Ubuntu alert USN-8143-1 (linux, linux-aws, linux-kvm, linux-lts-xenial)

From:
             
 
Rodrigo Figueiredo Zaiden <rodrigo.zaiden@canonical.com>
To:
             
 
ubuntu-security-announce@lists.ubuntu.com
Subject:
             
 
[USN-8143-1] Linux kernel vulnerabilities
Date:
             
 
Wed, 01 Apr 2026 18:17:46 -0300
Message-ID:
             
 
<8bacff31-d000-4e54-a417-8e14b14588bf@canonical.com>
==========================================================================
Ubuntu Security Notice USN-8143-1
April 01, 2026

linux, linux-aws, linux-kvm, linux-lts-xenial vulnerabilities
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 16.04 LTS
- Ubuntu 14.04 LTS

Summary:

Several security issues were fixed in the Linux kernel.

Software Description:
- linux: Linux kernel
- linux-aws: Linux kernel for Amazon Web Services (AWS) systems
- linux-kvm: Linux kernel for cloud environments
- linux-lts-xenial: Linux hardware enablement kernel from Xenial for Trusty

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:
   - Cryptographic API;
   - GPU drivers;
   - BTRFS file system;
   - GFS2 file system;
   - UDF file system;
   - NFC subsystem;
   - Network traffic control;
(CVE-2021-47142, CVE-2021-47145, CVE-2021-47254, CVE-2024-46777,
CVE-2025-21735, CVE-2026-23060, CVE-2026-23074)

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 16.04 LTS
   linux-image-4.4.0-1154-kvm      4.4.0-1154.165
                                   Available with Ubuntu Pro
   linux-image-4.4.0-1191-aws      4.4.0-1191.206
                                   Available with Ubuntu Pro
   linux-image-4.4.0-279-generic   4.4.0-279.313
                                   Available with Ubuntu Pro
   linux-image-4.4.0-279-lowlatency  4.4.0-279.313
                                   Available with Ubuntu Pro
   linux-image-aws                 4.4.0.1191.195
                                   Available with Ubuntu Pro
   linux-image-generic             4.4.0.279.285
                                   Available with Ubuntu Pro
   linux-image-generic-lts-xenial  4.4.0.279.285
                                   Available with Ubuntu Pro
   linux-image-kvm                 4.4.0.1154.151
                                   Available with Ubuntu Pro
   linux-image-lowlatency          4.4.0.279.285
                                   Available with Ubuntu Pro
   linux-image-lowlatency-lts-xenial  4.4.0.279.285
                                   Available with Ubuntu Pro
   linux-image-virtual             4.4.0.279.285
                                   Available with Ubuntu Pro
   linux-image-virtual-lts-xenial  4.4.0.279.285
                                   Available with Ubuntu Pro

Ubuntu 14.04 LTS
   linux-image-4.4.0-1153-aws      4.4.0-1153.159
                                   Available with Ubuntu Pro
   linux-image-4.4.0-279-generic   4.4.0-279.313~14.04.1+1
                                   Available with Ubuntu Pro
   linux-image-4.4.0-279-lowlatency  4.4.0-279.313~14.04.1+1
                                   Available with Ubuntu Pro
   linux-image-aws                 4.4.0.1153.150
                                   Available with Ubuntu Pro
   linux-image-generic-lts-xenial  4.4.0.279.313~14.04.1
                                   Available with Ubuntu Pro
   linux-image-lowlatency-lts-xenial  4.4.0.279.313~14.04.1
                                   Available with Ubuntu Pro
   linux-image-virtual-lts-xenial  4.4.0.279.313~14.04.1
                                   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-8143-1
   CVE-2021-47142, CVE-2021-47145, CVE-2021-47254, CVE-2024-46777,
   CVE-2025-21735, CVE-2026-23060, CVE-2026-23074



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