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Ubuntu Security NoticesUSN-8945-1

USN-8945-1: XZ Utils vulnerability

Severity not listed 0 CVEs Published Oct 20, 2026 at 5:45 PM UTC

Summary

It was discovered that XZ Utils incorrectly handled certain memory allocation failures when reinitializing decoders for specific compressed file formats. An attacker could possibly use this issue to trigger an invalid memory write, resulting in a denial of service or arbitrary code execution.

Products covered

A separate affected-products list was not included in the collected bulletin.

Remediation

Separate remediation guidance was not included in the collected bulletin.

CVEs in this advisory 0

No CVE identifiers were listed in the collected bulletin.

Updates

  1. Published by Ubuntu

    The publication date reported by the vendor.

  2. Added to SecurityAlert

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  3. Confirmed at the source

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