CVE-2026-40469 | Integer overflow vulnerability has been found in "builtin.c"… | CVSS 5.1 MEDIUM

Description

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.

Metadata

CVE ID: CVE-2026-40469
State: PUBLISHED
Assigner: CERT-PL
Reserved: 2026-04-13 14:44 UTC
Published: 2026-07-13 12:07 UTC
Last updated: 2026-07-13 13:01 UTC
Primary CWE: CWE-190
CWE-190 Integer Overflow or Wraparound
Vendor / Product: GNU / gawk
Sources: cve.org · NVD

Severity & Metrics

5.1 MEDIUM CVSS 4.0

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

SSVC — CISA Coordinator

Exploitation: none
Automatable: no
Tech. Impact: partial

Affected products (1)

Vendor	Product	Platform	Versions
GNU	gawk	32 bit	0 ≤ 5.4.0

Weakness (CWE)

CWE	Source	Description
CWE-190	cna	CWE-190 Integer Overflow or Wraparound

CVSS scores (1)

Score	Severity	Version	Source	Vector
5.1	MEDIUM	4.0	cna	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

References (2)