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[USN-8226-1] kmod update

Posted on 30 April 2026
Ubuntu Security

==========================================================================Ubuntu Security Notice USN-8226-1
April 30, 2026

kmod update
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 25.10
- Ubuntu 24.04 LTS
- Ubuntu 22.04 LTS

Summary:

kmod has been updated to block loading of the algif_aead kernel module.

Software Description:
- kmod: tools for managing Linux kernel modules

Details:

It was discovered that the Linux kernel algif_aead module contained a logic
flaw allowing a local attacker to escalate privileges to root. This update
to the kmod package disables loading the algif_aead module as a measure to
mitigate the issue until kernel updates are made available.

See the following URL for more information
https://ubuntu.com/blog/copy-fail-vulnerability-fixes-available

Update instructions:

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

Ubuntu 25.10
kmod 34.2-2ubuntu1.1

Ubuntu 24.04 LTS
kmod 31+20240202-2ubuntu7.2

Ubuntu 22.04 LTS
kmod 29-1ubuntu1.1

After a standard system update you need to reboot your computer to make
all the necessary changes.

References:
https://ubuntu.com/security/notices/USN-8226-1
CVE-2026-31431, https://launchpad.net/bugs/2150743

Package Information:
https://launchpad.net/ubuntu/+source/kmod/34.2-2ubuntu1.1
https://launchpad.net/ubuntu/+source/kmod/31+20240202-2ubuntu7.2
https://launchpad.net/ubuntu/+source/kmod/29-1ubuntu1.1

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