CVE-2026-55892

Vim is an open source, command line text editor. Prior to 9.2.0662, the dump_prefixes() function in src/spell.c walks a spell-file prefix trie iteratively with a depth counter while dumping the prefixes that apply to a word. The counter is bounded only by the trie structure itself; it is never checked against the size of the fixed MAXWLEN-element stack arrays it indexes (prefix[], arridx[], curi[]). A crafted .spl file, loaded when the user dumps the word list, can drive the descent arbitrarily deep, so the function writes past the end of those arrays. This is a stack out-of-bounds write that corrupts the call frame and crashes the editor. This vulnerability is fixed in 9.2.0662.

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/8325b193bba5f01e7a7d8241f	Patch
https://github.com/vim/vim/releases/tag/v9.2.0662	Product
https://github.com/vim/vim/security/advisories/GHSA-qm9w-fmpj-879h	Vendor Advisory

Configurations

Configuration 1 (hide)

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

History

No history.

Information

Published : 2026-06-25 16:16

Updated : 2026-06-26 19:16

NVD link : CVE-2026-55892

Mitre link : CVE-2026-55892

CVE.ORG link : CVE-2026-55892

JSON object : View

Products Affected

vim

vim

CWE

CWE-787

Out-of-bounds Write

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