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CVE-2026-20345 is a memory-corruption vulnerability in ClamAV's GPT file-format parser. An indexing error in endian conversion of GPT partition names can read from or write beyond a stack-allocated partition-entry buffer. It affects ClamAV versions 0.98.2 through 1.5.3 and is fixed in versions 1.4.6 and 1.5.4.
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What an attacker gets, and what they’ve been doing with it.
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Patch, then assume compromise.
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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.
23 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A ClamAV vulnerability addressed by Ubuntu USN-8788-1.
An out-of-bounds read/write flaw in ClamAV caused by an indexing error during GPT partition-name conversion.
A ClamAV GPT parser memory-corruption vulnerability involving improper endian conversion and a potential out-of-bounds buffer write, primarily enabling denial of service.
An improper endian-conversion handling vulnerability in ClamAV's GPT parser that can cause an out-of-bounds buffer write. A crafted GPT file submitted for scanning can terminate the ClamAV scanning process, causing denial of service.
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.