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CVE-2026-40469 is an integer overflow vulnerability in GNU gawk affecting 32-bit builds through version 5.4.0. The flaw is located in the do_sub() routine in builtin.c. An integer overflow during processing can result in incorrect size or offset calculations, enabling corruption of heap metadata and adjacent heap objects within the gawk process. The documented consequence is process instability and crash due to heap corruption.
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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.
6 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A reported vulnerability affecting GNU gawk software.
An integer overflow vulnerability in GNU gawk's builtin.c file, specifically the do_sub() routine, affecting 32-bit builds and potentially allowing heap metadata/object overwrite leading to a crash.
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.