Security Advisory Desk
unratedQCS priority 70/100Ubuntu

USN-8637-1: Linux kernel (OEM) vulnerabilities

Multiple security weaknesses were found in the Linux kernel that an attacker might exploit to compromise your system. These issues affect many parts of the kernel, including hardware support and network features. Updating your system with the latest security patches will help protect you from these risks.

Published 13/8/2026, 5:59:27 pmVerified 13/8/2026, 7:42:46 pmRevision 1
Ubuntu unrated network security advisory visual

In plain language

What this advisory means

Multiple security weaknesses were found in the Linux kernel that an attacker might exploit to compromise your system. These issues affect many parts of the kernel, including hardware support and network features. Updating your system with the latest security patches will help protect you from these risks.

Technical explanation

How the issue affects the environment

The Linux kernel contains numerous vulnerabilities across various subsystems such as the x86 architecture, InfiniBand and network drivers, Thunderbolt and USB4 interfaces, as well as network traffic control components including IPv4 and IPv6 networking, Netfilter, RxRPC session sockets, and SCTP protocol handling. These flaws could be exploited to compromise system integrity or security. The updates address these vulnerabilities by correcting the faulty code in these components.

Operational impact

Why teams should care

If exploited, these kernel vulnerabilities could allow attackers to gain unauthorized access, disrupt network communications, or interfere with system operations, potentially leading to data breaches, service outages, or loss of customer trust. Organizations relying on affected Ubuntu systems should prioritize patching to reduce exposure to such risks.

Immediate action

To remediate these issues, update your Linux kernel packages to version 7.0.0-1010.10 or later provided by the vendor. After updating, reboot your system to apply the changes. Note that this update involves an ABI (Application Binary Interface) change that requires recompiling and reinstalling any third-party kernel modules you use.

Affected and fixed releases

Affected versionsConfirm in the official vendor advisory
Fixed versions7.0.0-1010.10

Temporary risk reduction

The advisory does not specify any workaround for these vulnerabilities. Deploying the updated kernel is the recommended action to mitigate the risks.

Evidence and validation checklist

  • Official Ubuntu Security Notice USN-8637-1 dated 2026-08-13
  • Listing of affected kernel subsystems including x86, network drivers, Thunderbolt/USB4 drivers, and protocols such as IPv4, IPv6, Netfilter, RxRPC, SCTP
  • Details on kernel update requiring kernel module recompilation
  • Reference to fixed kernel version 7.0.0-1010.10

Authoritative reference

Ubuntu Security Notices

QCS detected and normalized this record from the official source. Vendor guidance remains authoritative.

Open source