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
To clipboard 

{
  "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"
  ]
}



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