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CVE-2026-40468 is an integer-overflow vulnerability in the builtin.c program file of GNU Awk (gawk) affecting versions 5.4.0 and earlier. The flaw can cause memory exhaustion on the host operating system and may permit overwriting gawk heap metadata and heap objects with attacker-controlled bytes.
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What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
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.
37 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
An integer-overflow vulnerability in gawk that causes memory corruption.
An integer-overflow memory-corruption vulnerability in gawk affecting Rocky Linux 9 packages covered by CIQ advisory crlsa-2026_73512.
An unauthenticated network-exploitable vulnerability affecting gawk packages on Oracle Linux 8, with high integrity and availability impact according to the supplied CVSS vectors.
A vulnerability affecting AlmaLinux 8 packages covered by the RHSA-2026:73511 update. The supplied CVSS v3 vector describes a network-accessible, low-complexity issue requiring no privileges or user interaction, with high integrity and availability impact.
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.