{"id":"USN-7954-2","summary":"libtasn1-6 vulnerabilities","details":"USN-7954-1 fixed vulnerabilities in Libtasn1. This update provides the\ncorresponding updates for Ubuntu 14.04 LTS, Ubuntu 16.04 LTS, Ubuntu\n18.04 LTS, and Ubuntu 20.04 LTS. CVE-2021-46848 only affected Ubuntu\n14.04 LTS, Ubuntu 18.04 LTS, and Ubuntu 20.04 LTS.\n\nOriginal advisory details:\n\n It was discovered that Libtasn1 incorrectly handled decoding ASN.1\n content. An attacker could possibly use this issue to cause Libtasn1 to\n crash, resulting in a denial of service. (CVE-2025-13151)\n\n It was discovered that Libtasn1 incorrectly handled encoding ASN.1\n content. An attacker could possibly use this issue to cause Libtasn1 to\n crash, resulting in a denial of service. This issue only affected\n Ubuntu 22.04 LTS. (CVE-2021-46848)","modified":"2026-06-25T13:33:31.546853431Z","published":"2026-02-10T19:24:41Z","related":["UBUNTU-CVE-2021-46848","UBUNTU-CVE-2025-13151"],"upstream":["UBUNTU-CVE-2021-46848","UBUNTU-CVE-2025-13151"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-7954-2"},{"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:Pro:14.04:LTS","purl":"pkg:deb/ubuntu/libtasn1-6?arch=source&distro=esm-infra-legacy%2Ftrusty"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.4-3ubuntu0.6+esm1"}]}],"versions":["3.3-2","3.4-2","3.4-3","3.4-3ubuntu0.1","3.4-3ubuntu0.2","3.4-3ubuntu0.3","3.4-3ubuntu0.4","3.4-3ubuntu0.5","3.4-3ubuntu0.6"],"ecosystem_specific":{"binaries":[{"binary_version":"3.4-3ubuntu0.6+esm1","binary_name":"libtasn1-3-bin"},{"binary_version":"3.4-3ubuntu0.6+esm1","binary_name":"libtasn1-6"},{"binary_name":"libtasn1-bin","binary_version":"3.4-3ubuntu0.6+esm1"}],"availability":"Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-7954-2.json","cves_map":{"ecosystem":"Ubuntu:Pro:14.04:LTS","cves":[{"id":"CVE-2021-46848","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-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"}]}]}}},{"package":{"name":"libtasn1-6","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/libtasn1-6?arch=source&distro=esm-infra%2Fxenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.7-3ubuntu0.16.04.3+esm4"}]}],"versions":["4.5-2","4.7-2","4.7-3","4.7-3ubuntu0.16.04.1","4.7-3ubuntu0.16.04.2","4.7-3ubuntu0.16.04.3","4.7-3ubuntu0.16.04.3+esm2","4.7-3ubuntu0.16.04.3+esm3"],"ecosystem_specific":{"availability":"Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro","binaries":[{"binary_version":"4.7-3ubuntu0.16.04.3+esm4","binary_name":"libtasn1-3-bin"},{"binary_name":"libtasn1-6","binary_version":"4.7-3ubuntu0.16.04.3+esm4"},{"binary_version":"4.7-3ubuntu0.16.04.3+esm4","binary_name":"libtasn1-bin"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-7954-2.json","cves_map":{"ecosystem":"Ubuntu:Pro:16.04:LTS","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"},{"type":"Ubuntu","score":"medium"}]}]}}},{"package":{"name":"libtasn1-6","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/libtasn1-6?arch=source&distro=esm-infra%2Fbionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.13-2ubuntu0.1~esm1"}]}],"versions":["4.12-2.1","4.12-3","4.13-2"],"ecosystem_specific":{"binaries":[{"binary_version":"4.13-2ubuntu0.1~esm1","binary_name":"libtasn1-6"},{"binary_name":"libtasn1-bin","binary_version":"4.13-2ubuntu0.1~esm1"}],"availability":"Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro"},"database_specific":{"cves_map":{"ecosystem":"Ubuntu:Pro:18.04:LTS","cves":[{"id":"CVE-2021-46848","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H"},{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H","type":"CVSS_V3"},{"type":"Ubuntu","score":"low"}]},{"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"},{"type":"Ubuntu","score":"medium"}]}]},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-7954-2.json"}},{"package":{"name":"libtasn1-6","ecosystem":"Ubuntu:Pro:20.04:LTS","purl":"pkg:deb/ubuntu/libtasn1-6?arch=source&distro=esm-infra%2Ffocal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.16.0-2ubuntu0.1+esm1"}]}],"versions":["4.14-3","4.15.0-2","4.16.0-2","4.16.0-2ubuntu0.1"],"ecosystem_specific":{"availability":"Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro","binaries":[{"binary_name":"libtasn1-6","binary_version":"4.16.0-2ubuntu0.1+esm1"},{"binary_name":"libtasn1-bin","binary_version":"4.16.0-2ubuntu0.1+esm1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-7954-2.json","cves_map":{"ecosystem":"Ubuntu:Pro:20.04:LTS","cves":[{"id":"CVE-2021-46848","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H"},{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H","type":"CVSS_V3"},{"type":"Ubuntu","score":"low"}]},{"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"}]}}}],"schema_version":"1.7.5"}