1. Ubuntu Security Notices
  2. USN-8818-1

USN-8818-1: Linux kernel vulnerabilities

Publication date

24 September 2026

Overview

Several security issues were fixed in the Linux kernel.

Releases

Packages

Details

It was discovered that some Arm processors could complete a broadcast
translation lookaside buffer (TLB) invalidation before memory writes made
through the invalidated translation were globally observed. A local
attacker could possibly use this to write to memory after permission to do
so had been revoked, bypassing memory protections or escalating privileges.
(CVE-2025-10263)

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:

  • ARM64 architecture;
  • InfiniBand drivers;
  • Network drivers;
  • TCM subsystem;
  • exFAT file system;
  • Network file system (NFS) client;
  • Network file system (NFS) server daemon;
  • B.A.T.M.A.N. meshing protocol;
  • IPv4 networking;
  • IPv6 networking;
  • Netfilter;
  • RDS...

It was discovered that some Arm processors could complete a broadcast
translation lookaside buffer (TLB) invalidation before memory writes made
through the invalidated translation were globally observed. A local
attacker could possibly use this to write to memory after permission to do
so had been revoked, bypassing memory protections or escalating privileges.
(CVE-2025-10263)

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:

  • ARM64 architecture;
  • InfiniBand drivers;
  • Network drivers;
  • TCM subsystem;
  • exFAT file system;
  • Network file system (NFS) client;
  • Network file system (NFS) server daemon;
  • B.A.T.M.A.N. meshing protocol;
  • IPv4 networking;
  • IPv6 networking;
  • Netfilter;
  • RDS protocol

Update instructions

After a standard system update you need to reboot your computer to make all the necessary changes.

Learn more about how to get the fixes.

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.

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

Ubuntu Release Package Version
22.04 LTS jammy linux-image-5.15.0-1079-xilinx-zynqmp –  5.15.0-1079.83
linux-image-5.15.0-1099-gkeop –  5.15.0-1099.107
linux-image-5.15.0-1108-intel-iot-realtime –  5.15.0-1108.110  
linux-image-5.15.0-1108-kvm –  5.15.0-1108.113
linux-image-5.15.0-1110-ibm –  5.15.0-1110.114
linux-image-5.15.0-1111-intel-iotg –  5.15.0-1111.117
linux-image-5.15.0-1112-gke –  5.15.0-1112.118
linux-image-5.15.0-1113-oracle –  5.15.0-1113.119
linux-image-5.15.0-1115-realtime –  5.15.0-1115.124  
linux-image-5.15.0-1116-aws –  5.15.0-1116.123
linux-image-5.15.0-1116-aws-64k –  5.15.0-1116.123
linux-image-5.15.0-1116-aws-fips –  5.15.0-1116.123+fips1  
linux-image-5.15.0-1116-gcp-fips –  5.15.0-1116.126+fips1  
linux-image-5.15.0-1117-gcp –  5.15.0-1117.127
linux-image-5.15.0-1121-azure-fde –  5.15.0-1121.130
linux-image-5.15.0-1122-azure –  5.15.0-1122.131
linux-image-5.15.0-1122-azure-fips –  5.15.0-1122.131+fips1  
linux-image-5.15.0-194-lowlatency –  5.15.0-194.204
linux-image-5.15.0-194-lowlatency-64k –  5.15.0-194.204
linux-image-aws-5.15 –  5.15.0.1116.119
linux-image-aws-64k-5.15 –  5.15.0.1116.119
linux-image-aws-64k-lts-22.04 –  5.15.0.1116.119
linux-image-aws-fips –  5.15.0.1116.112  
linux-image-aws-fips-5.15 –  5.15.0.1116.112  
linux-image-aws-lts-22.04 –  5.15.0.1116.119
linux-image-azure-5.15 –  5.15.0.1122.120
linux-image-azure-fde-5.15 –  5.15.0.1121.130
linux-image-azure-fde-lts-22.04 –  5.15.0.1121.130
linux-image-azure-fips –  5.15.0.1122.106  
linux-image-azure-fips-5.15 –  5.15.0.1122.106  
linux-image-azure-lts-22.04 –  5.15.0.1122.120
linux-image-gcp-5.15 –  5.15.0.1117.114
linux-image-gcp-fips –  5.15.0.1116.106  
linux-image-gcp-fips-5.15 –  5.15.0.1116.106  
linux-image-gcp-lts-22.04 –  5.15.0.1117.114
linux-image-gke –  5.15.0.1112.111
linux-image-gke-5.15 –  5.15.0.1112.111
linux-image-gkeop –  5.15.0.1099.98
linux-image-gkeop-5.15 –  5.15.0.1099.98
linux-image-ibm –  5.15.0.1110.107
linux-image-ibm-5.15 –  5.15.0.1110.107
linux-image-intel-iot-realtime –  5.15.0.1108.112  
linux-image-intel-iot-realtime-5.15 –  5.15.0.1108.112  
linux-image-intel-iotg –  5.15.0.1111.110
linux-image-intel-iotg-5.15 –  5.15.0.1111.110
linux-image-kvm –  5.15.0.1108.104
linux-image-kvm-5.15 –  5.15.0.1108.104
linux-image-lowlatency –  5.15.0.194.159
linux-image-lowlatency-5.15 –  5.15.0.194.159
linux-image-lowlatency-64k –  5.15.0.194.159
linux-image-lowlatency-64k-5.15 –  5.15.0.194.159
linux-image-oracle-5.15 –  5.15.0.1113.109
linux-image-oracle-lts-22.04 –  5.15.0.1113.109
linux-image-realtime –  5.15.0.1115.119  
linux-image-realtime-5.15 –  5.15.0.1115.119  
linux-image-xilinx-zynqmp –  5.15.0.1079.82
linux-image-xilinx-zynqmp-5.15 –  5.15.0.1079.82
20.04 LTS focal linux-image-5.15.0-194-generic –  5.15.0-194.204~20.04.1  
linux-image-5.15.0-194-generic-64k –  5.15.0-194.204~20.04.1  
linux-image-5.15.0-194-generic-lpae –  5.15.0-194.204~20.04.1  
linux-image-5.15.0-194-lowlatency –  5.15.0-194.204~20.04.1  
linux-image-5.15.0-194-lowlatency-64k –  5.15.0-194.204~20.04.1  
linux-image-generic-5.15 –  5.15.0.194.204~20.04.1  
linux-image-generic-64k-5.15 –  5.15.0.194.204~20.04.1  
linux-image-generic-64k-hwe-20.04 –  5.15.0.194.204~20.04.1  
linux-image-generic-hwe-20.04 –  5.15.0.194.204~20.04.1  
linux-image-generic-lpae-5.15 –  5.15.0.194.204~20.04.1  
linux-image-generic-lpae-hwe-20.04 –  5.15.0.194.204~20.04.1  
linux-image-lowlatency-5.15 –  5.15.0.194.204~20.04.1  
linux-image-lowlatency-64k-5.15 –  5.15.0.194.204~20.04.1  
linux-image-lowlatency-64k-hwe-20.04 –  5.15.0.194.204~20.04.1  
linux-image-lowlatency-hwe-20.04 –  5.15.0.194.204~20.04.1  
linux-image-oem-20.04 –  5.15.0.194.204~20.04.1  
linux-image-oem-20.04b –  5.15.0.194.204~20.04.1  
linux-image-oem-20.04c –  5.15.0.194.204~20.04.1  
linux-image-oem-20.04d –  5.15.0.194.204~20.04.1  
linux-image-virtual-5.15 –  5.15.0.194.204~20.04.1  
linux-image-virtual-hwe-20.04 –  5.15.0.194.204~20.04.1  

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References

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