Ubuntu Issues Linux Kernel Security Updates Across Supported Releases
Ubuntu published multiple security notices to fix Linux kernel vulnerabilities affecting a broad range of releases, including Ubuntu 14.04 LTS, 16.04 LTS, 18.04 LTS, 20.04 LTS, 22.04 LTS, 24.04 LTS, and 25.10. The Canadian Centre for Cyber Security highlighted the advisories in notices AV26-264 and AV26-296, covering Ubuntu security updates released over consecutive weekly periods.
The Cyber Centre urged users and administrators to review the referenced Ubuntu Security Notices and apply the required updates to affected systems. The advisories describe defensive patching activity for kernel flaws across supported Ubuntu versions and do not report a named threat actor, ransomware operation, or confirmed active exploitation campaign.
Timeline
Apr 27, 2026
Cyber Centre issues advisory AV26-390 for new Ubuntu kernel fixes
On 2026-04-27, the Canadian Centre for Cyber Security published advisory AV26-390 covering Ubuntu security notices issued between April 20 and April 26, 2026, for Linux kernel vulnerabilities affecting Ubuntu 18.04 LTS, 20.04 LTS, 22.04 LTS, 24.04 LTS, and 25.10. The advisory urged users and administrators to review the notices and apply the necessary updates.
Apr 20, 2026
Cyber Centre issues advisory AV26-367 for new Ubuntu kernel fixes
On 2026-04-20, the Canadian Centre for Cyber Security published advisory AV26-367 covering Ubuntu security notices issued between April 13 and April 19, 2026, for Linux kernel vulnerabilities affecting Ubuntu 14.04 LTS through Ubuntu 25.10. The advisory urged users and administrators to review the notices and apply the necessary updates.
Apr 13, 2026
Cyber Centre issues advisory AV26-338 for new Ubuntu kernel fixes
On 2026-04-13, the Canadian Centre for Cyber Security published advisory AV26-338 covering Ubuntu security notices issued between April 6 and April 12, 2026, for Linux kernel vulnerabilities affecting Ubuntu 14.04 LTS through 25.10. The advisory urged users and administrators to review the notices and apply the required updates.
Apr 7, 2026
Cyber Centre issues advisory AV26-317 for new Ubuntu kernel fixes
On 2026-04-07, the Canadian Centre for Cyber Security published advisory AV26-317 covering Ubuntu security notices issued between March 30 and April 5, 2026, for Linux kernel vulnerabilities affecting Ubuntu 14.04 LTS through 25.10. The advisory urged users and administrators to review the notices and apply the necessary updates.
Mar 30, 2026
Cyber Centre issues advisory AV26-296 for latest Ubuntu kernel fixes
On 2026-03-30, the Canadian Centre for Cyber Security published advisory AV26-296 covering Ubuntu's March 23-29 kernel vulnerability notices and recommending that administrators review and apply the updates.
Mar 23, 2026
Ubuntu publishes another round of Linux kernel security notices
Between 2026-03-23 and 2026-03-29, Ubuntu released additional security notices addressing Linux kernel vulnerabilities across multiple releases, ranging from Ubuntu 14.04 LTS through Ubuntu 25.10.
Mar 23, 2026
Cyber Centre publishes advisory AV26-264 on Ubuntu kernel updates
On 2026-03-23, the Canadian Centre for Cyber Security published advisory AV26-264 summarizing Ubuntu's March 16-22 kernel security notices and urging users and administrators to apply the required updates.
Mar 16, 2026
Ubuntu issues Linux kernel security notices for multiple releases
Between 2026-03-16 and 2026-03-22, Ubuntu published security notices to address Linux kernel vulnerabilities affecting multiple supported releases, including 16.04 LTS, 18.04 LTS, 20.04 LTS, 22.04 LTS, 24.04 LTS, and 25.10.
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