{"id":"CVE-2016-7972","aliases":["ALPINE-CVE-2016-7972","DEBIAN-CVE-2016-7972","DLA-668-1","EUVD-2016-8820","GHSA-p6w9-gq3p-g5g4","MGASA-2016-0341","SUSE-SU-2016:3107-1","UBUNTU-CVE-2016-7972","USN-4797-1","openSUSE-SU-2024:10508-1"],"status":"published","title":"The check_allocations function in libass/ass_shaper.c in libass before 0.13.4 allows remote...","description":"The check_allocations function in libass/ass_shaper.c in libass before 0.13.4 allows remote attackers to cause a denial of service (memory allocation failure) via unspecified vectors.","severity":{"version":"3.0","score":7.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-08","score":0.0523,"percentile":0.92572,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-399"],"published":"2016-10-12T15:09:49Z","modified":"2026-10-20T10:47:31Z","fixes":[{"ecosystem":"Alpine:v3.10","package":"libass","fixed_in":["0.13.4-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.11","package":"libass","fixed_in":["0.13.4-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.3","package":"libass","fixed_in":["0.13.4-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.4","package":"libass","fixed_in":["0.13.4-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.5","package":"libass","fixed_in":["0.13.4-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.6","package":"libass","fixed_in":["0.13.4-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.7","package":"libass","fixed_in":["0.13.4-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.8","package":"libass","fixed_in":["0.13.4-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.9","package":"libass","fixed_in":["0.13.4-r0"],"sources":["osv"]},{"ecosystem":"Debian:12","package":"libass","fixed_in":["0.13.4-1"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"libass","fixed_in":["0.13.4-1"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"libass","fixed_in":["0.13.4-1"],"sources":["osv"]},{"ecosystem":"Ubuntu:Pro:14.04:LTS","package":"libass","fixed_in":["0.10.1-3ubuntu1+esm1"],"sources":["osv"]},{"ecosystem":"Ubuntu:Pro:16.04:LTS","package":"libass","fixed_in":["0.13.1-1ubuntu0.1~esm1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Alpine:v3.10","package":"libass","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.13.4-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.11","package":"libass","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.13.4-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.3","package":"libass","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.13.4-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.4","package":"libass","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.13.4-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.5","package":"libass","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.13.4-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.6","package":"libass","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.13.4-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.7","package":"libass","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.13.4-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.8","package":"libass","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.13.4-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.9","package":"libass","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.13.4-r0"}]}]},{"source":"osv","ecosystem":"Debian:12","package":"libass","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.13.4-1"}]}]},{"source":"osv","ecosystem":"Debian:13","package":"libass","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.13.4-1"}]}]},{"source":"osv","ecosystem":"Debian:14","package":"libass","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.13.4-1"}]}]},{"source":"osv","ecosystem":"Debian:7","package":"libass","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.10.0-3+deb7u1"}]}],"versions":["0.10.0-3"],"bundled":2},{"source":"osv","ecosystem":"Mageia:5","package":"libass","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.13.4-1.mga5"}]}],"bundled":3},{"source":"osv","ecosystem":"SUSE:Linux Enterprise Desktop 12 SP1","package":"libass","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.10.2-3.1"}]}],"bundled":4},{"source":"osv","ecosystem":"SUSE:Linux Enterprise Desktop 12 SP2","package":"libass","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.10.2-3.1"}]}],"bundled":4},{"source":"osv","ecosystem":"SUSE:Linux Enterprise Server for Raspberry Pi 12 SP2","package":"libass","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.10.2-3.1"}]}],"bundled":4},{"source":"osv","ecosystem":"SUSE:Linux Enterprise Software Development Kit 12 SP1","package":"libass","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.10.2-3.1"}]}],"bundled":4},{"source":"osv","ecosystem":"SUSE:Linux Enterprise Software Development Kit 12 SP2","package":"libass","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.10.2-3.1"}]}],"bundled":4},{"source":"osv","ecosystem":"SUSE:Linux Enterprise Server 12 SP1","package":"libass","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.10.2-3.1"}]}],"bundled":4},{"source":"osv","ecosystem":"SUSE:Linux Enterprise Server for SAP Applications 12 SP1","package":"libass","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.10.2-3.1"}]}],"bundled":4},{"source":"osv","ecosystem":"SUSE:Linux Enterprise Server 12 SP2","package":"libass","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.10.2-3.1"}]}],"bundled":4},{"source":"osv","ecosystem":"SUSE:Linux Enterprise Server for SAP Applications 12 SP2","package":"libass","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.10.2-3.1"}]}],"bundled":4},{"source":"osv","ecosystem":"Ubuntu:Pro:14.04:LTS","package":"libass","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.10.1-3ubuntu1+esm1"}]}],"versions":["0.10.1-1ubuntu1","0.10.1-3","0.10.1-3ubuntu1"]},{"source":"osv","ecosystem":"Ubuntu:Pro:16.04:LTS","package":"libass","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.13.1-1ubuntu0.1~esm1"}]}],"versions":["0.12.3-2","0.13.0-1","0.13.1-1"]},{"source":"osv","ecosystem":"Ubuntu:Pro:14.04:LTS","package":"libass","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.10.1-3ubuntu1+esm1"}]}],"versions":["0.10.1-1ubuntu1","0.10.1-3","0.10.1-3ubuntu1"],"bundled":4},{"source":"osv","ecosystem":"Ubuntu:Pro:16.04:LTS","package":"libass","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.13.1-1ubuntu0.1~esm2"}]}],"versions":["0.12.3-2","0.13.0-1","0.13.1-1","0.13.1-1ubuntu0.1~esm1"],"bundled":4}],"products":[{"vendor":"fedoraproject","product":"fedora"},{"vendor":"libass_project","product":"libass"},{"vendor":"opensuse","product":"leap"},{"vendor":"opensuse","product":"opensuse"}],"references":[{"url":"https://security.gentoo.org/glsa/201702-25","tags":["vendor-advisory","x_refsource_GENTOO","x_transferred","Patch","Third Party Advisory","VDB Entry","fix"]},{"url":"https://github.com/libass/libass/pull/240/commits/aa54e0b59200a994d50a346b5d7ac818ebcf2d4b","tags":["x_refsource_CONFIRM","x_transferred","Issue Tracking","Patch","Third Party Advisory","fix"]},{"url":"http://www.securityfocus.com/bid/93358","tags":["vdb-entry","x_refsource_BID","x_transferred","Third Party Advisory","VDB Entry","advisory"]},{"url":"https://github.com/libass/libass/releases/tag/0.13.4","tags":["x_refsource_CONFIRM","x_transferred","Patch","Release Notes","Third Party Advisory","fix"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/KW6DNERYHPI5Y6SQYU3XKTVSCOWMIHUC/","tags":["vendor-advisory","x_refsource_FEDORA","x_transferred","web"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=1381960","tags":["x_refsource_CONFIRM","x_transferred","Issue Tracking","Patch","fix"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VUOUOK3VULMMZTNSCRFCNPDAPDWAVK7X/","tags":["vendor-advisory","x_refsource_FEDORA","x_transferred","web"]},{"url":"http://lists.opensuse.org/opensuse-updates/2016-12/msg00068.html","tags":["vendor-advisory","x_refsource_SUSE","x_transferred","Third Party Advisory","advisory"]},{"url":"http://www.openwall.com/lists/oss-security/2016/10/05/2","tags":["mailing-list","x_refsource_MLIST","x_transferred","Mailing List","Patch","Third Party Advisory","fix","report"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/R7JJ2SGVOX6UQQIRMVC3QACJLKHE2PYN/","tags":["vendor-advisory","x_refsource_FEDORA","x_transferred","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2016-7972"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/KW6DNERYHPI5Y6SQYU3XKTVSCOWMIHUC"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/R7JJ2SGVOX6UQQIRMVC3QACJLKHE2PYN"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VUOUOK3VULMMZTNSCRFCNPDAPDWAVK7X"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/KW6DNERYHPI5Y6SQYU3XKTVSCOWMIHUC"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/R7JJ2SGVOX6UQQIRMVC3QACJLKHE2PYN"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/VUOUOK3VULMMZTNSCRFCNPDAPDWAVK7X"},{"url":"https://github.com/advisories/GHSA-p6w9-gq3p-g5g4"},{"url":"https://security.alpinelinux.org/vuln/CVE-2016-7972","tags":["advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2016-7972","tags":["advisory"]},{"url":"https://advisories.mageia.org/MGASA-2016-0341.html","tags":["advisory"]},{"url":"https://bugs.mageia.org/show_bug.cgi?id=19537","tags":["report"]},{"url":"https://github.com/libass/libass/releases","tags":["web"]},{"url":"https://www.suse.com/support/update/announcement/2016/suse-su-20163107-1/","tags":["advisory"]},{"url":"https://bugzilla.suse.com/1002982","tags":["report"]},{"url":"https://www.suse.com/security/cve/CVE-2016-7969","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2016-7970","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2016-7971","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2016-7972","tags":["web"]},{"url":"https://ubuntu.com/security/CVE-2016-7972","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2016-7972","tags":["report"]},{"url":"https://ubuntu.com/security/notices/USN-4797-1","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2016-7969","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2016-7970","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2020-24994","tags":["report"]},{"url":"","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2016-7972","description":"The check_allocations function in libass/ass_shaper.c in libass before 0.13.4 allows remote attackers to cause a denial of service (memory allocation failure) via unspecified vectors.","status":"published","published":"2017-03-03T16:00:00Z","modified":"2024-08-06T02:13:21.33Z","updated_at":"2026-11-02T14:33:36.483151Z"}],"euvd":[{"id":"EUVD-2016-8820","description":"The check_allocations function in libass/ass_shaper.c in libass before 0.13.4 allows remote attackers to cause a denial of service (memory allocation failure) via unspecified vectors.","status":"published","published":"2017-03-03T16:00:00Z","modified":"2024-08-06T02:13:21Z","updated_at":"2026-11-03T02:22:30.942601Z"}],"ghsa":[{"id":"GHSA-p6w9-gq3p-g5g4","title":"The check_allocations function in libass/ass_shaper.c in libass before 0.13.4 allows remote...","description":"The check_allocations function in libass/ass_shaper.c in libass before 0.13.4 allows remote attackers to cause a denial of service (memory allocation failure) via unspecified vectors.","status":"published","published":"2022-05-14T02:05:07Z","modified":"2025-04-20T03:34:43Z","cvss":[{"version":"3.0","score":7.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:01:42.453698Z"}],"nvd":[{"id":"CVE-2016-7972","description":"The check_allocations function in libass/ass_shaper.c in libass before 0.13.4 allows remote attackers to cause a denial of service (memory allocation failure) via unspecified vectors.","status":"published","published":"2017-03-03T16:59:00.717Z","modified":"2026-06-17T00:53:51.783Z","cvss":[{"version":"3.0","score":7.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:N/I:N/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-399"],"updated_at":"2026-11-02T14:03:37.238712Z"}],"osv":[{"id":"ALPINE-CVE-2016-7972","description":"The check_allocations function in libass/ass_shaper.c in libass before 0.13.4 allows remote attackers to cause a denial of service (memory allocation failure) via unspecified vectors.","status":"published","published":"2017-03-03T16:59:00.717Z","modified":"2026-09-22T06:30:40.204428285Z","cvss":[{"version":"3.0","score":7.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:27:46.716249Z"},{"id":"CVE-2016-7972","description":"The check_allocations function in libass/ass_shaper.c in libass before 0.13.4 allows remote attackers to cause a denial of service (memory allocation failure) via unspecified vectors.","status":"published","published":"2017-03-03T16:59:00.717Z","modified":"2026-10-20T10:47:31.580341021Z","cvss":[{"version":"3.0","score":7.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:44:03.171316Z"},{"id":"DEBIAN-CVE-2016-7972","description":"The check_allocations function in libass/ass_shaper.c in libass before 0.13.4 allows remote attackers to cause a denial of service (memory allocation failure) via unspecified vectors.","status":"published","published":"2017-03-03T16:59:00.717Z","modified":"2026-09-22T07:02:33.310050424Z","cvss":[{"version":"3.0","score":7.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:45:27.910042Z"},{"id":"UBUNTU-CVE-2016-7972","description":"The check_allocations function in libass/ass_shaper.c in libass before 0.13.4 allows remote attackers to cause a denial of service (memory allocation failure) via unspecified vectors.","status":"published","published":"2017-03-03T16:59:00Z","modified":"2026-04-22T10:59:56.416142Z","cvss":[{"version":"3.0","score":7.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:54:12.994319Z"},{"id":"DLA-668-1","title":"libass - security update","status":"published","published":"2016-10-19T00:00:00Z","modified":"2026-03-09T02:10:24.747642Z","updated_at":"2026-11-02T15:46:13.207219Z"},{"id":"MGASA-2016-0341","title":"Updated libass packages fixes security vulnerabilities","description":"Amount of memory allocated during memory reallocation in the shaper wasn't\ntracked, possibly resulting in undefined behavior (CVE-2016-7972).\n\nIllegal read in Gaussian blur coefficient calculations (CVE-2016-7970).\n\nMode 0/3 line wrapping equalization in specific cases could result in illegal\nreads while laying out and shaping text. (CVE-2016-7969)\n\nThe libass package has been updated to version 0.13.4, fixing this issue and\nseveral other bugs.\n","status":"published","published":"2016-10-12T15:09:49Z","modified":"2026-04-16T06:26:19.421206925Z","updated_at":"2026-11-02T15:49:40.103088Z"},{"id":"openSUSE-SU-2024:10508-1","title":"libass-devel-0.13.4-2.1 on GA media","description":"These are all security issues fixed in the libass-devel-0.13.4-2.1 package on the GA media of openSUSE Tumbleweed.","status":"published","published":"2024-06-15T00:00:00Z","modified":"2026-02-04T04:19:27.841619Z","updated_at":"2026-11-02T16:58:34.487567Z"},{"id":"SUSE-SU-2016:3107-1","title":"Security update for libass","description":"\n\nThis update for libass fixes the following issues:\n\nCVE-2016-7969, CVE-2016-7970, CVE-2016-7971, CVE-2016-7972: Fixed multiple memory allocation issues found by fuzzing (bsc#1002982).\n \n","status":"published","published":"2016-12-13T08:19:14Z","modified":"2026-02-04T02:49:06.756206Z","updated_at":"2026-11-02T15:53:43.438985Z"},{"id":"USN-4797-1","title":"libass vulnerabilities","description":"It was discovered that LibASS incorrectly handled certain ASS files. A remote\nattacker could possibly use this issue to cause a denial of service. One of\nthe issues, CVE-2016-7970, only affected Ubuntu 16.04 ESM.\n(CVE-2016-7969, CVE-2016-7970, CVE-2016-7972)\n\nIt was discovered that LibASS incorrectly handled parsing operations for\nspecific nested character strings. An attacker could possibly use this issue\nto cause a denial of service. This issue was only fixed in Ubuntu 16.04 LTS.\n(CVE-2020-24994)\n","status":"published","published":"2022-05-04T10:38:06Z","modified":"2026-06-29T13:48:23.423049716Z","updated_at":"2026-11-02T16:58:15.159055Z"}]}}