Out-of-bounds Write Affecting vim-enhanced package, versions <2:8.2.2637-26.el9_8.21


Severity

Recommended
high

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.15% (4th percentile)

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  • Snyk IDSNYK-RHEL9-VIMENHANCED-19712182
  • published13 Sept 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 RHEL:9 vim-enhanced to version 2:8.2.2637-26.el9_8.21 or higher.
This issue was patched in RHSA-2026:66366.

NVD Description

Note: Versions mentioned in the description apply only to the upstream vim-enhanced package and not the vim-enhanced package as distributed by RHEL. See How to fix? for RHEL:9 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