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CVE-2026-18938 is an integer-overflow vulnerability in p11-kit's RPC message parser when decoding nested attributes on 32-bit systems. Specially crafted nested attribute messages can cause an allocation-size miscalculation, followed by a heap out-of-bounds write during parsing. The resulting memory corruption can terminate the p11-kit RPC parsing process.
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Patch, then assume compromise.
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No public exploit code observed for this vulnerability.
2 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
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.