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Canonical Ubuntu Server 22.04 LTS (Jammy Jellyfish) Update Version 5.34.0-3ubuntu1.9

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Update Summary

USN-8736-1 addresses Perl security issues in Ubuntu Server 22.04 LTS (jammy), including CVE-2026-15534 and CVE-2026-19487. The update fixes out-of-bounds memory access in regex handling and a flaw that could bypass security restrictions.

Update Details

Security

  • Perl regex handling could allow out-of-bounds heap reads or writes, leading to denial of service or arbitrary code execution (CVE-2026-15534).
  • Perl regex alternative branch handling could produce incorrect matches and allow security restriction bypasses (CVE-2026-19487).

Hints

  • A standard system update installs the required fixes.
  • For Ubuntu 22.04 LTS jammy, update libperl-dev, libperl5.34, perl-base, and perl-debug to 5.34.0-3ubuntu1.9.

Product Information

Vendor: Canonical

Product: Ubuntu Server

Product type: Software

Application category: Utilities

Platform: Linux

Variant: 22.04 LTS (Jammy Jellyfish)

Version: 5.34.0-3ubuntu1.9

Vendor release date: Sep 8, 2026

Original release notes: View on vendor site

Published on updatealert.io: Sep 9, 2026

Description: Server operating system for Linux infrastructure and workloads.

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