"
          },
          {
            "binary_name": "libpolkit-gobject-1-0",
            "binary_version": "0.105-33ubuntu0.1"
          },
          {
            "binary_name": "pkexec",
            "binary_version": "0.105-33ubuntu0.1"
          },
          {
            "binary_name": "policykit-1",
            "binary_version": "0.105-33ubuntu0.1"
          },
          {
            "binary_name": "polkitd",
            "binary_version": "0.105-33ubuntu0.1"
          }
        ],
        "priority_reason": "Root privileges are required to exploit this issue"
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "policykit-1",
        "purl": "pkg:deb/ubuntu/policykit-1@0.105-33ubuntu0.1?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.105-33ubuntu0.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.105-31",
        "0.105-31ubuntu1",
        "0.105-31.1",
        "0.105-32",
        "0.105-33"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "gir1.2-polkit-1.0",
            "binary_version": "124-2ubuntu1.24.04.3"
          },
          {
            "binary_name": "libpolkit-agent-1-0",
            "binary_version": "124-2ubuntu1.24.04.3"
          },
          {
            "binary_name": "libpolkit-gobject-1-0",
            "binary_version": "124-2ubuntu1.24.04.3"
          },
          {
            "binary_name": "pkexec",
            "binary_version": "124-2ubuntu1.24.04.3"
          },
          {
            "binary_name": "policykit-1",
            "binary_version": "124-2ubuntu1.24.04.3"
          },
          {
            "binary_name": "polkitd",
            "binary_version": "124-2ubuntu1.24.04.3"
          },
          {
            "binary_name": "polkitd-pkla",
            "binary_version": "124-2ubuntu1.24.04.3"
          }
        ],
        "priority_reason": "Root privileges are required to exploit this issue"
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "policykit-1",
        "purl": "pkg:deb/ubuntu/policykit-1@124-2ubuntu1.24.04.3?arch=source\u0026distro=noble"
      },
      "ranges": [
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            }
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        "124-1",
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        "124-2ubuntu1",
        "124-2ubuntu1.24.04.2"
      ]
    },
    {
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          },
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          },
          {
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            "binary_version": "126-2ubuntu0.1"
          }
        ],
        "priority_reason": "Root privileges are required to exploit this issue"
      },
      "package": {
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      },
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        }
      ],
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      ]
    }
  ],
  "aliases": [],
  "details": "A flaw was found in polkit. When processing an XML policy with 32 or more nested elements in depth, an out-of-bounds write can be triggered. This issue can lead to a crash or other unexpected behavior, and arbitrary code execution is not discarded. To exploit this flaw, a high-privilege account is needed as it\u0027s required to place the malicious policy file properly.",
  "id": "UBUNTU-CVE-2025-7519",
  "modified": "2026-04-22T07:53:19Z",
  "published": "2025-07-14T14:15:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2025-7519"
    },
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      "url": "https://www.cve.org/CVERecord?id=CVE-2025-7519"
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    },
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  "schema_version": "1.7.0",
  "severity": [
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      "type": "CVSS_V3"
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  ],
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}

CVE-2025-7519 (GCVE-0-2025-7519)

Vulnerability from cvelistv5 – Published: 2025-07-14 13:35 – Updated: 2026-09-01 11:51

Title

Polkit: xml policy file with a large number of nested elements may lead to out-of-bounds write

Summary

Severity

6.7 (Medium)


                        
                          CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-07-16 03:56 UTC

CWE

CWE-787 - Out-of-bounds Write

Assigner

redhat redhat root

References

4 references

URL	Tags
https://access.redhat.com/security/cve/CVE-2025-7519	vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2379675	issue-trackingx_refsource_REDHAT
https://github.com/polkit-org/polkit/commit/107d3…
https://github.com/polkit-org/polkit/pull/570

Impacted products

7 products

Vendor	Product	Version
		Affected: 0 , ≤ 126 (custom)
Red Hat	Red Hat Enterprise Linux 10	cpe:/o:redhat:enterprise_linux:10
Red Hat	Red Hat Enterprise Linux 6	cpe:/o:redhat:enterprise_linux:6
Red Hat	Red Hat Enterprise Linux 7	cpe:/o:redhat:enterprise_linux:7
Red Hat	Red Hat Enterprise Linux 8	cpe:/o:redhat:enterprise_linux:8
Red Hat	Red Hat Enterprise Linux 9	cpe:/o:redhat:enterprise_linux:9
Red Hat	Red Hat OpenShift Container Platform 4	cpe:/a:redhat:openshift:4

Date Public

2025-07-11 00:00

Credits

Red Hat would like to thank Mohamed Maatallah (Independent security researcher) for reporting this issue.

Show details on NVD website

JSON

To clipboard

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usn-8173-1

Vulnerability from osv_ubuntu

Published

2026-04-14 08:02

Modified

2026-04-27 14:11

Summary

policykit-1 vulnerabilities

Details

It was discovered that polkit incorrectly handled nested elements in XML policy files. If an administrator were tricked into installing a malicious policy file, a remote attacker could possibly use this issue to cause polkit to crash, resulting in a denial of service. (CVE-2025-7519)

Pavel Kohout discovered that the polkit polkit-agent-helper-1 utility incorrectly handled long input. A local attacker could possibly use this issue to cause polkit to crash, resulting in a denial of service. (CVE-2026-4897)

References

URL

Type

	https://ubuntu.com/security/notices/USN-8173-1	ADVISORY
	https://ubuntu.com/security/CVE-2025-7519	REPORT
	https://ubuntu.com/security/CVE-2026-4897	REPORT

JSON

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{
  "affected": [
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2025-7519",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "low",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-4897",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:22.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "gir1.2-polkit-1.0",
            "binary_version": "0.105-33ubuntu0.1"
          },
          {
            "binary_name": "libpolkit-agent-1-0",
            "binary_version": "0.105-33ubuntu0.1"
          },
          {
            "binary_name": "libpolkit-gobject-1-0",
            "binary_version": "0.105-33ubuntu0.1"
          },
          {
            "binary_name": "pkexec",
            "binary_version": "0.105-33ubuntu0.1"
          },
          {
            "binary_name": "policykit-1",
            "binary_version": "0.105-33ubuntu0.1"
          },
          {
            "binary_name": "polkitd",
            "binary_version": "0.105-33ubuntu0.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "policykit-1",
        "purl": "pkg:deb/ubuntu/policykit-1@0.105-33ubuntu0.1?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.105-33ubuntu0.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.105-31",
        "0.105-31ubuntu1",
        "0.105-31.1",
        "0.105-32",
        "0.105-33"
      ]
    },
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2025-7519",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "low",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-4897",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:24.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "gir1.2-polkit-1.0",
            "binary_version": "124-2ubuntu1.24.04.3"
          },
          {
            "binary_name": "libpolkit-agent-1-0",
            "binary_version": "124-2ubuntu1.24.04.3"
          },
          {
            "binary_name": "libpolkit-gobject-1-0",
            "binary_version": "124-2ubuntu1.24.04.3"
          },
          {
            "binary_name": "pkexec",
            "binary_version": "124-2ubuntu1.24.04.3"
          },
          {
            "binary_name": "policykit-1",
            "binary_version": "124-2ubuntu1.24.04.3"
          },
          {
            "binary_name": "polkitd",
            "binary_version": "124-2ubuntu1.24.04.3"
          },
          {
            "binary_name": "polkitd-pkla",
            "binary_version": "124-2ubuntu1.24.04.3"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "policykit-1",
        "purl": "pkg:deb/ubuntu/policykit-1@124-2ubuntu1.24.04.3?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "124-2ubuntu1.24.04.3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "123-1",
        "123-3",
        "124-1",
        "124-1ubuntu1",
        "124-2ubuntu1",
        "124-2ubuntu1.24.04.2"
      ]
    },
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2025-7519",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "low",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-4897",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:25.10"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "gir1.2-polkit-1.0",
            "binary_version": "126-2ubuntu0.1"
          },
          {
            "binary_name": "libpolkit-agent-1-0",
            "binary_version": "126-2ubuntu0.1"
          },
          {
            "binary_name": "libpolkit-gobject-1-0",
            "binary_version": "126-2ubuntu0.1"
          },
          {
            "binary_name": "pkexec",
            "binary_version": "126-2ubuntu0.1"
          },
          {
            "binary_name": "polkitd",
            "binary_version": "126-2ubuntu0.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:25.10",
        "name": "policykit-1",
        "purl": "pkg:deb/ubuntu/policykit-1@126-2ubuntu0.1?arch=source\u0026distro=questing"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "126-2ubuntu0.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "126-2"
      ]
    }
  ],
  "aliases": [],
  "details": "It was discovered that polkit incorrectly handled nested elements in XML\npolicy files. If an administrator were tricked into installing a malicious\npolicy file, a remote attacker could possibly use this issue to cause\npolkit to crash, resulting in a denial of service. (CVE-2025-7519)\n\nPavel Kohout discovered that the polkit polkit-agent-helper-1 utility\nincorrectly handled long input. A local attacker could possibly use this\nissue to cause polkit to crash, resulting in a denial of service.\n(CVE-2026-4897)",
  "id": "USN-8173-1",
  "modified": "2026-04-27T14:11:51Z",
  "published": "2026-04-14T08:02:28Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-8173-1"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2025-7519"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-4897"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "summary": "policykit-1 vulnerabilities",
  "upstream": [
    "UBUNTU-CVE-2025-7519",
    "UBUNTU-CVE-2026-4897"
  ]
}

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.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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.

Action not permitted

ubuntu-cve-2025-7519

Vulnerability from osv_ubuntu

CVE-2025-7519 (GCVE-0-2025-7519)

usn-8173-1

Vulnerability from osv_ubuntu

Tags

Sightings

Nomenclature

Related by attack behaviour