Vulnerability Description
Vim 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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Vim | Vim | < 9.2.0725 |
Related Weaknesses (CWE)
References
- https://github.com/vim/vim/commit/d22ff1c955ff87e8273210eae125aab0e85b6c30Patch
- https://github.com/vim/vim/security/advisories/GHSA-m3hf-xcm3-xhm2PatchVendor Advisory
FAQ
What is CVE-2026-59857?
CVE-2026-59857 is a vulnerability with a CVSS score of 5.5 (MEDIUM). Vim 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...
How severe is CVE-2026-59857?
CVE-2026-59857 has been rated MEDIUM with a CVSS base score of 5.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-59857?
Check the references section above for vendor advisories and patch information. Affected products include: Vim Vim.