Ubuntu 24.04 LTS Linux Kernel Critical Update USN-8636-1 CVE-2026

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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; - Netfilt... Read the Full Advisory

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

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:

- InfiniBand drivers;

- Mellanox network drivers;

- Texas Instruments network drivers;

- File systems infrastructure;

- SMB network file system;

- Network traffic control;

- TCP network protocol;

- Locking primitives;

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.

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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

Ubuntu Security Notice USN-8636-1

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