CVE-2026-40468 PUBLISHED

Heap buffer overflow in gawk

Assigner: CERT-PL
Reserved: 13.04.2026 Published: 13.07.2026 Updated: 13.07.2026

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.

Metrics

CVSS 4.0

CVSS Vector: CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:L
CVSS Score: 2.1

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Local	Confidentiality	None	Confidentiality	None
Attack Complexity	Low	Integrity	Low	Integrity	None
Attack Requirements	Present	Availability	Low	Availability	Low
Privileges Required	None
User Interaction	None

CVSS 4.0

Product Status

Vendor	GNU
Product	gawk
Versions	Default: unaffected affected from 0 to 5.4.0 (incl.)

Affected Configurations

An operating system hosting the vulnerable program must have at least 6GB of available memory.

CVE-2026-40468 PUBLISHED

Heap buffer overflow in gawk

Metrics

Product Status

Affected Configurations

Credits

References

Problem Types