Fossies Gawk — CVE-2026-40469 (Critical)

Date Jul 13, 2026

Type Vendor advisory

Signal Critical vendor advisory

Vendor / Product Fossies · Gawk

CVE CVE-2026-40469

Critical vendor advisory CVE-2026-40469

Summary

Integer overflow vulnerability has been found in "builtin.c" program file of gawk (do_sub() routine). This issue could be used to overwrite gawk heap metadata and objects causing the program to crash. It affects 32-bit builds of gawk in versions 5.4.0 and below.

Why it matters

This CVE carries a CRITICAL severity rating (CVSS 9.1) in Fossies Gawk. Patch or mitigate promptly.

Operator check

Review CVE-2026-40469 in your asset inventory. Apply patches per vendor guidance and verify Gawk is not exposed. CVSS score: 9.1.

Sources

NVD — CVE-2026-40469 Source reference Source reference

PatchBrief uses public sources. It does not scan environments, verify exposure, or replace vendor guidance.

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