USN-8043-1 (UBUNTU-CVE-2025-9820)

Vulnerability from osv_ubuntu – Published: 2026-02-16 13:53 – Updated: 2026-04-27 14:11 – Source website
VLAI
Summary
gnutls28 vulnerabilities
Details

Tim Scheckenbach discovered that GnuTLS incorrectly handled malicious certificates containing a large number of name constraints and subject alternative names. A remote attacker could possibly use this issue to cause GnuTLS to consume resources, resulting in a denial of service. (CVE-2025-14831)

Luigino Camastra discovered that GnuTLS incorrectly handled certain PKCS11 token labels. A remote attacker could use this issue to cause GnuTLS to crash, resulting in a denial of service, or possibly execute arbitrary code. The default compiler options for affected releases should reduce the vulnerability to a denial of service. (CVE-2025-9820)

References
To clipboard 

{
  "affected": [
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2025-9820",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
                  "type": "CVSS_V3"
                },
                {
                  "score": "low",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2025-14831",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:22.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "gnutls-bin",
            "binary_version": "3.7.3-4ubuntu1.8"
          },
          {
            "binary_name": "guile-gnutls",
            "binary_version": "3.7.3-4ubuntu1.8"
          },
          {
            "binary_name": "libgnutls-dane0",
            "binary_version": "3.7.3-4ubuntu1.8"
          },
          {
            "binary_name": "libgnutls-openssl27",
            "binary_version": "3.7.3-4ubuntu1.8"
          },
          {
            "binary_name": "libgnutls30",
            "binary_version": "3.7.3-4ubuntu1.8"
          },
          {
            "binary_name": "libgnutlsxx28",
            "binary_version": "3.7.3-4ubuntu1.8"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "gnutls28",
        "purl": "pkg:deb/ubuntu/gnutls28@3.7.3-4ubuntu1.8?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.7.3-4ubuntu1.8"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.7.1-5ubuntu1",
        "3.7.2-2ubuntu1",
        "3.7.2-4ubuntu1",
        "3.7.2-5ubuntu1",
        "3.7.3-4ubuntu1",
        "3.7.3-4ubuntu1.1",
        "3.7.3-4ubuntu1.2",
        "3.7.3-4ubuntu1.3",
        "3.7.3-4ubuntu1.4",
        "3.7.3-4ubuntu1.5",
        "3.7.3-4ubuntu1.6",
        "3.7.3-4ubuntu1.7"
      ]
    },
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2025-9820",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
                  "type": "CVSS_V3"
                },
                {
                  "score": "low",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2025-14831",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:24.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "gnutls-bin",
            "binary_version": "3.8.3-1.1ubuntu3.5"
          },
          {
            "binary_name": "libgnutls-dane0t64",
            "binary_version": "3.8.3-1.1ubuntu3.5"
          },
          {
            "binary_name": "libgnutls-openssl27t64",
            "binary_version": "3.8.3-1.1ubuntu3.5"
          },
          {
            "binary_name": "libgnutls30t64",
            "binary_version": "3.8.3-1.1ubuntu3.5"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "gnutls28",
        "purl": "pkg:deb/ubuntu/gnutls28@3.8.3-1.1ubuntu3.5?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.8.3-1.1ubuntu3.5"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.8.1-4ubuntu1",
        "3.8.1-4ubuntu6",
        "3.8.1-4ubuntu7",
        "3.8.3-1ubuntu1",
        "3.8.3-1.1ubuntu2",
        "3.8.3-1.1ubuntu3",
        "3.8.3-1.1ubuntu3.1",
        "3.8.3-1.1ubuntu3.2",
        "3.8.3-1.1ubuntu3.3",
        "3.8.3-1.1ubuntu3.4"
      ]
    },
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2025-9820",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
                  "type": "CVSS_V3"
                },
                {
                  "score": "low",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2025-14831",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:25.10"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "gnutls-bin",
            "binary_version": "3.8.9-3ubuntu2.1"
          },
          {
            "binary_name": "libgnutls-dane0t64",
            "binary_version": "3.8.9-3ubuntu2.1"
          },
          {
            "binary_name": "libgnutls-openssl27t64",
            "binary_version": "3.8.9-3ubuntu2.1"
          },
          {
            "binary_name": "libgnutls30t64",
            "binary_version": "3.8.9-3ubuntu2.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:25.10",
        "name": "gnutls28",
        "purl": "pkg:deb/ubuntu/gnutls28@3.8.9-3ubuntu2.1?arch=source\u0026distro=questing"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.8.9-3ubuntu2.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.8.9-2ubuntu3",
        "3.8.9-3ubuntu1",
        "3.8.9-3ubuntu2"
      ]
    }
  ],
  "aliases": [],
  "details": "Tim Scheckenbach discovered that GnuTLS incorrectly handled malicious\ncertificates containing a large number of name constraints and subject\nalternative names. A remote attacker could possibly use this issue to\ncause GnuTLS to consume resources, resulting in a denial of service.\n(CVE-2025-14831)\n\nLuigino Camastra discovered that GnuTLS incorrectly handled certain PKCS11\ntoken labels. A remote attacker could use this issue to cause GnuTLS to\ncrash, resulting in a denial of service, or possibly execute arbitrary\ncode. The default compiler options for affected releases should reduce the\nvulnerability to a denial of service. (CVE-2025-9820)",
  "id": "USN-8043-1",
  "modified": "2026-04-27T14:11:49Z",
  "published": "2026-02-16T13:53:33Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-8043-1"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2025-9820"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2025-14831"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "summary": "gnutls28 vulnerabilities",
  "upstream": [
    "UBUNTU-CVE-2025-9820",
    "UBUNTU-CVE-2025-14831"
  ]
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





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.



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.