CVE-2026-41257

Name	CVE-2026-41257
Description	jq is a command-line JSON processor. In 1.8.1 and earlier, the jq bytecode VM's data stack tracks its allocation size in a signed int. When the stack grows beyond ≈1 GiB (via deeply nested generator forks), the doubling arithmetic overflows. The wrapped value is passed to realloc and then used for a memmove with attacker-influenced offsets.
Source	CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
References	DLA-4599-1
Debian Bugs	1136445

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
jq (PTS)	bullseye	1.6-2.1	vulnerable
	bullseye (security)	1.6-2.1+deb11u2	fixed
	bookworm	1.6-2.1+deb12u1	vulnerable
	trixie	1.7.1-6+deb13u2	vulnerable
	forky, sid	1.8.1-7	fixed

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
jq	source	bullseye	1.6-2.1+deb11u2		DLA-4599-1
jq	source	(unstable)	1.8.1-6			1136445

[trixie] - jq <no-dsa> (Minor issue)
[bookworm] - jq <no-dsa> (Minor issue)
https://github.com/jqlang/jq/security/advisories/GHSA-4jm8-m363-4539