Medium [CVE-2026-34743] Denial of Service via buffer overflow in index decoding
This medium-severity Red Hat Linux advisory covers CVE-2026-34743 affecting xz-main, Red Hat Enterprise Linux.
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Summary
Denial of Service via buffer overflow in index decoding. Red Hat rates this moderate (CVSS 5.3).
Weakness: CWE-131. Affected package(s): xz-main.
Resolved in Red Hat advisory RHSA-2026:7647 — update the affected packages (`sudo dnf update`).
Affected products named by the advisory: Red Hat Enterprise Linux.
- xz-main-5.8.3-1.1.hum1
Official advisory · high-confidence parse· fetched 2 months ago·verify at source
- RHSA-2026:7647
Official advisory · high-confidence parse· fetched 2 months ago·verify at source
Mitigation checklist
- Update the affected package(s) to the fixed version shipped in RHSA-2026:7647 (`sudo dnf update` / `yum update`).
Official advisory · high-confidence parse· fetched 2 months ago·verify at source
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