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Ubuntu 22.04 LTS Kernel Important Escalation Flaws Fix USN-8305-1

ubuntu
Calendar Grey May 25, 2026
Dist Ubuntu Esm H88
Ubuntu Security Notice USN-8305-1 details several kernel fixes including privilege escalation risks.
Several security issues were fixed in the Linux kernel.

Summary

Several security issues were fixed in the Linux kernel.

Software Description:

- linux-intel-iot-realtime: Linux kernel for Intel IoT Real-time platforms

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)

Topics%20covered

Topics Covered

security advisory privilege escalation Ubuntu important kernel linux

Update Instructions

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

Ubuntu 22.04 LTS
   linux-image-5.15.0-1100-intel-iot-realtime  5.15.0-1100.102
                                   Available with Ubuntu Pro
   linux-image-intel-iot-realtime  5.15.0.1100.104
                                   Available with Ubuntu Pro
   linux-image-intel-iot-realtime-5.15  5.15.0.1100.104
                                   Available with Ubuntu Pro

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-8305-1

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

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

Severity
important
Lowest
Low
Medium
High
Critical

Ubuntu Security Notice USN-8305-1

Topics%20covered

Topics Covered

security advisory privilege escalation Ubuntu important kernel linux

Package Information

https://launchpad.net/ubuntu/+source/linux-intel-iot-realtime/5.15.0-1100.102

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