[USN-7874-1] Linux kernel vulnerabilities
Rodrigo Figueiredo Zaiden
rodrigo.zaiden at canonical.com
Wed Nov 19 17:46:22 UTC 2025
==========================================================================
Ubuntu Security Notice USN-7874-1
November 19, 2025
linux, linux-aws, linux-aws-5.4, linux-gcp, linux-gcp-5.4, linux-hwe-5.4,
linux-ibm, linux-ibm-5.4, linux-kvm, linux-oracle, linux-oracle-5.4,
linux-raspi, linux-raspi-5.4, linux-xilinx-zynqmp vulnerabilities
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 20.04 LTS
- Ubuntu 18.04 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-gcp: Linux kernel for Google Cloud Platform (GCP) systems
- linux-ibm: Linux kernel for IBM cloud systems
- linux-kvm: Linux kernel for cloud environments
- linux-oracle: Linux kernel for Oracle Cloud systems
- linux-raspi: Linux kernel for Raspberry Pi systems
- linux-xilinx-zynqmp: Linux kernel for Xilinx ZynqMP processors
- linux-aws-5.4: Linux kernel for Amazon Web Services (AWS) systems
- linux-gcp-5.4: Linux kernel for Google Cloud Platform (GCP) systems
- linux-hwe-5.4: Linux hardware enablement (HWE) kernel
- linux-ibm-5.4: Linux kernel for IBM cloud systems
- linux-oracle-5.4: Linux kernel for Oracle Cloud systems
- linux-raspi-5.4: Linux kernel for Raspberry Pi systems
Details:
Jean-Claude Graf, Sandro Rüegge, Ali Hajiabadi, and Kaveh Razavi discovered
that the Linux kernel contained insufficient branch predictor isolation
between a guest and a userspace hypervisor for certain processors. This
flaw is known as VMSCAPE. An attacker in a guest VM could possibly use this
to expose sensitive information from the host OS. (CVE-2025-40300)
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:
- HSI subsystem;
- I3C subsystem;
- SMB network file system;
- Padata parallel execution mechanism;
- Timer subsystem;
- Networking core;
(CVE-2023-52854, CVE-2024-35867, CVE-2024-50061, CVE-2024-56664,
CVE-2025-21727, CVE-2025-37838, CVE-2025-38352)
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 20.04 LTS
linux-image-5.4.0-1070-xilinx-zynqmp 5.4.0-1070.74
Available with Ubuntu Pro
linux-image-5.4.0-1098-ibm 5.4.0-1098.103
Available with Ubuntu Pro
linux-image-5.4.0-1135-raspi 5.4.0-1135.148
Available with Ubuntu Pro
linux-image-5.4.0-1139-kvm 5.4.0-1139.148
Available with Ubuntu Pro
linux-image-5.4.0-1150-oracle 5.4.0-1150.160
Available with Ubuntu Pro
linux-image-5.4.0-1152-aws 5.4.0-1152.162
Available with Ubuntu Pro
linux-image-5.4.0-1155-gcp 5.4.0-1155.164
Available with Ubuntu Pro
linux-image-5.4.0-223-generic 5.4.0-223.243
Available with Ubuntu Pro
linux-image-5.4.0-223-generic-lpae 5.4.0-223.243
Available with Ubuntu Pro
linux-image-5.4.0-223-lowlatency 5.4.0-223.243
Available with Ubuntu Pro
linux-image-aws-5.4 5.4.0.1152.149
Available with Ubuntu Pro
linux-image-aws-lts-20.04 5.4.0.1152.149
Available with Ubuntu Pro
linux-image-gcp-5.4 5.4.0.1155.157
Available with Ubuntu Pro
linux-image-gcp-lts-20.04 5.4.0.1155.157
Available with Ubuntu Pro
linux-image-generic 5.4.0.223.215
Available with Ubuntu Pro
linux-image-generic-5.4 5.4.0.223.215
Available with Ubuntu Pro
linux-image-generic-lpae 5.4.0.223.215
Available with Ubuntu Pro
linux-image-generic-lpae-5.4 5.4.0.223.215
Available with Ubuntu Pro
linux-image-ibm-5.4 5.4.0.1098.127
Available with Ubuntu Pro
linux-image-ibm-lts-20.04 5.4.0.1098.127
Available with Ubuntu Pro
linux-image-kvm 5.4.0.1139.135
Available with Ubuntu Pro
linux-image-kvm-5.4 5.4.0.1139.135
Available with Ubuntu Pro
linux-image-lowlatency 5.4.0.223.215
Available with Ubuntu Pro
linux-image-lowlatency-5.4 5.4.0.223.215
Available with Ubuntu Pro
linux-image-oem 5.4.0.223.215
Available with Ubuntu Pro
linux-image-oem-osp1 5.4.0.223.215
Available with Ubuntu Pro
linux-image-oracle-5.4 5.4.0.1150.144
Available with Ubuntu Pro
linux-image-oracle-lts-20.04 5.4.0.1150.144
Available with Ubuntu Pro
linux-image-raspi 5.4.0.1135.166
Available with Ubuntu Pro
linux-image-raspi-5.4 5.4.0.1135.166
Available with Ubuntu Pro
linux-image-raspi2 5.4.0.1135.166
Available with Ubuntu Pro
linux-image-virtual 5.4.0.223.215
Available with Ubuntu Pro
linux-image-virtual-5.4 5.4.0.223.215
Available with Ubuntu Pro
linux-image-xilinx-zynqmp 5.4.0.1070.70
Available with Ubuntu Pro
linux-image-xilinx-zynqmp-5.4 5.4.0.1070.70
Available with Ubuntu Pro
Ubuntu 18.04 LTS
linux-image-5.4.0-1098-ibm 5.4.0-1098.103~18.04.1
Available with Ubuntu Pro
linux-image-5.4.0-1135-raspi 5.4.0-1135.148~18.04.1
Available with Ubuntu Pro
linux-image-5.4.0-1150-oracle 5.4.0-1150.160~18.04.1
Available with Ubuntu Pro
linux-image-5.4.0-1152-aws 5.4.0-1152.162~18.04.1
Available with Ubuntu Pro
linux-image-5.4.0-1155-gcp 5.4.0-1155.164~18.04.1
Available with Ubuntu Pro
linux-image-5.4.0-223-generic 5.4.0-223.243~18.04.1
Available with Ubuntu Pro
linux-image-5.4.0-223-lowlatency 5.4.0-223.243~18.04.1
Available with Ubuntu Pro
linux-image-aws 5.4.0.1152.162~18.04.1
Available with Ubuntu Pro
linux-image-aws-5.4 5.4.0.1152.162~18.04.1
Available with Ubuntu Pro
linux-image-gcp 5.4.0.1155.164~18.04.1
Available with Ubuntu Pro
linux-image-gcp-5.4 5.4.0.1155.164~18.04.1
Available with Ubuntu Pro
linux-image-generic-5.4 5.4.0.223.243~18.04.1
Available with Ubuntu Pro
linux-image-generic-hwe-18.04 5.4.0.223.243~18.04.1
Available with Ubuntu Pro
linux-image-ibm 5.4.0.1098.103~18.04.1
Available with Ubuntu Pro
linux-image-ibm-5.4 5.4.0.1098.103~18.04.1
Available with Ubuntu Pro
linux-image-lowlatency-5.4 5.4.0.223.243~18.04.1
Available with Ubuntu Pro
linux-image-lowlatency-hwe-18.04 5.4.0.223.243~18.04.1
Available with Ubuntu Pro
linux-image-oem 5.4.0.223.243~18.04.1
Available with Ubuntu Pro
linux-image-oem-osp1 5.4.0.223.243~18.04.1
Available with Ubuntu Pro
linux-image-oracle 5.4.0.1150.160~18.04.1
Available with Ubuntu Pro
linux-image-oracle-5.4 5.4.0.1150.160~18.04.1
Available with Ubuntu Pro
linux-image-raspi-5.4 5.4.0.1135.148~18.04.1
Available with Ubuntu Pro
linux-image-raspi-hwe-18.04 5.4.0.1135.148~18.04.1
Available with Ubuntu Pro
linux-image-snapdragon-5.4 5.4.0.223.243~18.04.1
Available with Ubuntu Pro
linux-image-snapdragon-hwe-18.04 5.4.0.223.243~18.04.1
Available with Ubuntu Pro
linux-image-virtual-5.4 5.4.0.223.243~18.04.1
Available with Ubuntu Pro
linux-image-virtual-hwe-18.04 5.4.0.223.243~18.04.1
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-7874-1
CVE-2023-52854, CVE-2024-35867, CVE-2024-50061, CVE-2024-56664,
CVE-2025-21727, CVE-2025-37838, CVE-2025-38352, CVE-2025-40300
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