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CVE-2026-28421 is a heap-buffer-overflow vulnerability in the swap-file recovery logic of Vim versions prior to 9.2.0077. Unvalidated fields read from crafted pointer blocks within a swap file can trigger a heap buffer overflow and segmentation fault during recovery. Exploitation can cause denial of service and information disclosure. Vim 9.2.0077 fixes the vulnerability; distribution packages may incorporate backported fixes.
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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.
36 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A high-severity local Vim vulnerability in swap-file recovery logic. Crafted swap-file pointer blocks can trigger heap buffer overflow and segmentation fault conditions. Vim 9.2.0077 fixes the flaw.
A Vim vulnerability referenced by the advisory. The plugin attributes a CVSS v3 base score of 7.8 to this CVE.
Vim vulnerability referenced by the TuxCare security update.
A Vim swap-file recovery vulnerability involving heap buffer overflow and segmentation fault conditions triggered by crafted swap-file pointer blocks.
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.