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CVE-2026-55892 is a stack-based out-of-bounds write in Vim versions prior to 9.2.0662. The spell-processing function dump_prefixes() traverses a spell-file prefix trie using a depth counter but does not validate that depth against the bounds of fixed-size stack arrays used to retain traversal state. A malicious Vim spell file can force traversal beyond MAXWLEN, causing writes past the stack arrays, corruption of the call frame, and an editor crash.
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What an attacker gets, and what they’ve been doing with it.
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Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
18 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A Vim denial-of-service vulnerability that can be triggered with a crafted spell file.
A vulnerability addressed by the Oracle Linux 10 Vim package security update; no technical flaw details are provided.
A vulnerability addressed by AlmaLinux advisory ALSA-2026:66348 for Vim packages.
A Vim denial-of-service vulnerability that can be triggered through a crafted spell file.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.