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Ubuntu 20.04 LTS: Linux Kernel Critical Kernel Flaw Update USN-7795-1

ubuntu
Calendar Grey October 2, 2025
Dist Ubuntu Esm H88
Critical security issues in the Linux kernel for Ubuntu affect system integrity and require urgent updates.
Several security issues were fixed in the Linux kernel.

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-bluefield: Linux kernel for NVIDIA BlueField platforms

- linux-gcp: Linux kernel for Google Cloud Platform (GCP) systems

- linux-ibm: Linux kernel for IBM cloud systems

- linux-iot: Linux kernel for IoT platforms

- linux-kvm: Linux kernel for cloud environments

- 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

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:

- Ex...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory exploit Ubuntu system update high Linux kernel

Update Instructions

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

Ubuntu 20.04 LTS
  linux-image-5.4.0-1055-iot      5.4.0-1055.58
                                  Available with Ubuntu Pro
  linux-image-5.4.0-1069-xilinx-zynqmp  5.4.0-1069.73
                                  Available with Ubuntu Pro
  linux-image-5.4.0-1097-ibm      5.4.0-1097.102
                                  Available with Ubuntu Pro
  linux-image-5.4.0-1110-bluefield  5.4.0-1110.117
                                  Available with Ubuntu Pro
  linux-image-5.4.0-1134-raspi    5.4.0-1134.147
                                  Available with Ubuntu Pro
  linux-image-5.4.0-1138-kvm      5.4.0-1138.147
                                  Available with Ubuntu Pro
  linux-image-5.4.0-1151-aws      5.4.0-1151.161
                                  Available with Ubuntu Pro
  linux-image-5.4.0-1154-gcp      5.4.0-1154.163
                                  Available with Ubuntu Pro
  linux-image-5.4.0-222-generic   5.4.0-222.242
                                  Available with Ubuntu Pro
  linux-image-5.4.0-222-generic-lpae  5.4.0-222.242
                                  Available with Ubuntu Pro
  linux-image-5.4.0-222-lowlatency  5.4.0-222.242
                                  Available with Ubuntu Pro
  linux-image-aws-5.4             5.4.0.1151.148
                                  Available with Ubuntu Pro
  linux-image-aws-lts-20.04       5.4.0.1151.148
                                  Available with Ubuntu Pro
  linux-image-bluefield           5.4.0.1110.106
                                  Available with Ubuntu Pro
  linux-image-bluefield-5.4       5.4.0.1110.106
                                  Available with Ubuntu Pro
  linux-image-gcp-5.4             5.4.0.1154.156
                                  Available with Ubuntu Pro
  linux-image-gcp-lts-20.04       5.4.0.1154.156
                                  Available with Ubuntu Pro
  linux-image-generic             5.4.0.222.214
                                  Available with Ubuntu Pro
  linux-image-generic-5.4         5.4.0.222.214
                                  Available with Ubuntu Pro
  linux-image-generic-lpae        5.4.0.222.214
                                  Available with Ubuntu Pro
  linux-image-generic-lpae-5.4    5.4.0.222.214
                                  Available with Ubuntu Pro
  linux-image-ibm-5.4             5.4.0.1097.126
                                  Available with Ubuntu Pro
  linux-image-ibm-lts-20.04       5.4.0.1097.126
                                  Available with Ubuntu Pro
  linux-image-kvm                 5.4.0.1138.134
                                  Available with Ubuntu Pro
  linux-image-kvm-5.4             5.4.0.1138.134
                                  Available with Ubuntu Pro
  linux-image-lowlatency          5.4.0.222.214
                                  Available with Ubuntu Pro
  linux-image-lowlatency-5.4      5.4.0.222.214
                                  Available with Ubuntu Pro
  linux-image-oem                 5.4.0.222.214
                                  Available with Ubuntu Pro
  linux-image-oem-osp1            5.4.0.222.214
                                  Available with Ubuntu Pro
  linux-image-raspi               5.4.0.1134.165
                                  Available with Ubuntu Pro
  linux-image-raspi-5.4           5.4.0.1134.165
                                  Available with Ubuntu Pro
  linux-image-raspi2              5.4.0.1134.165
                                  Available with Ubuntu Pro
  linux-image-virtual             5.4.0.222.214
                                  Available with Ubuntu Pro
  linux-image-virtual-5.4         5.4.0.222.214
                                  Available with Ubuntu Pro
  linux-image-xilinx-zynqmp       5.4.0.1069.69
                                  Available with Ubuntu Pro
  linux-image-xilinx-zynqmp-5.4   5.4.0.1069.69
                                  Available with Ubuntu Pro

Ubuntu 18.04 LTS
  linux-image-5.4.0-1097-ibm      5.4.0-1097.102~18.04.1
                                  Available with Ubuntu Pro
  linux-image-5.4.0-1151-aws      5.4.0-1151.161~18.04.1
                                  Available with Ubuntu Pro
  linux-image-5.4.0-1154-gcp      5.4.0-1154.163~18.04.1
                                  Available with Ubuntu Pro
  linux-image-5.4.0-222-generic   5.4.0-222.242~18.04.1
                                  Available with Ubuntu Pro
  linux-image-5.4.0-222-lowlatency  5.4.0-222.242~18.04.1
                                  Available with Ubuntu Pro
  linux-image-aws                 5.4.0.1151.161~18.04.1
                                  Available with Ubuntu Pro
  linux-image-aws-5.4             5.4.0.1151.161~18.04.1
                                  Available with Ubuntu Pro
  linux-image-gcp                 5.4.0.1154.163~18.04.1
                                  Available with Ubuntu Pro
  linux-image-gcp-5.4             5.4.0.1154.163~18.04.1
                                  Available with Ubuntu Pro
  linux-image-generic-5.4         5.4.0.222.242~18.04.1
                                  Available with Ubuntu Pro
  linux-image-generic-hwe-18.04   5.4.0.222.242~18.04.1
                                  Available with Ubuntu Pro
  linux-image-ibm                 5.4.0.1097.102~18.04.1
                                  Available with Ubuntu Pro
  linux-image-ibm-5.4             5.4.0.1097.102~18.04.1
                                  Available with Ubuntu Pro
  linux-image-lowlatency-5.4      5.4.0.222.242~18.04.1
                                  Available with Ubuntu Pro
  linux-image-lowlatency-hwe-18.04  5.4.0.222.242~18.04.1
                                  Available with Ubuntu Pro
  linux-image-oem                 5.4.0.222.242~18.04.1
                                  Available with Ubuntu Pro
  linux-image-oem-osp1            5.4.0.222.242~18.04.1
                                  Available with Ubuntu Pro
  linux-image-snapdragon-5.4      5.4.0.222.242~18.04.1
                                  Available with Ubuntu Pro
  linux-image-snapdragon-hwe-18.04  5.4.0.222.242~18.04.1
                                  Available with Ubuntu Pro
  linux-image-virtual-5.4         5.4.0.222.242~18.04.1
                                  Available with Ubuntu Pro
  linux-image-virtual-hwe-18.04   5.4.0.222.242~18.04.1
                                  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-7795-1

CVE-2025-21796, CVE-2025-37785, CVE-2025-38477, CVE-2025-38617,

CVE-2025-38618

Severity
critical
Lowest
Low
Medium
High
Critical

Ubuntu Security Notice USN-7795-1

Topics%20covered

Topics Covered

security advisory exploit Ubuntu system update high Linux kernel

Package Information

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