CVE-2026-40468

Publication date 13 July 2026

Last updated 6 August 2026

Ubuntu priority

Cvss 3 Severity Score

Description

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.

Status

Show unmaintained releases

Package	Ubuntu Release	Status
gawk	26.04 LTS resolute	Fixed 1:5.3.2-1ubuntu1.1
	24.04 LTS noble	Fixed 1:5.2.1-2ubuntu0.1
	22.04 LTS jammy	Fixed 1:5.1.0-1ubuntu0.2
	20.04 LTS focal	Fixed 1:5.0.1+dfsg-1ubuntu0.1+esm1
	18.04 LTS bionic	Fixed 1:4.1.4+dfsg-1ubuntu0.1~esm2
	16.04 LTS xenial	Fixed 1:4.1.3+dfsg-0.1ubuntu0.1~esm2
	14.04 LTS trusty	Fixed 1:4.0.1+dfsg-2.1ubuntu2+esm2

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Severity score breakdown

CVSS version:

Base score 2.1 · Low

Base metrics

Parameter	Value
Attack vector	Local
Attack complexity	Low
Attack requirements	Present
Privileges required	None
User interaction	None
Vulnerable system - Confidentiality impact	None
Vulnerable system - Integrity impact	Low
Vulnerable system - Availability impact	Low
Subsequent system - Confidentiality impact	None
Subsequent system - Integrity impact	None
Subsequent system - Availability impact	Low

Scores

Parameter	Value
Base score	2.1 · Low
Base + Threat score	-
Base + Environmental score	-
Base + Threat + Environmental score	-

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

Base score 9.1 · Critical