Home / mailings [USN-7796-1] Linux kernel vulnerabilities
Posted on 02 October 2025
Ubuntu Security==========================================================================Ubuntu Security Notice USN-7796-1
October 02, 2025
linux, linux-aws, linux-aws-hwe, linux-azure, linux-azure-4.15, linux-gcp,
linux-gcp-4.15, linux-hwe, linux-oracle 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: Linux kernel
- linux-aws: Linux kernel for Amazon Web Services (AWS) systems
- linux-azure-4.15: Linux kernel for Microsoft Azure Cloud systems
- linux-gcp-4.15: Linux kernel for Google Cloud Platform (GCP) systems
- linux-oracle: Linux kernel for Oracle Cloud systems
- linux-aws-hwe: Linux kernel for Amazon Web Services (AWS-HWE) systems
- linux-azure: Linux kernel for Microsoft Azure Cloud 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:
- Framebuffer layer;
- BTRFS file system;
- Ext4 file system;
- Network file system (NFS) server daemon;
- Packet sockets;
- Network traffic control;
- VMware vSockets driver;
(CVE-2025-21796, CVE-2025-38477, CVE-2025-38617, CVE-2025-37785,
CVE-2024-49924, CVE-2025-38618, CVE-2024-35849)
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 18.04 LTS
linux-image-4.15.0-1147-oracle 4.15.0-1147.158
Available with Ubuntu Pro
linux-image-4.15.0-1178-gcp 4.15.0-1178.195
Available with Ubuntu Pro
linux-image-4.15.0-1185-aws 4.15.0-1185.198
Available with Ubuntu Pro
linux-image-4.15.0-1193-azure 4.15.0-1193.208
Available with Ubuntu Pro
linux-image-4.15.0-242-generic 4.15.0-242.254
Available with Ubuntu Pro
linux-image-4.15.0-242-lowlatency 4.15.0-242.254
Available with Ubuntu Pro
linux-image-aws-4.15 4.15.0.1185.183
Available with Ubuntu Pro
linux-image-aws-lts-18.04 4.15.0.1185.183
Available with Ubuntu Pro
linux-image-azure-4.15 4.15.0.1193.161
Available with Ubuntu Pro
linux-image-azure-lts-18.04 4.15.0.1193.161
Available with Ubuntu Pro
linux-image-gcp-4.15 4.15.0.1178.191
Available with Ubuntu Pro
linux-image-gcp-lts-18.04 4.15.0.1178.191
Available with Ubuntu Pro
linux-image-generic 4.15.0.242.226
Available with Ubuntu Pro
linux-image-lowlatency 4.15.0.242.226
Available with Ubuntu Pro
linux-image-oracle-4.15 4.15.0.1147.152
Available with Ubuntu Pro
linux-image-oracle-lts-18.04 4.15.0.1147.152
Available with Ubuntu Pro
linux-image-virtual 4.15.0.242.226
Available with Ubuntu Pro
Ubuntu 16.04 LTS
linux-image-4.15.0-1178-gcp 4.15.0-1178.195~16.04.1
Available with Ubuntu Pro
linux-image-4.15.0-1185-aws 4.15.0-1185.198~16.04.1
Available with Ubuntu Pro
linux-image-4.15.0-1193-azure 4.15.0-1193.208~16.04.1
Available with Ubuntu Pro
linux-image-4.15.0-242-generic 4.15.0-242.254~16.04.1
Available with Ubuntu Pro
linux-image-4.15.0-242-lowlatency 4.15.0-242.254~16.04.1
Available with Ubuntu Pro
linux-image-aws-hwe 4.15.0.1185.198~16.04.1
Available with Ubuntu Pro
linux-image-azure 4.15.0.1193.208~16.04.1
Available with Ubuntu Pro
linux-image-gcp 4.15.0.1178.195~16.04.1
Available with Ubuntu Pro
linux-image-generic-hwe-16.04 4.15.0.242.254~16.04.1
Available with Ubuntu Pro
linux-image-gke 4.15.0.1178.195~16.04.1
Available with Ubuntu Pro
linux-image-lowlatency-hwe-16.04 4.15.0.242.254~16.04.1
Available with Ubuntu Pro
linux-image-oem 4.15.0.242.254~16.04.1
Available with Ubuntu Pro
linux-image-virtual-hwe-16.04 4.15.0.242.254~16.04.1
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-7796-1
CVE-2024-35849, CVE-2024-49924, CVE-2025-21796, CVE-2025-37785,
CVE-2025-38477, CVE-2025-38617, CVE-2025-38618
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