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[USN-7797-2] Linux kernel vulnerabilities

Posted on 02 October 2025
Ubuntu Security

==========================================================================Ubuntu Security Notice USN-7797-2
October 02, 2025

linux-aws, linux-lts-xenial vulnerabilities
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 14.04 LTS

Summary:

Several security issues were fixed in the Linux kernel.

Software Description:
- linux-aws: Linux kernel for Amazon Web Services (AWS) systems
- 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:
- 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-2024-49924, CVE-2021-47149, CVE-2025-21796, CVE-2025-38617,
CVE-2021-47589, CVE-2021-47319, CVE-2024-27078, CVE-2025-38618,
CVE-2025-37785, CVE-2024-35849)

Update instructions:

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

Ubuntu 14.04 LTS
linux-image-4.4.0-1148-aws 4.4.0-1148.154
Available with Ubuntu Pro
linux-image-4.4.0-273-generic 4.4.0-273.307~14.04.1
Available with Ubuntu Pro
linux-image-4.4.0-273-lowlatency 4.4.0-273.307~14.04.1
Available with Ubuntu Pro
linux-image-aws 4.4.0.1148.145
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-7797-2
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


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