Ubuntu alert USN-8291-2 (linux-lowlatency-hwe-5.15)

From:
             
 
Rodrigo Figueiredo Zaiden <rodrigo.zaiden@canonical.com>
To:
             
 
ubuntu-security-announce@lists.ubuntu.com
Subject:
             
 
[USN-8291-2] Linux kernel (Low Latency) vulnerabilities
Date:
             
 
Fri, 22 May 2026 11:39:42 -0300
Message-ID:
             
 
<dc9f4c61-f661-4ffe-816f-2d72eb42534f@canonical.com>
==========================================================================
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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