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Ubuntu 22.04 Low Latency Kernel Escalation Risk USN-8351-1

ubuntu
Calendar Grey June 1, 2026
Dist Ubuntu Esm H88
Several issues fixed in the Ubuntu low latency kernel, addressing potential escalation and system compromise risks.
Several security issues were fixed in the Linux kernel.

Summary

Several security issues were fixed in the Linux kernel.

Software Description:

- linux-lowlatency: Linux low latency kernel

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:

- Cryptographic API;

- Ethernet bonding driver;

- Packet sockets;

- TLS protocol;

(CVE-2026-31419, CVE-2026-31504, CVE-2026-31533, CVE-2026-43033,

CVE-2026-43077, CVE-2026-43078, CVE-2026-46028)

Topics%20covered

Topics Covered

security advisory update Ubuntu local escalation system compromise low latency kernel

Update Instructions

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 22.04 LTS
   linux-image-5.15.0-179-lowlatency  5.15.0-179.189
   linux-image-5.15.0-179-lowlatency-64k  5.15.0-179.189
   linux-image-lowlatency          5.15.0.179.151
   linux-image-lowlatency-5.15     5.15.0.179.151
   linux-image-lowlatency-64k      5.15.0.179.151
   linux-image-lowlatency-64k-5.15  5.15.0.179.151
   linux-image-lowlatency-64k-hwe-20.04  5.15.0.179.151
   linux-image-lowlatency-hwe-20.04  5.15.0.179.151

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-8351-1

CVE-2026-31419, CVE-2026-31431, CVE-2026-31504, CVE-2026-31533,

CVE-2026-43033, CVE-2026-43077, CVE-2026-43078, CVE-2026-46028

Severity
low
Lowest
Low
Medium
High
Critical

Ubuntu Security Notice USN-8351-1

Topics%20covered

Topics Covered

security advisory update Ubuntu local escalation system compromise low latency kernel

Package Information

https://launchpad.net/ubuntu/+source/linux-lowlatency/5.15.0-179.189

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