ubuntu-cve-2025-6966
Vulnerability from osv_ubuntu
Published
2025-12-05 00:00
Modified
2026-04-22 07:53
Summary
Details

NULL pointer dereference in TagSection.keys() in python-apt on APT-based Linux systems allows a local attacker to cause a denial of service (process crash) via a crafted deb822 file with a malformed non-UTF-8 key.

Severity
6.9 (Medium)
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
6.2 (Medium)
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
N/A (UNKNOWN)
medium
References
To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "python-apt",
            "binary_version": "0.9.3.5ubuntu3+esm5"
          },
          {
            "binary_name": "python-apt-common",
            "binary_version": "0.9.3.5ubuntu3+esm5"
          },
          {
            "binary_name": "python3-apt",
            "binary_version": "0.9.3.5ubuntu3+esm5"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:14.04:LTS",
        "name": "python-apt",
        "purl": "pkg:deb/ubuntu/python-apt@0.9.3.5ubuntu3+esm5?arch=source\u0026distro=esm-infra-legacy/trusty"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.9.3.5ubuntu3+esm5"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.8.9.1ubuntu1",
        "0.9.0",
        "0.9.1",
        "0.9.1ubuntu1",
        "0.9.3.2",
        "0.9.3.2ubuntu2",
        "0.9.3.3",
        "0.9.3.3ubuntu1",
        "0.9.3.4",
        "0.9.3.4build1",
        "0.9.3.5",
        "0.9.3.5ubuntu1",
        "0.9.3.5ubuntu2",
        "0.9.3.5ubuntu3",
        "0.9.3.5ubuntu3+esm2",
        "0.9.3.5ubuntu3+esm4"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "python-apt",
            "binary_version": "1.1.0~beta1ubuntu0.16.04.12+esm1"
          },
          {
            "binary_name": "python-apt-common",
            "binary_version": "1.1.0~beta1ubuntu0.16.04.12+esm1"
          },
          {
            "binary_name": "python3-apt",
            "binary_version": "1.1.0~beta1ubuntu0.16.04.12+esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:16.04:LTS",
        "name": "python-apt",
        "purl": "pkg:deb/ubuntu/python-apt@1.1.0~beta1ubuntu0.16.04.12+esm1?arch=source\u0026distro=esm-infra/xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.1.0~beta1ubuntu0.16.04.12+esm1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.0.1build1",
        "1.0.1ubuntu2",
        "1.1.0~beta1",
        "1.1.0~beta1build1",
        "1.1.0~beta1ubuntu0.16.04.1",
        "1.1.0~beta1ubuntu0.16.04.2",
        "1.1.0~beta1ubuntu0.16.04.4",
        "1.1.0~beta1ubuntu0.16.04.5",
        "1.1.0~beta1ubuntu0.16.04.7",
        "1.1.0~beta1ubuntu0.16.04.8",
        "1.1.0~beta1ubuntu0.16.04.9",
        "1.1.0~beta1ubuntu0.16.04.10",
        "1.1.0~beta1ubuntu0.16.04.11",
        "1.1.0~beta1ubuntu0.16.04.12"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "python-apt",
            "binary_version": "1.6.6ubuntu0.1~esm1"
          },
          {
            "binary_name": "python-apt-common",
            "binary_version": "1.6.6ubuntu0.1~esm1"
          },
          {
            "binary_name": "python3-apt",
            "binary_version": "1.6.6ubuntu0.1~esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:18.04:LTS",
        "name": "python-apt",
        "purl": "pkg:deb/ubuntu/python-apt@1.6.6ubuntu0.1~esm1?arch=source\u0026distro=esm-infra/bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.6.6ubuntu0.1~esm1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.4.0~beta3build2",
        "1.4.0~beta3ubuntu1",
        "1.6.0~rc2ubuntu1",
        "1.6.0~rc2ubuntu2",
        "1.6.0",
        "1.6.1",
        "1.6.2",
        "1.6.3",
        "1.6.3ubuntu1",
        "1.6.4",
        "1.6.5ubuntu0.1",
        "1.6.5ubuntu0.2",
        "1.6.5ubuntu0.3",
        "1.6.5ubuntu0.4",
        "1.6.5ubuntu0.5",
        "1.6.5ubuntu0.6",
        "1.6.5ubuntu0.7",
        "1.6.6"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "python-apt",
            "binary_version": "2.0.1ubuntu0.20.04.1+esm1"
          },
          {
            "binary_name": "python-apt-common",
            "binary_version": "2.0.1ubuntu0.20.04.1+esm1"
          },
          {
            "binary_name": "python3-apt",
            "binary_version": "2.0.1ubuntu0.20.04.1+esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:20.04:LTS",
        "name": "python-apt",
        "purl": "pkg:deb/ubuntu/python-apt@2.0.1ubuntu0.20.04.1+esm1?arch=source\u0026distro=esm-infra/focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.0.1ubuntu0.20.04.1+esm1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.9.0ubuntu1",
        "1.9.0ubuntu3",
        "1.9.0ubuntu5",
        "1.9.3ubuntu2",
        "1.9.5",
        "1.9.5build1",
        "1.9.7",
        "1.9.8",
        "1.9.10",
        "2.0.0",
        "2.0.0ubuntu0.20.04.1",
        "2.0.0ubuntu0.20.04.2",
        "2.0.0ubuntu0.20.04.3",
        "2.0.0ubuntu0.20.04.4",
        "2.0.0ubuntu0.20.04.5",
        "2.0.0ubuntu0.20.04.6",
        "2.0.0ubuntu0.20.04.7",
        "2.0.0ubuntu0.20.04.8",
        "2.0.1",
        "2.0.1ubuntu0.20.04.1"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "python-apt-common",
            "binary_version": "2.4.0ubuntu4.1"
          },
          {
            "binary_name": "python3-apt",
            "binary_version": "2.4.0ubuntu4.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "python-apt",
        "purl": "pkg:deb/ubuntu/python-apt@2.4.0ubuntu4.1?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.4.0ubuntu4.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.2.1",
        "2.3.0",
        "2.3.0ubuntu1",
        "2.3.0ubuntu2",
        "2.3.0ubuntu2.1",
        "2.4.0",
        "2.4.0ubuntu1",
        "2.4.0ubuntu2",
        "2.4.0ubuntu3",
        "2.4.0ubuntu4"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "python-apt-common",
            "binary_version": "2.7.7ubuntu5.1"
          },
          {
            "binary_name": "python3-apt",
            "binary_version": "2.7.7ubuntu5.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "python-apt",
        "purl": "pkg:deb/ubuntu/python-apt@2.7.7ubuntu5.1?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.7.7ubuntu5.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.6.0ubuntu1",
        "2.6.0ubuntu2",
        "2.7.0",
        "2.7.5",
        "2.7.6",
        "2.7.7",
        "2.7.7build1",
        "2.7.7ubuntu1",
        "2.7.7ubuntu2",
        "2.7.7ubuntu3",
        "2.7.7ubuntu4",
        "2.7.7ubuntu5"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "python-apt-common",
            "binary_version": "3.0.0ubuntu1.1"
          },
          {
            "binary_name": "python3-apt",
            "binary_version": "3.0.0ubuntu1.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:25.10",
        "name": "python-apt",
        "purl": "pkg:deb/ubuntu/python-apt@3.0.0ubuntu1.1?arch=source\u0026distro=questing"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.0.0ubuntu1.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.0.0",
        "3.0.0ubuntu1"
      ]
    }
  ],
  "aliases": [],
  "details": "NULL pointer dereference in TagSection.keys() in python-apt on APT-based Linux systems allows a local attacker to cause a denial of service (process crash) via a crafted deb822 file with a malformed non-UTF-8 key.",
  "id": "UBUNTU-CVE-2025-6966",
  "modified": "2026-04-22T07:53:19Z",
  "published": "2025-12-05T00:00:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2025-6966"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2025-6966"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-7916-1"
    }
  ],
  "related": [
    "USN-7916-1"
  ],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    },
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2025-6966"
  ]
}



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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

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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.
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  • 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.