{"id":"USN-7954-1","summary":"libtasn1-6 vulnerabilities","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)","modified":"2026-02-10T04:50:47Z","published":"2026-01-12T13:52:51Z","related":["UBUNTU-CVE-2021-46848","UBUNTU-CVE-2025-13151"],"upstream":["CVE-2021-46848","CVE-2025-13151","UBUNTU-CVE-2021-46848","UBUNTU-CVE-2025-13151"],"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"}],"affected":[{"package":{"name":"libtasn1-6","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/libtasn1-6@4.18.0-4ubuntu0.2?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.18.0-4ubuntu0.2"}]}],"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"],"ecosystem_specific":{"binaries":[{"binary_version":"4.18.0-4ubuntu0.2","binary_name":"libtasn1-6"},{"binary_version":"4.18.0-4ubuntu0.2","binary_name":"libtasn1-6-dev"},{"binary_version":"4.18.0-4ubuntu0.2","binary_name":"libtasn1-bin"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-7954-1.json","cves_map":{"cves":[{"severity":[{"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":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H"},{"type":"Ubuntu","score":"low"}],"id":"CVE-2021-46848"},{"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"medium"}],"id":"CVE-2025-13151"}],"ecosystem":"Ubuntu:22.04:LTS"}}},{"package":{"name":"libtasn1-6","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/libtasn1-6@4.19.0-3ubuntu0.24.04.2?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.19.0-3ubuntu0.24.04.2"}]}],"versions":["4.19.0-3","4.19.0-3build1","4.19.0-3ubuntu0.24.04.1"],"ecosystem_specific":{"binaries":[{"binary_version":"4.19.0-3ubuntu0.24.04.2","binary_name":"libtasn1-6"},{"binary_version":"4.19.0-3ubuntu0.24.04.2","binary_name":"libtasn1-6-dev"},{"binary_version":"4.19.0-3ubuntu0.24.04.2","binary_name":"libtasn1-bin"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-7954-1.json","cves_map":{"cves":[{"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"medium"}],"id":"CVE-2025-13151"}],"ecosystem":"Ubuntu:24.04:LTS"}}},{"package":{"name":"libtasn1-6","ecosystem":"Ubuntu:25.10","purl":"pkg:deb/ubuntu/libtasn1-6@4.20.0-2ubuntu0.25.10.1?arch=source&distro=questing"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.20.0-2ubuntu0.25.10.1"}]}],"versions":["4.20.0-2","4.20.0-2build1"],"ecosystem_specific":{"binaries":[{"binary_version":"4.20.0-2ubuntu0.25.10.1","binary_name":"libtasn1-6"},{"binary_version":"4.20.0-2ubuntu0.25.10.1","binary_name":"libtasn1-6-dev"},{"binary_version":"4.20.0-2ubuntu0.25.10.1","binary_name":"libtasn1-bin"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-7954-1.json","cves_map":{"cves":[{"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"medium"}],"id":"CVE-2025-13151"}],"ecosystem":"Ubuntu:25.10"}}}],"schema_version":"1.7.3"}