Ubuntu alert USN-7797-1 (linux, linux-kvm)

From:
             
 
Giampaolo Fresi Roglia <giampaolo.fresi.roglia@canonical.com>
To:
             
 
ubuntu-security-announce@lists.ubuntu.com
Subject:
             
 
[USN-7797-1] Linux kernel vulnerabilities
Date:
             
 
Thu, 02 Oct 2025 11:53:33 +0200
Message-ID:
             
 
<87o6qp1vfm.fsf@canonical.com>
==========================================================================
Ubuntu Security Notice USN-7797-1
October 02, 2025

linux, linux-kvm vulnerabilities
==========================================================================

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

- Ubuntu 16.04 LTS

Summary:

Several security issues were fixed in the Linux kernel.

Software Description:
- linux: Linux kernel
- linux-kvm: Linux kernel for cloud environments

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:
  - Virtio block driver;
  - Media drivers;
  - Network drivers;
  - Framebuffer layer;
  - BTRFS file system;
  - Ext4 file system;
  - Network file system (NFS) server daemon;
  - Packet sockets;
  - VMware vSockets driver;
(CVE-2025-38618, CVE-2024-35849, CVE-2025-37785, CVE-2024-49924,
CVE-2025-38617, CVE-2024-27078, CVE-2021-47149, CVE-2021-47319,
CVE-2025-21796, CVE-2021-47589)

Update instructions:

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

Ubuntu 16.04 LTS
  linux-image-4.4.0-1149-kvm      4.4.0-1149.160
                                  Available with Ubuntu Pro
  linux-image-4.4.0-273-generic   4.4.0-273.307
                                  Available with Ubuntu Pro
  linux-image-4.4.0-273-lowlatency  4.4.0-273.307
                                  Available with Ubuntu Pro
  linux-image-generic             4.4.0.273.279
                                  Available with Ubuntu Pro
  linux-image-generic-lts-xenial  4.4.0.273.279
                                  Available with Ubuntu Pro
  linux-image-kvm                 4.4.0.1149.146
                                  Available with Ubuntu Pro
  linux-image-lowlatency          4.4.0.273.279
                                  Available with Ubuntu Pro
  linux-image-lowlatency-lts-xenial  4.4.0.273.279
                                  Available with Ubuntu Pro
  linux-image-virtual             4.4.0.273.279
                                  Available with Ubuntu Pro
  linux-image-virtual-lts-xenial  4.4.0.273.279
                                  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-7797-1
  CVE-2021-47149, CVE-2021-47319, CVE-2021-47589, CVE-2024-27078,
  CVE-2024-35849, CVE-2024-49924, CVE-2025-21796, CVE-2025-37785,
  CVE-2025-38617, CVE-2025-38618



Attachment: signature.asc (type=application/pgp-signature)
-----BEGIN PGP SIGNATURE-----
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=qVwL
-----END PGP SIGNATURE-----