CVE-2026-40468

UNKNOWN 0.0

Heap buffer overflow in gawk

CVSS Score

0.0

EPSS Score

0.0%

EPSS Percentile

0th

Integer overflow vulnerability has been found in "builtin.c" program file of gawk. This issue may lead to memory exhaustion on the hosting operating system and could be used to overwrite gawk heap metadata and objects with attacker-controlled bytes. It affects gawk in versions 5.4.0 and below.

CWE	CWE-190
Vendor	gnu
Product	gawk
Published	Jul 13, 2026
Last Updated	Jul 13, 2026

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Affected Versions

GNU / gawk

0 ≤ 5.4.0

References

NVD ↗ CVE.org ↗ EPSS Data ↗

cgit.git.savannah.gnu.org: https://cgit.git.savannah.gnu.org/cgit/gawk.git/commit/?id=062f2f2581b991362c046f7f2e238ffa34e6f8c7 cert.pl: https://cert.pl/en/posts/2026/07/CVE-2026-40467

Credits

Michał Majchrowicz (AFINE) Marcin Wyczechowski (AFINE)