CVE-2026-40469

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.

Score

CVSS 3.1 9.1 Critical

Status

Analyzed - cvd@cert.pl

Published

2026-07-13

Last modified

2026-10-24

Weaknesses

CWE-190

Affected products

• Gawk (Fossies)
• Gawk (Gnu)

References

• https://cgit.git.savannah.gnu.org/cgit/gawk.git/commit/?id=ae1b2d508f46913269a9e62aceda3636afe8147b
• https://cert.pl/en/posts/2026/07/CVE-2026-40467