| Name | CVE-2026-55892 |
| Description | Vim is an open source, command line text editor. Prior to 9.2.0662, the dump_prefixes() function in src/spell.c walks a spell-file prefix trie iteratively with a depth counter while dumping the prefixes that apply to a word. The counter is bounded only by the trie structure itself; it is never checked against the size of the fixed MAXWLEN-element stack arrays it indexes (prefix[], arridx[], curi[]). A crafted .spl file, loaded when the user dumps the word list, can drive the descent arbitrarily deep, so the function writes past the end of those arrays. This is a stack out-of-bounds write that corrupts the call frame and crashes the editor. This vulnerability is fixed in 9.2.0662. |
| Source | CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| References | DSA-6600-1 |
| Debian Bugs | 1140775 |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| vim (PTS) | bookworm | 2:9.0.1378-2+deb12u2 | vulnerable |
| trixie | 2:9.1.1230-2 | vulnerable | |
| trixie (security) | 2:9.1.1230-2+deb13u1 | fixed | |
| forky, sid | 2:9.2.0858-1 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| vim | source | trixie | 2:9.1.1230-2+deb13u1 | DSA-6600-1 | ||
| vim | source | (unstable) | 2:9.2.0782-1 | 1140775 |
https://github.com/vim/vim/security/advisories/GHSA-qm9w-fmpj-879h
Fixed by: https://github.com/vim/vim/commit/8325b193bba5f01e7a7d8241fc8633d93dff996b (v9.2.0662)