CVE-2026-40469CWE-190

Heap buffer overflow in gawk

Medium · published July 13, 2026

CVSS v4.0
5.1
EPSS
0%
Percentile
11.1
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
5.1 · MEDIUM
Vector
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
EPSS
0.00213 · 11.1th percentile
Weakness
CWE-190 · Integer Overflow or Wraparound
Published
2026-07-13T12:07Z
EPSS history
Timeline
  • 13 JUL 12:07Z
    Heap buffer overflow in gawk
    cvelistv5