[USN-7496-2] Linux kernel (FIPS) vulnerabilities

==========================================================================
Ubuntu Security Notice USN-7496-2
May 07, 2025

linux-aws-fips, linux-fips, linux-gcp-fips vulnerabilities
==========================================================================

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

- Ubuntu 18.04 LTS

Summary:

Several security issues were fixed in the Linux kernel.

Software Description:
- linux-aws-fips: Linux kernel for Amazon Web Services (AWS) systems with FIPS
- linux-fips: Linux kernel with FIPS
- linux-gcp-fips: Linux kernel for Google Cloud Platform (GCP) systems with FIPS

Details:

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:
- Block layer subsystem;
- Character device driver;
- Hardware crypto device drivers;
- GPU drivers;
- Media drivers;
- Network drivers;
- SCSI subsystem;
- USB Gadget drivers;
- Framebuffer layer;
- Ceph distributed file system;
- File systems infrastructure;
- JFS file system;
- Network file system (NFS) client;
- NILFS2 file system;
- SMB network file system;
- Netfilter;
- CAN network layer;
- IPv6 networking;
- MAC80211 subsystem;
- Netlink;
- Network traffic control;
- SCTP protocol;
- TIPC protocol;
(CVE-2023-52664, CVE-2024-26974, CVE-2024-49944, CVE-2024-50256,
CVE-2024-35864, CVE-2025-21971, CVE-2023-52741, CVE-2024-50296,
CVE-2024-50237, CVE-2021-47191, CVE-2024-46771, CVE-2024-56770,
CVE-2021-47163, CVE-2024-53063, CVE-2024-53140, CVE-2024-36015,
CVE-2024-56650, CVE-2024-53173, CVE-2024-53066, CVE-2024-26689,
CVE-2024-56651, CVE-2024-36934, CVE-2024-56598, CVE-2021-47219,
CVE-2024-26915, CVE-2024-46780, CVE-2024-49925, CVE-2023-52458,
CVE-2021-47150, CVE-2024-56631, CVE-2024-26996, CVE-2023-52927,
CVE-2024-56642)

Update instructions:

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

Ubuntu 18.04 LTS
linux-image-4.15.0-1135-fips 4.15.0-1135.146
Available with Ubuntu Pro
linux-image-4.15.0-2081-gcp-fips 4.15.0-2081.87
Available with Ubuntu Pro
linux-image-4.15.0-2118-aws-fips 4.15.0-2118.124
Available with Ubuntu Pro
linux-image-aws-fips 4.15.0.2118.112
Available with Ubuntu Pro
linux-image-fips 4.15.0.1135.132
Available with Ubuntu Pro
linux-image-gcp-fips 4.15.0.2081.79
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-7496-2
https://ubuntu.com/security/notices/USN-7496-1
CVE-2021-47150, CVE-2021-47163, CVE-2021-47191, CVE-2021-47219,
CVE-2023-52458, CVE-2023-52664, CVE-2023-52741, CVE-2023-52927,
CVE-2024-26689, CVE-2024-26915, CVE-2024-26974, CVE-2024-26996,
CVE-2024-35864, CVE-2024-36015, CVE-2024-36934, CVE-2024-46771,
CVE-2024-46780, CVE-2024-49925, CVE-2024-49944, CVE-2024-50237,
CVE-2024-50256, CVE-2024-50296, CVE-2024-53063, CVE-2024-53066,
CVE-2024-53140, CVE-2024-53173, CVE-2024-56598, CVE-2024-56631,
CVE-2024-56642, CVE-2024-56650, CVE-2024-56651, CVE-2024-56770,
CVE-2025-21971

Package Information:
https://launchpad.net/ubuntu/+source/linux-aws-fips/4.15.0-2118.124
https://launchpad.net/ubuntu/+source/linux-fips/4.15.0-1135.146
https://launchpad.net/ubuntu/+source/linux-gcp-fips/4.15.0-2081.87