{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-55892", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-06-17T16:59:42.760Z", "datePublished": "2026-06-25T15:32:41.238Z", "dateUpdated": "2026-06-25T15:32:41.238Z"}, "containers": {"cna": {"title": "Vim: Out-of-bounds Write in Spell File Prefix Dump", "problemTypes": [{"descriptions": [{"cweId": "CWE-787", "lang": "en", "description": "CWE-787: Out-of-bounds Write", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H", "version": "3.1"}}], "references": [{"name": "https://github.com/vim/vim/security/advisories/GHSA-qm9w-fmpj-879h", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/vim/vim/security/advisories/GHSA-qm9w-fmpj-879h"}, {"name": "https://github.com/vim/vim/commit/8325b193bba5f01e7a7d8241f", "tags": ["x_refsource_MISC"], "url": "https://github.com/vim/vim/commit/8325b193bba5f01e7a7d8241f"}, {"name": "https://github.com/vim/vim/releases/tag/v9.2.0662", "tags": ["x_refsource_MISC"], "url": "https://github.com/vim/vim/releases/tag/v9.2.0662"}], "affected": [{"vendor": "vim", "product": "vim", "versions": [{"version": "< 9.2.0662", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-06-25T15:32:41.238Z"}, "descriptions": [{"lang": "en", "value": "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."}], "source": {"advisory": "GHSA-qm9w-fmpj-879h", "discovery": "UNKNOWN"}}}}

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