Canonical Ubuntu Server 22.04 LTS (Jammy Jellyfish) Update Version libc-ares2 1.18.1-1ubuntu0.22.04.4
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Update Summary
USN-8951-1 fixes a c-ares DNS parsing vulnerability on Ubuntu 22.04 LTS that could allow remote attackers to cause excessive resource consumption and denial of service.
Update Details
Security
- CVE-2026-69184: c-ares did not properly limit DNS compression pointer hops or assembled name lengths when parsing DNS names, potentially allowing remote attackers to cause excessive resource consumption and denial of service.
Hints
- Install the update through a standard system update. Ubuntu 22.04 LTS systems should update libc-ares2 to version 1.18.1-1ubuntu0.22.04.4.
Product Information
Vendor: Canonical
Product: Ubuntu Server
Product type: Software
Application category: Utilities
Platform: Linux
Variant: 22.04 LTS (Jammy Jellyfish)
Version: libc-ares2 1.18.1-1ubuntu0.22.04.4
Vendor information published: Oct 21, 2026
Original release notes: View on vendor site
Published on updatealert.io: Oct 22, 2026
Description: Server operating system for Linux infrastructure and workloads.