CVE-2026-59857: Vim: Out-of-bounds Write in SAL Soundfolding
Last updated 13 July 2026
Other sources
Vim is an open source, command line text editor. Prior to 9.2.0725, the single-byte branch of spellsoundfoldsal() 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 evalsoundfold() stack frame and crash the editor. This issue is fixed in version 9.2.0725.
— NVD
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
debian/vimto a version that resolves this vulnerability.Fixed in 2:9.2.0782-1 - Upgrade
Upgrade
vimto a version that resolves this vulnerability.Fixed in 9.2.0725
Event History
Frequently Asked Questions
What is the severity of CVE-2026-59857?
CVE-2026-59857 has a medium severity rating of 5.6.
How do I fix CVE-2026-59857?
To fix CVE-2026-59857, update Vim to version 9.2.0725 or later.
What type of vulnerability is CVE-2026-59857?
CVE-2026-59857 is an out-of-bounds write vulnerability.
What component of Vim is affected by CVE-2026-59857?
CVE-2026-59857 affects the spell_soundfold_sal() function in src/spell.c.
What could be the potential impact of exploiting CVE-2026-59857?
Exploitation of CVE-2026-59857 could lead to memory corruption and potential execution of arbitrary code.