========================================================================== Ubuntu Security Notice USN-8631-1 August 12, 2026
linux, linux-aws, linux-aws-fips, linux-azure, linux-azure-fde,
linux-azure-fips, linux-gkeop, linux-ibm, linux-ibm-5.15,
linux-intel-iot-realtime, linux-intel-iotg, linux-intel-iotg-5.15,
linux-kvm, linux-nvidia, linux-nvidia-tegra, linux-nvidia-tegra-5.15,
linux-oracle-5.15, linux-realtime, linux-xilinx-zynqmp vulnerabilities
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 22.04 LTS
- Ubuntu 20.04 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-aws-fips: Linux kernel for Amazon Web Services (AWS) systems with FIPS
- linux-azure: Linux kernel for Microsoft Azure Cloud systems
- linux-azure-fde: Linux kernel for Microsoft Azure CVM cloud systems
- linux-azure-fips: Linux kernel for Microsoft Azure Cloud systems with FIPS
- linux-gkeop: Linux kernel for Google Container Engine (GKE) systems
- linux-ibm: Linux kernel for IBM cloud systems
- linux-intel-iot-realtime: Linux kernel for Intel IoT Real-time platforms
- linux-intel-iotg: Linux kernel for Intel IoT platforms
- linux-kvm: Linux kernel for cloud environments
- linux-nvidia: Linux kernel for NVIDIA systems
- linux-nvidia-tegra: Linux kernel for NVIDIA Tegra systems
- linux-realtime: Linux kernel for Real-time systems
- linux-xilinx-zynqmp: Linux kernel for Xilinx ZynqMP processors
- linux-ibm-5.15: Linux kernel for IBM cloud systems
- linux-intel-iotg-5.15: Linux kernel for Intel IoT platforms
- linux-nvidia-tegra-5.15: Linux kernel for NVIDIA Tegra systems
- linux-oracle-5.15: Linux kernel for Oracle Cloud systems
Details:
Siebe Devroe, Héloïse Gollier, and Mathy Vanhoef discovered that the WiFi
implementation in the Linux kernel did not properly handle aggregated
frames in mesh networks, due to an incorrect fix for CVE-2020-24588. A
physically proximate attacker could use this issue to inject packets.
(CVE-2025-27558)
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:
- x86 architecture;
- InfiniBand drivers;
- Network drivers;
- NVME drivers;
- Ext4 file system;
- SMB network file system;
- IPv4 networking;
- Network traffic control;
- TCP network protocol;
- Locking primitives;
- IPv6 networking;
- Multipath TCP;
- Netfilter;
- SCTP protocol;
- SMC sockets;
(CVE-2026-31414, CVE-2026-31448, CVE-2026-31705, CVE-2026-43198,
CVE-2026-43378, CVE-2026-43499, CVE-2026-46266, CVE-2026-46331,
CVE-2026-52924, CVE-2026-52989, CVE-2026-53086, CVE-2026-53176,
CVE-2026-53212, CVE-2026-53215, CVE-2026-53225, CVE-2026-53228,
CVE-2026-53359)
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 22.04 LTS
linux-image-5.15.0-1065-nvidia-tegra 5.15.0-1065.67
linux-image-5.15.0-1065-nvidia-tegra-rt 5.15.0-1065.67
linux-image-5.15.0-1076-xilinx-zynqmp 5.15.0-1076.80
linux-image-5.15.0-1096-gkeop 5.15.0-1096.104
linux-image-5.15.0-1105-intel-iot-realtime 5.15.0-1105.107
Available with Ubuntu Pro
linux-image-5.15.0-1105-kvm 5.15.0-1105.110
linux-image-5.15.0-1107-ibm 5.15.0-1107.111
linux-image-5.15.0-1108-intel-iotg 5.15.0-1108.114
linux-image-5.15.0-1108-nvidia 5.15.0-1108.109
linux-image-5.15.0-1108-nvidia-lowlatency 5.15.0-1108.109
linux-image-5.15.0-1112-realtime 5.15.0-1112.121
Available with Ubuntu Pro
linux-image-5.15.0-1113-aws 5.15.0-1113.120
linux-image-5.15.0-1113-aws-64k 5.15.0-1113.120
linux-image-5.15.0-1113-aws-fips 5.15.0-1113.120+fips1
Available with Ubuntu Pro
linux-image-5.15.0-1118-azure 5.15.0-1118.127
linux-image-5.15.0-1118-azure-fde 5.15.0-1118.127
linux-image-5.15.0-1118-azure-fips 5.15.0-1118.127+fips1
Available with Ubuntu Pro
linux-image-5.15.0-187-generic 5.15.0-187.197
linux-image-5.15.0-187-generic-64k 5.15.0-187.197
linux-image-5.15.0-187-generic-lpae 5.15.0-187.197
linux-image-aws-5.15 5.15.0.1113.116
linux-image-aws-64k-5.15 5.15.0.1113.116
linux-image-aws-64k-lts-22.04 5.15.0.1113.116
linux-image-aws-fips 5.15.0.1113.109
Available with Ubuntu Pro
linux-image-aws-fips-5.15 5.15.0.1113.109
Available with Ubuntu Pro
linux-image-aws-lts-22.04 5.15.0.1113.116
linux-image-azure-5.15 5.15.0.1118.116
linux-image-azure-fde-5.15 5.15.0.1118.127
linux-image-azure-fde-lts-22.04 5.15.0.1118.127
linux-image-azure-fips 5.15.0.1118.103
Available with Ubuntu Pro
linux-image-azure-fips-5.15 5.15.0.1118.103
Available with Ubuntu Pro
linux-image-azure-lts-22.04 5.15.0.1118.116
linux-image-generic 5.15.0.187.167
linux-image-generic-5.15 5.15.0.187.167
linux-image-generic-64k 5.15.0.187.167
linux-image-generic-64k-5.15 5.15.0.187.167
linux-image-generic-lpae 5.15.0.187.167
linux-image-generic-lpae-5.15 5.15.0.187.167
linux-image-gkeop 5.15.0.1096.95
linux-image-gkeop-5.15 5.15.0.1096.95
linux-image-ibm 5.15.0.1107.104
linux-image-ibm-5.15 5.15.0.1107.104
linux-image-intel-iot-realtime 5.15.0.1105.109
Available with Ubuntu Pro
linux-image-intel-iot-realtime-5.15 5.15.0.1105.109
Available with Ubuntu Pro
linux-image-intel-iotg 5.15.0.1108.107
linux-image-intel-iotg-5.15 5.15.0.1108.107
linux-image-kvm 5.15.0.1105.101
linux-image-kvm-5.15 5.15.0.1105.101
linux-image-nvidia 5.15.0.1108.108
linux-image-nvidia-5.15 5.15.0.1108.108
linux-image-nvidia-lowlatency 5.15.0.1108.108
linux-image-nvidia-lowlatency-5.15 5.15.0.1108.108
linux-image-nvidia-tegra 5.15.0.1065.65
linux-image-nvidia-tegra-5.15 5.15.0.1065.65
linux-image-nvidia-tegra-rt 5.15.0.1065.65
linux-image-nvidia-tegra-rt-5.15 5.15.0.1065.65
linux-image-realtime 5.15.0.1112.116
Available with Ubuntu Pro
linux-image-realtime-5.15 5.15.0.1112.116
Available with Ubuntu Pro
linux-image-virtual 5.15.0.187.167
linux-image-virtual-5.15 5.15.0.187.167
linux-image-xilinx-zynqmp 5.15.0.1076.79
linux-image-xilinx-zynqmp-5.15 5.15.0.1076.79
Ubuntu 20.04 LTS
linux-image-5.15.0-1065-nvidia-tegra 5.15.0-1065.67~20.04.1
Available with Ubuntu Pro
linux-image-5.15.0-1065-nvidia-tegra-rt 5.15.0-1065.67~20.04.1
Available with Ubuntu Pro
linux-image-5.15.0-1107-ibm 5.15.0-1107.111~20.04.1
Available with Ubuntu Pro
linux-image-5.15.0-1108-intel-iotg 5.15.0-1108.114~20.04.1
Available with Ubuntu Pro
linux-image-5.15.0-1110-oracle 5.15.0-1110.116~20.04.1
Available with Ubuntu Pro
linux-image-ibm 5.15.0.1107.111~20.04.1
Available with Ubuntu Pro
linux-image-ibm-5.15 5.15.0.1107.111~20.04.1
Available with Ubuntu Pro
linux-image-intel 5.15.0.1108.114~20.04.1
Available with Ubuntu Pro
linux-image-intel-iotg 5.15.0.1108.114~20.04.1
Available with Ubuntu Pro
linux-image-intel-iotg-5.15 5.15.0.1108.114~20.04.1
Available with Ubuntu Pro
linux-image-nvidia-tegra 5.15.0.1065.67~20.04.1
Available with Ubuntu Pro
linux-image-nvidia-tegra-5.15 5.15.0.1065.67~20.04.1
Available with Ubuntu Pro
linux-image-nvidia-tegra-rt 5.15.0.1065.67~20.04.1
Available with Ubuntu Pro
linux-image-nvidia-tegra-rt-5.15 5.15.0.1065.67~20.04.1
Available with Ubuntu Pro
linux-image-oracle 5.15.0.1110.116~20.04.1
Available with Ubuntu Pro
linux-image-oracle-5.15 5.15.0.1110.116~20.04.1
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-8631-1
CVE-2025-27558, CVE-2026-31414, CVE-2026-31448, CVE-2026-31705,
CVE-2026-43198, CVE-2026-43378, CVE-2026-43499, CVE-2026-46266,
CVE-2026-46331, CVE-2026-52924, CVE-2026-52989, CVE-2026-53086,
CVE-2026-53176, CVE-2026-53212, CVE-2026-53215, CVE-2026-53225,
CVE-2026-53228, CVE-2026-53359
Package Information:
https://launchpad.net/ubuntu/+source/linux/5.15.0-187.197
https://launchpad.net/ubuntu/+source/linux-aws/5.15.0-1113.120
https://launchpad.net/ubuntu/+source/linux-aws-fips/5.15.0-1113.120+fips1
https://launchpad.net/ubuntu/+source/linux-azure/5.15.0-1118.127
https://launchpad.net/ubuntu/+source/linux-azure-fde/5.15.0-1118.127
https://launchpad.net/ubuntu/+source/linux-azure-fips/5.15.0-1118.127+fips1
https://launchpad.net/ubuntu/+source/linux-gkeop/5.15.0-1096.104
https://launchpad.net/ubuntu/+source/linux-ibm/5.15.0-1107.111
https://launchpad.net/ubuntu/+source/linux-intel-iot-realtime/5.15.0-1105.107
https://launchpad.net/ubuntu/+source/linux-intel-iotg/5.15.0-1108.114 https://launchpad.net/ubuntu/+source/linux-kvm/5.15.0-1105.110 https://launchpad.net/ubuntu/+source/linux-nvidia/5.15.0-1108.109 https://launchpad.net/ubuntu/+source/linux-nvidia-tegra/5.15.0-1065.67 https://launchpad.net/ubuntu/+source/linux-realtime/5.15.0-1112.121 https://launchpad.net/ubuntu/+source/linux-xilinx-zynqmp/5.15.0-1076.80
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