Medium [CVE-2026-54679] Denial of Service via integer overflow and buffer overrun on 32-bit systems
This medium-severity Red Hat Linux advisory covers CVE-2026-54679 affecting Red Hat Hardened Images, Red Hat Ansible Automation Platform 2, Red Hat Ceph Storage 4.
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Summary
jq is a command-line JSON processor. Prior to 1.8.2, on 32bit system, jvp_string_append has a chance of integer/multiple overflowing and then causing a massive buffer overrun.
This vulnerability is fixed in 1.8.2. On 32-bit systems, a local attacker could exploit an integer overflow vulnerability in the `jvp_string_append` function.
This could lead to a massive buffer overrun, resulting in a denial of service (DoS) condition. Red Hat severity: Moderate — CVSS 5.5 (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H).
Weakness: CWE-190. Affected Red Hat products: Red Hat Hardened Images; Red Hat Ansible Automation Platform 2; Red Hat Ceph Storage 4; Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9; Red Hat OpenShift Container Platform 4.
Red Hat fixing advisory: RHSA-2026:29986.
Affected products named by the advisory: Red Hat package: jq.
- < 1.8.2
Official advisory · high-confidence parse· fetched 14 days ago·verify at source
- 1.8.2
- jq-main-1.8.2-0.1.hum1
- RHSA-2026:29986
Official advisory · high-confidence parse· fetched 14 days ago·verify at source
Mitigation checklist
- Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.
Official advisory · high-confidence parse· fetched 14 days ago·verify at source
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