UnratedRed Hat & Ubuntu Linux

XZ Utils vulnerability

USN-8362-1 Published Jun 2, 2026

CVE-2026-34743

Affected products & platforms

Red Hat & Ubuntu LinuxUnclassified

Summary

It was discovered that XZ Utils did not properly manage memory when attempting to append data to a decoded index that contained no records. An attacker could possibly use this issue to cause XZ Utils to crash, resulting in a denial of service, or execute arbitrary code. Affected Ubuntu releases: 25.10, 24.04, 22.04, 20.04, 18.04, 16.04, 14.04. CVEs: CVE-2026-34743.

Affected versions

Ubuntu 25.10
Ubuntu 24.04
Ubuntu 22.04
Ubuntu 20.04
Ubuntu 18.04
Ubuntu 16.04
Ubuntu 14.04

Official advisory · medium-confidence parse· fetched 3 hours ago·verify at source

Mitigation checklist

Recommended fix / mitigation

Apply available updates: `sudo apt update && sudo apt upgrade` (a standard system update installs the fix).

Official advisory · medium-confidence parse· fetched 3 hours ago·verify at source

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