Stack-based buffer overflow in jq - CVE-2026-47770

Vulnerability identifier: #VU144351

CSH Severity: Low

CVSS v4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-47770

CWE-ID: CWE-121

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a local user to cause a denial of service.

The vulnerability exists due to stack-based buffer overflow in deep structural equality when parsing input. A local user can supply specially crafted input to cause a denial of service.

jq
Debian Linux
openEuler
Anolis OS
LANTIME Operating System Firmware (LTOS)
jq (Debian package)
jq-doc
jq-devel
jq
jq-help
jq-debugsource
jq-debuginfo

Install security update from vendor's website.

jq - update to 1.8.2
LANTIME Operating System Firmware (LTOS) - update to 7.10.013
jq (Debian package) - update to 1.7.1-6+deb13u3
jq-doc - update to 1.8.2-1
jq-devel - update to 1.8.2-1
jq - update to 1.8.2-1
jq-help - update to 1.8.2-1
jq-devel - update to 1.8.2-1
jq-debugsource - update to 1.8.2-1
jq-debuginfo - update to 1.8.2-1
jq - update to 1.8.2-1

• https://github.com/jqlang/jq/security/advisories/GHSA-3pgx-frr7-3jxp

• Multiple vulnerabilities in jq
• Multiple vulnerabilities in Meinberg LANTIME firmware
• Debian update for jq
• openEuler 20.03 LTS SP4 update for jq
• openEuler 24.03 LTS SP3 update for jq
• openEuler 24.03 LTS SP1 update for jq
• openEuler 22.03 LTS SP4 update for jq
• Anolis OS update for jq