CVE-2026-55892 (GCVE-0-2026-55892)

Vulnerability from cvelistv5 – Published: 2026-06-25 15:32 – Updated: 2026-06-26 18:43
VLAI
Title
Vim: Out-of-bounds Write in Spell File Prefix Dump
Summary
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.
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-26 17:50 UTC
CWE
Assigner
GitHub_M CNA under the mitre root
CNA scorecard C 72/100 over 7951 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
vim vim Affected: < 9.2.0662
guessed Create a notification for this product.
Show details on NVD website
To clipboard 

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