Canonical Ubuntu Server 26.04 LTS (Resolute Raccoon) Update Version zlib 1:1.3.dfsg+really1.3.1-1ubuntu3.2
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Update Summary
USN-8954-1 addresses a zlib heap buffer overflow triggered by certain non-blocking write operations, which could cause denial of service or arbitrary code execution on Ubuntu 26.04 LTS.
Update Details
Security
- zlib incorrectly handles certain non-blocking write operations, allowing a heap buffer overflow that could result in denial of service or arbitrary code execution.
Hints
- Apply the fix through a standard system update.
- Update Ubuntu 26.04 LTS zlib packages to version 1:1.3.dfsg+really1.3.1-1ubuntu3.2.
Product Information
Vendor: Canonical
Product: Ubuntu Server
Product type: Software
Application category: Utilities
Platform: Linux
Variant: 26.04 LTS (Resolute Raccoon)
Version: zlib 1:1.3.dfsg+really1.3.1-1ubuntu3.2
Vendor information published: Oct 22, 2026
Original release notes: View on vendor site
Published on updatealert.io: Oct 23, 2026
Description: Server operating system for Linux infrastructure and workloads.