1. Ubuntu Security Notices
  2. USN-8277-1

USN-8277-1: Linux kernel vulnerabilities

Publication date

19 May 2026

Overview

Several security issues were fixed in the Linux kernel.

Releases

Packages

Details

It was discovered that the Linux kernel algif_aead module did not properly
handle in-place cryptographic operations. This flaw is known as Copy Fail.
A local attacker could use this to escalate privileges, or possibly escape
a container. (CVE-2026-31431)

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:

  • S390 architecture;
  • Cryptographic API;
  • GPU drivers;
  • Ethernet bonding driver;
  • Network file system (NFS) server daemon;
  • Distributed Switch Architecture;
  • Netfilter;
  • Control group (cgroup);
  • Kernel kexec() syscall;
  • Memory management;
  • MAC80211 subsystem;
  • Multipath TCP;
  • Packet sockets;
  • TLS protocol;
  • Unix domain sockets

It was discovered that the Linux kernel algif_aead module did not properly
handle in-place cryptographic operations. This flaw is known as Copy Fail.
A local attacker could use this to escalate privileges, or possibly escape
a container. (CVE-2026-31431)

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:

  • S390 architecture;
  • Cryptographic API;
  • GPU drivers;
  • Ethernet bonding driver;
  • Network file system (NFS) server daemon;
  • Distributed Switch Architecture;
  • Netfilter;
  • Control group (cgroup);
  • Kernel kexec() syscall;
  • Memory management;
  • MAC80211 subsystem;
  • Multipath TCP;
  • Packet sockets;
  • TLS protocol;
  • Unix domain 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
25.10 questing linux-image-6.17.0-1013-realtime –  6.17.0-1013.15
linux-image-6.17.0-1014-oracle –  6.17.0-1014.14
linux-image-6.17.0-1014-oracle-64k –  6.17.0-1014.14
linux-image-6.17.0-1015-aws –  6.17.0-1015.15
linux-image-6.17.0-1015-aws-64k –  6.17.0-1015.15
linux-image-6.17.0-1017-raspi –  6.17.0-1017.17
linux-image-6.17.0-29-generic –  6.17.0-29.29
linux-image-6.17.0-29-generic-64k –  6.17.0-29.29
linux-image-aws –  6.17.0-1015.15
linux-image-aws-6.17 –  6.17.0-1015.15
linux-image-aws-64k –  6.17.0-1015.15
linux-image-aws-64k-6.17 –  6.17.0-1015.15
linux-image-generic –  6.17.0-29.29
linux-image-generic-6.17 –  6.17.0-29.29
linux-image-generic-64k –  6.17.0-29.29
linux-image-generic-64k-6.17 –  6.17.0-29.29
linux-image-oracle –  6.17.0-1014.14
linux-image-oracle-6.17 –  6.17.0-1014.14
linux-image-oracle-64k –  6.17.0-1014.14
linux-image-oracle-64k-6.17 –  6.17.0-1014.14
linux-image-raspi –  6.17.0-1017.17
linux-image-raspi-6.17 –  6.17.0-1017.17
linux-image-realtime –  6.17.0-1013.15
linux-image-realtime-6.17 –  6.17.0-1013.15
linux-image-realtime-hwe-24.04 –  6.17.0-1013.15
linux-image-realtime-hwe-24.04-edge –  6.17.0-1013.15
linux-image-virtual –  6.17.0-29.29
linux-image-virtual-6.17 –  6.17.0-29.29
24.04 LTS noble linux-image-6.17.0-1013-realtime –  6.17.0-1013.15~24.04.1  
linux-image-6.17.0-1023-oem –  6.17.0-1023.23
linux-image-6.17.0-29-generic –  6.17.0-29.29~24.04.1
linux-image-6.17.0-29-generic-64k –  6.17.0-29.29~24.04.1
linux-image-generic-6.17 –  6.17.0-29.29~24.04.1
linux-image-generic-64k-6.17 –  6.17.0-29.29~24.04.1
linux-image-generic-64k-hwe-24.04 –  6.17.0-29.29~24.04.1
linux-image-generic-hwe-24.04 –  6.17.0-29.29~24.04.1
linux-image-oem-24.04 –  6.17.0-1023.23
linux-image-oem-24.04a –  6.17.0-1023.23
linux-image-oem-24.04b –  6.17.0-1023.23
linux-image-oem-24.04c –  6.17.0-1023.23
linux-image-oem-24.04d –  6.17.0-1023.23
linux-image-oem-6.17 –  6.17.0-1023.23
linux-image-realtime-6.17 –  6.17.0-1013.15~24.04.1  
linux-image-realtime-hwe-24.04 –  6.17.0-1013.15~24.04.1  
linux-image-virtual-6.17 –  6.17.0-29.29~24.04.1
linux-image-virtual-hwe-24.04 –  6.17.0-29.29~24.04.1

Reduce your security exposure

Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

Get Ubuntu Pro

References

Have additional questions?

Talk to a member of the team ›