========================================================================== Ubuntu Security Notice USN-8291-2 May 22, 2026
linux-lowlatency-hwe-5.15 vulnerabilities
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 20.04 LTS
Summary:
Several security issues were fixed in the Linux kernel.
Software Description:
- linux-lowlatency-hwe-5.15: Linux low latency kernel
Details:
Several security issues were discovered in the Linux kernel.
An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:
- SMB network file system;
- Netfilter;
- io_uring subsystem;
(CVE-2024-35862, CVE-2024-50060, CVE-2026-23274, CVE-2026-23351)
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 20.04 LTS
linux-image-5.15.0-178-lowlatency 5.15.0-178.188~20.04.1
Available with Ubuntu Pro
linux-image-5.15.0-178-lowlatency-64k 5.15.0-178.188~20.04.1
Available with Ubuntu Pro
linux-image-lowlatency-5.15 5.15.0.178.188~20.04.1
Available with Ubuntu Pro
linux-image-lowlatency-64k-5.15 5.15.0.178.188~20.04.1
Available with Ubuntu Pro
linux-image-lowlatency-64k-hwe-20.04 5.15.0.178.188~20.04.1
Available with Ubuntu Pro
linux-image-lowlatency-hwe-20.04 5.15.0.178.188~20.04.1
Available with Ubuntu Pro
After a standard system update you need to reboot your computer to make
all the necessary changes.
ATTENTION: Due to an unavoidable ABI change the kernel updates have
been given a new version number, which requires you to recompile and
reinstall all third party kernel modules you might have installed.
Unless you manually uninstalled the standard kernel metapackages
(e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual,
linux-powerpc), a standard system upgrade will automatically perform
this as well.
References:
https://ubuntu.com/security/notices/USN-8291-2
https://ubuntu.com/security/notices/USN-8291-1
CVE-2024-35862, CVE-2024-50060, CVE-2026-23274, CVE-2026-23351
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