1. Ubuntu Security Notices
  2. USN-8631-2

USN-8631-2: Linux kernel (Oracle) vulnerabilities

Publication date

13 August 2026

Overview

Several security issues were fixed in the Linux kernel.

Releases

Packages

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...

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

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-5.15.0-1110-oracle –  5.15.0-1110.116
linux-image-oracle-5.15 –  5.15.0.1110.106
linux-image-oracle-lts-22.04 –  5.15.0.1110.106

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References

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