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Ubuntu Security Notice USN-6874-1
July 04, 2024

linux-azure, linux-azure-6.5 vulnerabilities
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A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 23.10
- Ubuntu 22.04 LTS

Summary:

Several security issues were fixed in the Linux kernel.

Software Description:
- linux-azure: Linux kernel for Microsoft Azure Cloud systems
- linux-azure-6.5: Linux kernel for Microsoft Azure cloud systems

Details:

It was discovered that the Intel Data Streaming and Intel Analytics
Accelerator drivers in the Linux kernel allowed direct access to the
devices for unprivileged users and virtual machines. A local attacker could
use this to cause a denial of service. (CVE-2024-21823)

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:
   - Microsoft Azure Network Adapter (MANA) driver;
   - Netfilter;
(CVE-2024-26925, CVE-2024-26924, CVE-2024-26809, CVE-2024-26643,
CVE-2024-35901)

Update instructions:

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

Ubuntu 23.10
   linux-image-6.5.0-1023-azure    6.5.0-1023.24
   linux-image-6.5.0-1023-azure-fde  6.5.0-1023.24
   linux-image-azure               6.5.0.1023.27
   linux-image-azure-fde           6.5.0.1023.27

Ubuntu 22.04 LTS
   linux-image-6.5.0-1023-azure    6.5.0-1023.24~22.04.1
   linux-image-6.5.0-1023-azure-fde  6.5.0-1023.24~22.04.1
   linux-image-azure               6.5.0.1023.24~22.04.1
   linux-image-azure-fde           6.5.0.1023.24~22.04.1

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-6874-1
   CVE-2024-21823, CVE-2024-26643, CVE-2024-26809, CVE-2024-26924,
   CVE-2024-26925, CVE-2024-35901

Package Information:
   https://launchpad.net/ubuntu/+source/linux-azure/6.5.0-1023.24
   https://launchpad.net/ubuntu/+source/linux-azure-6.5/6.5.0-1023.24~22.04.1