CVE-2026-59857

NameCVE-2026-59857
DescriptionVim is an open source, command line text editor. Prior to 9.2.0725, the single-byte branch of spell_soundfold_sal() in src/spell.c translates a word through a spell file's SAL sound-folding rules into a caller-owned result buffer, but its result writes are guarded with reslen < MAXWLEN, allowing reslen to reach MAXWLEN before res[reslen] = NUL writes one byte past the end of the MAXWLEN-element stack buffer. A boundary-length word passed to soundfold(), or reached via sound-based spell suggestion while a SAL-based spell language is active under a non-multibyte 8-bit encoding, can corrupt the eval_soundfold() stack frame and crash the editor. This issue is fixed in version 9.2.0725.
SourceCVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
vim (PTS)bullseye2:8.2.2434-3+deb11u1vulnerable
bullseye (security)2:8.2.2434-3+deb11u3vulnerable
bookworm2:9.0.1378-2+deb12u2vulnerable
trixie2:9.1.1230-2vulnerable
forky2:9.2.0524-1vulnerable
sid2:9.2.0782-1fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
vimsource(unstable)2:9.2.0782-1

Notes

https://github.com/vim/vim/security/advisories/GHSA-m3hf-xcm3-xhm2
Fixed by: https://github.com/vim/vim/commit/d22ff1c955ff87e8273210eae125aab0e85b6c30 (9.2.0725)

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