CVE-2026-59857

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 v3 5.5 MEDIUM

5.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/vim/vim/commit/d22ff1c955ff87e8273210eae125aab0e85b6c30	Patch
https://github.com/vim/vim/security/advisories/GHSA-m3hf-xcm3-xhm2	Patch Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:vim:vim:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2026-07-09 23:17

Updated : 2026-07-10 19:23

NVD link : CVE-2026-59857

Mitre link : CVE-2026-59857

CVE.ORG link : CVE-2026-59857

JSON object : View

Products Affected

vim

vim

CWE

CWE-787

Out-of-bounds Write

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