[USN-7460-1] Linux kernel (Azure FIPS) vulnerabilities

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Ubuntu Security Notice USN-7460-1
April 24, 2025

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

- Ubuntu 22.04 LTS

Summary:

Several security issues were fixed in the Linux kernel.

Software Description:
- linux-azure-fips: Linux kernel for Microsoft Azure Cloud systems with FIPS

Details:

Jann Horn discovered that the watch_queue event notification subsystem in
the Linux kernel contained an out-of-bounds write vulnerability. A local
attacker could use this to cause a denial of service (system crash) or
escalate their privileges. (CVE-2022-0995)

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:
- Network drivers;
- Microsoft Azure Network Adapter (MANA) driver;
- File systems infrastructure;
- NTFS3 file system;
- Ethernet bridge;
- Ethtool driver;
- IPv6 networking;
- Network traffic control;
- VMware vSockets driver;
(CVE-2024-26837, CVE-2024-50248, CVE-2025-21756, CVE-2025-21701,
CVE-2024-50256, CVE-2025-21993, CVE-2025-21700, CVE-2025-21702,
CVE-2024-56651, CVE-2025-21703, CVE-2024-46826, CVE-2024-42069)

Update instructions:

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

Ubuntu 22.04 LTS
linux-image-5.15.0-1087-azure-fips 5.15.0-1087.96+fips1
Available with Ubuntu Pro
linux-image-azure-fips 5.15.0.1087.72
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-7460-1
CVE-2022-0995, CVE-2024-26837, CVE-2024-42069, CVE-2024-46826,
CVE-2024-50248, CVE-2024-50256, CVE-2024-56651, CVE-2025-21700,
CVE-2025-21701, CVE-2025-21702, CVE-2025-21703, CVE-2025-21756,
CVE-2025-21993