========================================================================== Ubuntu Security Notice USN-8636-1 August 12, 2026
linux-azure-6.17, linux-gcp-6.17, linux-hwe-6.17, linux-oem-6.17,
linux-realtime-6.17 vulnerabilities
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 24.04 LTS
Summary:
Several security issues were fixed in the Linux kernel.
Software Description:
- linux-azure-6.17: Linux kernel for Microsoft Azure cloud systems
- linux-gcp-6.17: Linux kernel for Google Cloud Platform (GCP) systems
- linux-hwe-6.17: Linux hardware enablement (HWE) kernel
- linux-oem-6.17: Linux kernel for OEM systems
- linux-realtime-6.17: Linux kernel for Real-time 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:
- x86 architecture;
- InfiniBand drivers;
- Media drivers;
- Network drivers;
- Mellanox network drivers;
- Texas Instruments network drivers;
- NVME drivers;
- File systems infrastructure;
- SMB network file system;
- IPv4 networking;
- Network traffic control;
- TCP network protocol;
- Locking primitives;
- Memory management;
- IPv6 networking;
- Multipath TCP;
- Netfilter;
- RxRPC session sockets;
- SCTP protocol;
- SMC sockets;
(CVE-2026-31405, CVE-2026-31414, CVE-2026-31501, CVE-2026-31589,
CVE-2026-31633, CVE-2026-31636, CVE-2026-31705, CVE-2026-43198,
CVE-2026-43379, CVE-2026-43465, CVE-2026-43499, CVE-2026-46113,
CVE-2026-46137, CVE-2026-46242, CVE-2026-46331, CVE-2026-52924,
CVE-2026-52989, CVE-2026-53086, CVE-2026-53131, CVE-2026-53176,
CVE-2026-53212, 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 24.04 LTS
linux-image-6.17.0-1019-realtime 6.17.0-1019.22
Available with Ubuntu Pro
linux-image-6.17.0-1022-azure 6.17.0-1022.22
linux-image-6.17.0-1022-gcp 6.17.0-1022.25
linux-image-6.17.0-1022-gcp-64k 6.17.0-1022.25
linux-image-6.17.0-1032-oem 6.17.0-1032.32
linux-image-6.17.0-42-generic 6.17.0-42.42+1
linux-image-6.17.0-42-generic-64k 6.17.0-42.42+1
linux-image-azure 6.17.0-1022.22
linux-image-azure-6.17 6.17.0-1022.22
linux-image-gcp 6.17.0-1022.25
linux-image-gcp-6.17 6.17.0-1022.25
linux-image-gcp-64k 6.17.0-1022.25
linux-image-gcp-64k-6.17 6.17.0-1022.25
linux-image-generic-6.17 6.17.0-42.42
linux-image-generic-64k-6.17 6.17.0-42.42
linux-image-oem-24.04 6.17.0-1032.32
linux-image-oem-24.04a 6.17.0-1032.32
linux-image-oem-24.04b 6.17.0-1032.32
linux-image-oem-24.04c 6.17.0-1032.32
linux-image-oem-24.04d 6.17.0-1032.32
linux-image-oem-6.17 6.17.0-1032.32
linux-image-realtime-6.17 6.17.0-1019.22
Available with Ubuntu Pro
linux-image-realtime-hwe-24.04 6.17.0-1019.22
Available with Ubuntu Pro
linux-image-virtual-6.17 6.17.0-42.42
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-8636-1
CVE-2026-31405, CVE-2026-31414, CVE-2026-31501, CVE-2026-31589,
CVE-2026-31633, CVE-2026-31636, CVE-2026-31705, CVE-2026-43198,
CVE-2026-43379, CVE-2026-43465, CVE-2026-43499, CVE-2026-46113,
CVE-2026-46137, CVE-2026-46242, CVE-2026-46331, CVE-2026-52924,
CVE-2026-52989, CVE-2026-53086, CVE-2026-53131, CVE-2026-53176,
CVE-2026-53212, CVE-2026-53225, CVE-2026-53228, CVE-2026-53359
Package Information:
https://launchpad.net/ubuntu/+source/linux-azure-6.17/6.17.0-1022.22
https://launchpad.net/ubuntu/+source/linux-gcp-6.17/6.17.0-1022.25
https://launchpad.net/ubuntu/+source/linux-hwe-6.17/6.17.0-42.42
https://launchpad.net/ubuntu/+source/linux-oem-6.17/6.17.0-1032.32
https://launchpad.net/ubuntu/+source/linux-realtime-6.17/6.17.0-1019.22
OpenPGP_signature.asc
Description: OpenPGP digital signature
