Out-of-bounds Write Affecting vim package, versions <2:8.1.2269-1ubuntu5.32+esm10


Severity

Recommended
medium

Based on Ubuntu security rating.

Threat Intelligence

EPSS
0.11% (2nd percentile)

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  • Snyk IDSNYK-UBUNTU2004-VIM-17940549
  • published14 Jul 2026
  • disclosed9 Jul 2026

Introduced: 9 Jul 2026

CVE-2026-59857  (opens in a new tab)
CWE-787  (opens in a new tab)

How to fix?

Upgrade Ubuntu:20.04 vim to version 2:8.1.2269-1ubuntu5.32+esm10 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream vim package and not the vim package as distributed by Ubuntu. See How to fix? for Ubuntu:20.04 relevant fixed versions and status.

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 Base Scores

version 3.1