USN-7954-1 (UBUNTU-CVE-2021-46848)

Vulnerability from osv_ubuntu – Published: 2026-01-12 13:52 – Updated: 2026-04-22 07:37 – Source website
VLAI
Summary
libtasn1-6 vulnerabilities
Details

It was discovered that Libtasn1 incorrectly handled decoding ASN.1 content. An attacker could possibly use this issue to cause Libtasn1 to crash, resulting in a denial of service. (CVE-2025-13151)

It was discovered that Libtasn1 incorrectly handled encoding ASN.1 content. An attacker could possibly use this issue to cause Libtasn1 to crash, resulting in a denial of service. This issue only affected Ubuntu 22.04 LTS. (CVE-2021-46848)

References
To clipboard 

{
  "affected": [
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2021-46848",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "low",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2025-13151",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/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": "libtasn1-6",
            "binary_version": "4.18.0-4ubuntu0.2"
          },
          {
            "binary_name": "libtasn1-bin",
            "binary_version": "4.18.0-4ubuntu0.2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "libtasn1-6",
        "purl": "pkg:deb/ubuntu/libtasn1-6@4.18.0-4ubuntu0.2?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "4.18.0-4ubuntu0.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "4.16.0-2",
        "4.16.0-2build1",
        "4.17.0-2",
        "4.18.0-3",
        "4.18.0-4",
        "4.18.0-4build1",
        "4.18.0-4ubuntu0.1"
      ]
    },
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2025-13151",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/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": "libtasn1-6",
            "binary_version": "4.19.0-3ubuntu0.24.04.2"
          },
          {
            "binary_name": "libtasn1-bin",
            "binary_version": "4.19.0-3ubuntu0.24.04.2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "libtasn1-6",
        "purl": "pkg:deb/ubuntu/libtasn1-6@4.19.0-3ubuntu0.24.04.2?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "4.19.0-3ubuntu0.24.04.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "4.19.0-3",
        "4.19.0-3build1",
        "4.19.0-3ubuntu0.24.04.1"
      ]
    },
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2025-13151",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/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": "libtasn1-6",
            "binary_version": "4.20.0-2ubuntu0.25.10.1"
          },
          {
            "binary_name": "libtasn1-bin",
            "binary_version": "4.20.0-2ubuntu0.25.10.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:25.10",
        "name": "libtasn1-6",
        "purl": "pkg:deb/ubuntu/libtasn1-6@4.20.0-2ubuntu0.25.10.1?arch=source\u0026distro=questing"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "4.20.0-2ubuntu0.25.10.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "4.20.0-2",
        "4.20.0-2build1"
      ]
    }
  ],
  "aliases": [],
  "details": "It was discovered that Libtasn1 incorrectly handled decoding ASN.1 content.\nAn attacker could possibly use this issue to cause Libtasn1 to crash,\nresulting in a denial of service. (CVE-2025-13151)\n\nIt was discovered that Libtasn1 incorrectly handled encoding ASN.1 content.\nAn attacker could possibly use this issue to cause Libtasn1 to crash,\nresulting in a denial of service. This issue only affected Ubuntu 22.04\nLTS. (CVE-2021-46848)",
  "id": "USN-7954-1",
  "modified": "2026-04-22T07:37:26Z",
  "published": "2026-01-12T13:52:51Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-7954-1"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2021-46848"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2025-13151"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "summary": "libtasn1-6 vulnerabilities",
  "upstream": [
    "UBUNTU-CVE-2021-46848",
    "UBUNTU-CVE-2025-13151"
  ]
}



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