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[USN-7907-3] Linux kernel vulnerabilities

Posted on 04 December 2025
Ubuntu Security

==========================================================================Ubuntu Security Notice USN-7907-3
December 04, 2025

linux-gcp, linux-gcp-4.15, linux-hwe vulnerabilities
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS

Summary:

Several security issues were fixed in the Linux kernel.

Software Description:
- linux-gcp-4.15: Linux kernel for Google Cloud Platform (GCP) systems
- linux-gcp: Linux kernel for Google Cloud Platform (GCP) systems
- linux-hwe: Linux hardware enablement (HWE) 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:
- Cryptographic API;
- ACPI drivers;
- Hardware monitoring drivers;
- InfiniBand drivers;
- Mailbox framework;
- Network drivers;
- AFS file system;
- Ceph distributed file system;
- Network file system (NFS) server daemon;
- NILFS2 file system;
- File systems infrastructure;
- KVM subsystem;
- L3 Master device support module;
- Tracing infrastructure;
- Memory management;
- Appletalk network protocol;
- Netfilter;
- Open vSwitch;
(CVE-2021-47385, CVE-2022-49026, CVE-2022-49390, CVE-2024-49935,
CVE-2024-49963, CVE-2024-50067, CVE-2024-50095, CVE-2024-50179,
CVE-2024-53090, CVE-2024-53112, CVE-2024-53217, CVE-2024-58083,
CVE-2025-21715, CVE-2025-21722, CVE-2025-21761, CVE-2025-21791,
CVE-2025-21811, CVE-2025-21855, CVE-2025-37958, CVE-2025-38666,
CVE-2025-39964, CVE-2025-40018)

Update instructions:

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

Ubuntu 18.04 LTS
linux-image-4.15.0-1180-gcp 4.15.0-1180.197
Available with Ubuntu Pro
linux-image-gcp-4.15 4.15.0.1180.193
Available with Ubuntu Pro
linux-image-gcp-lts-18.04 4.15.0.1180.193
Available with Ubuntu Pro

Ubuntu 16.04 LTS
linux-image-4.15.0-1180-gcp 4.15.0-1180.197~16.04.1
Available with Ubuntu Pro
linux-image-4.15.0-245-generic 4.15.0-245.257~16.04.1
Available with Ubuntu Pro
linux-image-4.15.0-245-lowlatency 4.15.0-245.257~16.04.1
Available with Ubuntu Pro
linux-image-gcp 4.15.0.1180.197~16.04.1
Available with Ubuntu Pro
linux-image-generic-hwe-16.04 4.15.0.245.257~16.04.1
Available with Ubuntu Pro
linux-image-gke 4.15.0.1180.197~16.04.1
Available with Ubuntu Pro
linux-image-lowlatency-hwe-16.04 4.15.0.245.257~16.04.1
Available with Ubuntu Pro
linux-image-oem 4.15.0.245.257~16.04.1
Available with Ubuntu Pro
linux-image-virtual-hwe-16.04 4.15.0.245.257~16.04.1
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-7907-3
https://ubuntu.com/security/notices/USN-7907-2
https://ubuntu.com/security/notices/USN-7907-1
CVE-2021-47385, CVE-2022-49026, CVE-2022-49390, CVE-2024-49935,
CVE-2024-49963, CVE-2024-50067, CVE-2024-50095, CVE-2024-50179,
CVE-2024-53090, CVE-2024-53112, CVE-2024-53217, CVE-2024-58083,
CVE-2025-21715, CVE-2025-21722, CVE-2025-21761, CVE-2025-21791,
CVE-2025-21811, CVE-2025-21855, CVE-2025-37958, CVE-2025-38666,
CVE-2025-39964, CVE-2025-40018


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