{"id":"CVE-2026-32249","aliases":["ALPINE-CVE-2026-32249","AZL-79845","BELL-CVE-2026-32249","DEBIAN-CVE-2026-32249","EUVD-2026-11690","GHSA-9phh-423r-778r","MGASA-2026-0055","UBUNTU-CVE-2026-32249","USN-8171-1"],"status":"published","title":"NFA regex engine NULL pointer dereference affects Vim \u003c 9.2.0137","description":"Vim is an open source, command line text editor. From 9.1.0011 to before 9.2.0137, Vim's NFA regex compiler, when encountering a collection containing a combining character as the endpoint of a character range (e.g. [0-0\\u05bb]), incorrectly emits the composing bytes of that character as separate NFA states. This corrupts the NFA postfix stack, resulting in NFA_START_COLL having a NULL out1 pointer. When nfa_max_width() subsequently traverses the compiled NFA to estimate match width for the look-behind assertion, it dereferences state-\u003eout1-\u003eout without a NULL check, causing a segmentation fault. This vulnerability is fixed in 9.2.0137.","severity":{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.0016,"percentile":0.05276,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-476"],"published":"2026-03-12T19:17:23Z","modified":"2026-11-03T06:33:02Z","fixes":[{"ecosystem":"Alpine:v3.23","package":"vim","fixed_in":["9.2.0140-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.24","package":"vim","fixed_in":["9.2.0140-r0"],"sources":["osv"]},{"ecosystem":"Azure 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Advisory","advisory","report"]},{"url":"https://github.com/vim/vim/commit/36d6e87542cf823d833e451e09a90ee429899cec","tags":["x_refsource_MISC","Patch","fix"]},{"url":"https://github.com/vim/vim/releases/tag/v9.2.0137","tags":["x_refsource_MISC","Release Notes","web"]},{"url":"https://security.alpinelinux.org/vuln/CVE-2026-32249","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-32249","tags":["web","advisory"]},{"url":"https://docs.bell-sw.com/security/cves/CVE-2026-32249","tags":["advisory"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/32xxx/CVE-2026-32249.json","tags":["advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-32249","tags":["advisory"]},{"url":"https://advisories.mageia.org/MGASA-2026-0055.html","tags":["advisory"]},{"url":"https://bugs.mageia.org/show_bug.cgi?id=35197","tags":["report"]},{"url":"https://www.openwall.com/lists/oss-security/2026/03/11/6","tags":["web"]},{"url":"https://ubuntu.com/security/CVE-2026-32249","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-32249","tags":["report"]},{"url":"https://ubuntu.com/security/notices/USN-8171-1","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-33412","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2026-34982","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2026-32249","title":"NFA regex engine NULL pointer dereference affects Vim \u003c 9.2.0137","description":"Vim is an open source, command line text editor. From 9.1.0011 to before 9.2.0137, Vim's NFA regex compiler, when encountering a collection containing a combining character as the endpoint of a character range (e.g. [0-0\\u05bb]), incorrectly emits the composing bytes of that character as separate NFA states. This corrupts the NFA postfix stack, resulting in NFA_START_COLL having a NULL out1 pointer. When nfa_max_width() subsequently traverses the compiled NFA to estimate match width for the look-behind assertion, it dereferences state-\u003eout1-\u003eout without a NULL check, causing a segmentation fault. This vulnerability is fixed in 9.2.0137.","status":"published","published":"2026-03-12T19:17:23.954Z","modified":"2026-03-13T16:16:31.836Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L","level":"medium","assessor":"cna"}],"cwes":["CWE-476"],"updated_at":"2026-11-02T14:19:57.100857Z"}],"euvd":[{"id":"EUVD-2026-11690","description":"Vim is an open source, command line text editor. From 9.1.0011 to before 9.2.0137, Vim's NFA regex compiler, when encountering a collection containing a combining character as the endpoint of a character range (e.g. [0-0\\u05bb]), incorrectly emits the composing bytes of that character as separate NFA states. This corrupts the NFA postfix stack, resulting in NFA_START_COLL having a NULL out1 pointer. When nfa_max_width() subsequently traverses the compiled NFA to estimate match width for the look-behind assertion, it dereferences state-\u003eout1-\u003eout without a NULL check, causing a segmentation fault. This vulnerability is fixed in 9.2.0137.","status":"published","published":"2026-03-12T19:17:23Z","modified":"2026-03-13T16:16:31Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L","level":"medium"}],"updated_at":"2026-11-02T19:25:35.389351Z"}],"nvd":[{"id":"CVE-2026-32249","description":"Vim is an open source, command line text editor. From 9.1.0011 to before 9.2.0137, Vim's NFA regex compiler, when encountering a collection containing a combining character as the endpoint of a character range (e.g. [0-0\\u05bb]), incorrectly emits the composing bytes of that character as separate NFA states. This corrupts the NFA postfix stack, resulting in NFA_START_COLL having a NULL out1 pointer. When nfa_max_width() subsequently traverses the compiled NFA to estimate match width for the look-behind assertion, it dereferences state-\u003eout1-\u003eout without a NULL check, causing a segmentation fault. This vulnerability is fixed in 9.2.0137.","status":"published","published":"2026-03-12T20:16:05.523Z","modified":"2026-07-23T13:39:50.95Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L","level":"medium","assessor":"secondary"},{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","level":"medium","assessor":"primary"}],"cwes":["CWE-476"],"updated_at":"2026-11-02T14:12:09.358914Z"}],"osv":[{"id":"ALPINE-CVE-2026-32249","description":"Vim is an open source, command line text editor. From 9.1.0011 to before 9.2.0137, Vim's NFA regex compiler, when encountering a collection containing a combining character as the endpoint of a character range (e.g. [0-0\\u05bb]), incorrectly emits the composing bytes of that character as separate NFA states. This corrupts the NFA postfix stack, resulting in NFA_START_COLL having a NULL out1 pointer. When nfa_max_width() subsequently traverses the compiled NFA to estimate match width for the look-behind assertion, it dereferences state-\u003eout1-\u003eout without a NULL check, causing a segmentation fault. This vulnerability is fixed in 9.2.0137.","status":"published","published":"2026-03-12T20:16:05.523Z","modified":"2026-11-03T06:33:02.343578032Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-03T07:15:53.944853Z"},{"id":"BELL-CVE-2026-32249","status":"published","published":"2026-03-14T06:07:48.206416Z","modified":"2026-03-20T08:01:15.298405Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T15:28:23.572955Z"},{"id":"CVE-2026-32249","title":"NFA regex engine NULL pointer dereference affects Vim \u003c 9.2.0137","description":"Vim is an open source, command line text editor. From 9.1.0011 to before 9.2.0137, Vim's NFA regex compiler, when encountering a collection containing a combining character as the endpoint of a character range (e.g. [0-0\\u05bb]), incorrectly emits the composing bytes of that character as separate NFA states. This corrupts the NFA postfix stack, resulting in NFA_START_COLL having a NULL out1 pointer. When nfa_max_width() subsequently traverses the compiled NFA to estimate match width for the look-behind assertion, it dereferences state-\u003eout1-\u003eout without a NULL check, causing a segmentation fault. This vulnerability is fixed in 9.2.0137.","status":"published","published":"2026-03-12T19:17:23.954Z","modified":"2026-10-28T11:10:16.005273535Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L","level":"medium"}],"cwes":["CWE-476"],"updated_at":"2026-11-02T15:45:01.218144Z"},{"id":"DEBIAN-CVE-2026-32249","description":"Vim is an open source, command line text editor. From 9.1.0011 to before 9.2.0137, Vim's NFA regex compiler, when encountering a collection containing a combining character as the endpoint of a character range (e.g. [0-0\\u05bb]), incorrectly emits the composing bytes of that character as separate NFA states. This corrupts the NFA postfix stack, resulting in NFA_START_COLL having a NULL out1 pointer. When nfa_max_width() subsequently traverses the compiled NFA to estimate match width for the look-behind assertion, it dereferences state-\u003eout1-\u003eout without a NULL check, causing a segmentation fault. This vulnerability is fixed in 9.2.0137.","status":"published","published":"2026-03-12T20:16:05.523Z","modified":"2026-11-01T19:00:42.205307852Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T15:45:54.232518Z"},{"id":"UBUNTU-CVE-2026-32249","description":"Vim is an open source, command line text editor. From 9.1.0011 to before 9.2.0137, Vim's NFA regex compiler, when encountering a collection containing a combining character as the endpoint of a character range (e.g. [0-0\\u05bb]), incorrectly emits the composing bytes of that character as separate NFA states. This corrupts the NFA postfix stack, resulting in NFA_START_COLL having a NULL out1 pointer. When nfa_max_width() subsequently traverses the compiled NFA to estimate match width for the look-behind assertion, it dereferences state-\u003eout1-\u003eout without a NULL check, causing a segmentation fault. This vulnerability is fixed in 9.2.0137.","status":"published","published":"2026-03-12T20:16:00Z","modified":"2026-04-16T10:59:44.236356Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L","level":"medium"},{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T16:56:16.036833Z"},{"id":"AZL-79845","title":"CVE-2026-32249 affecting package vim for versions less than 9.2.0240-1","description":"Vim is an open source, command line text editor. From 9.1.0011 to before 9.2.0137, Vim's NFA regex compiler, when encountering a collection containing a combining character as the endpoint of a character range (e.g. [0-0\\u05bb]), incorrectly emits the composing bytes of that character as separate NFA states. This corrupts the NFA postfix stack, resulting in NFA_START_COLL having a NULL out1 pointer. When nfa_max_width() subsequently traverses the compiled NFA to estimate match width for the look-behind assertion, it dereferences state-\u003eout1-\u003eout without a NULL check, causing a segmentation fault. This vulnerability is fixed in 9.2.0137.","status":"published","published":"2026-03-12T20:16:05Z","modified":"2026-08-28T17:56:30.979397Z","updated_at":"2026-11-02T15:28:10.017343Z"},{"id":"MGASA-2026-0055","title":"Updated vim packages fix security vulnerability","description":"NFA regex engine NULL pointer dereference affects Vim \u003c 9.2.0137.\n(CVE-2026-32249)\n","status":"published","published":"2026-03-14T00:33:13Z","modified":"2026-04-16T04:44:46.836261548Z","updated_at":"2026-11-02T15:49:43.178336Z"},{"id":"USN-8171-1","title":"vim vulnerabilities","description":"Nathan Mills discovered that Vim could crash when parsing certain regular\nexpressions. An attacker could possibly use this issue to cause a denial of\nservice. This issue only affected Ubuntu 24.04 LTS and Ubuntu 25.10\n(CVE-2026-32249)\n\nIt was discovered that Vim did not properly sanitize user input. An\nattacker could possibly use this issue to execute arbitrary commands.\n(CVE-2026-33412)\n\nAvishay Matayev discovered that Vim's modeline sandbox could be bypassed\nwhen opening a maliciously-crafted file. An attacker could possibly use\nthis issue to execute arbitrary commands. This issue only affected Ubuntu\n20.04 LTS, Ubuntu 22.04 LTS, Ubuntu 24.04 LTS, and Ubuntu 25.10.\n(CVE-2026-34982)","status":"published","published":"2026-04-13T16:56:28Z","modified":"2026-06-30T18:15:19.699869415Z","updated_at":"2026-11-02T16:58:22.951676Z"}]}}