[USN-7848-1] AMD Microcode vulnerabilities

[noreply+usn-bot at canonical.com]

==========================================================================
Ubuntu Security Notice USN-7848-1
October 29, 2025

amd64-microcode vulnerabilities
==========================================================================

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

- Ubuntu 25.04

Summary:

Several security issues were fixed in AMD Microcode.

Software Description:
- amd64-microcode: Platform firmware and microcode for AMD CPUs and SoCs

Details:

Oleksii Oleksenko, Cedric Fournet, Jana Hofmann, Boris Köpf, Stavros Volos,
and Flavien Solt discovered that some AMD processors may allow an attacker
to infer data from previous stores. A local attacker could possibly use
this issue to expose sensitive information. This update provides the
updated microcode mitigations required for the corresponding Linux kernel
update.

Update instructions:

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

Ubuntu 25.04
  amd64-microcode                 3.20250708.0ubuntu0.25.04.2

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

References:
  https://ubuntu.com/security/notices/USN-7848-1
  CVE-2024-36350, CVE-2024-36357

Package Information:
  https://launchpad.net/ubuntu/+source/amd64-microcode/3.20250708.0ubuntu0.25.04.2
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 833 bytes
Desc: OpenPGP digital signature
URL: <https://lists.ubuntu.com/archives/ubuntu-security-announce/attachments/20251029/09527622/attachment.sig>