CVE-2026-55693
highpriority · track · 31EPSS 0.001 · 2 %ileDEEURUUSEPSS · scored 2026-10-27
Vim is an open source, command line text editor. Prior to 9.2.0653, the tree_count_words() function in src/spellfile.c fills in the word-count fields of a spell-file word trie by walking it iteratively with a depth counter. 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 (arridx[], curi[], wordcount[]). A crafted .spl/.sug file pair, loaded when the user invokes spell suggestion, 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 9.2.0653.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 5.7–7.8
ssvc
A stakeholder decision — act, attend, or track — from exploitation and impact.
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (35)
Products and version ranges known to be affected.
- Red Hat OpenShift Container Platformall versionscert_bundDEcpe:/a:redhat:openshift:container_platform
advisories (2)
Vendor and ecosystem advisories describing this.
- WID-SEC-W-2026-1926vim: Schwachstelle ermöglicht Denial of ServiceDeutsch2026-06-15csaf · cert_bundDE
Ein Angreifer kann eine Schwachstelle in vim ausnutzen, um einen Denial of Service Angriff durchzuführen.
- WID-SEC-W-2026-3043IBM QRadar SIEM: Mehrere SchwachstellenDeutsch2026-08-26csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in IBM QRadar SIEM ausnutzen, um Sicherheitsvorkehrungen zu umgehen, um seine Privilegien zu erhöhen, um einen Denial of Service Angriff durchzuführen, um Informationen offenzulegen, um Dateien zu manipulieren, um einen Cross-Site Scripting Angriff durchzuführen und um beliebigen Programmcode auszuführen.
also known as (4)
Other names and identifiers for this entity.
sources
Which sources assert this record, and when.
references (10)
External citations — patches, advisories, analysis.
- https://github.com/vim/vim/commit/a80874d9b84a01040e3d1aef2d4a59e1934dafb7cnnvd
- https://github.com/vim/vim/releases/tag/v9.2.0653cnnvd
- https://github.com/vim/vim/security/advisories/GHSA-wgh4-64f7-q3jqcnnvd
- https://www.vim.org/download.phpPatchcnnvd
- https://github.com/vim/vim/commit/a80874d9b84a01040e3d1aef2d4a59e1934dafb7enisa_euvd
- https://github.com/vim/vim/releases/tag/v9.2.0653enisa_euvd
- https://github.com/vim/vim/security/advisories/GHSA-wgh4-64f7-q3jqenisa_euvd
- https://github.com/vim/vim/commit/a80874d9b84a01040e3d1aef2d4a59e1934dafb7Patchnvd
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