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==========================================================================
Ubuntu Security Notice USN-7496-3
May 07, 2025

linux-azure, linux-azure-4.15 vulnerabilities
==========================================================================

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

- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS

Summary:

Several security issues were fixed in the Linux kernel.

Software Description:
- linux-azure-4.15: Linux kernel for Microsoft Azure Cloud systems
- linux-azure: Linux kernel for Microsoft Azure Cloud systems

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-2023-52741, CVE-2024-56631, CVE-2024-50296, CVE-2024-50256,
CVE-2024-50237, CVE-2021-47219, CVE-2024-49944, CVE-2024-26915,
CVE-2024-56642, CVE-2023-52664, CVE-2024-36934, CVE-2023-52458,
CVE-2024-35864, CVE-2024-56598, CVE-2025-21971, CVE-2024-53063,
CVE-2023-52927, CVE-2024-46771, CVE-2024-49925, CVE-2024-53140,
CVE-2024-36015, CVE-2024-26689, CVE-2024-53173, CVE-2021-47191,
CVE-2024-56770, CVE-2024-56650, CVE-2021-47150, CVE-2021-47163,
CVE-2024-46780, CVE-2024-56651, CVE-2024-26996, CVE-2024-26974,
CVE-2024-53066)

Update instructions:

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

Ubuntu 18.04 LTS
  linux-image-4.15.0-1188-azure   4.15.0-1188.203
                                  Available with Ubuntu Pro
  linux-image-azure-lts-18.04     4.15.0.1188.156
                                  Available with Ubuntu Pro

Ubuntu 16.04 LTS
  linux-image-4.15.0-1188-azure   4.15.0-1188.203~16.04.1
                                  Available with Ubuntu Pro
  linux-image-azure               4.15.0.1188.203~16.04.1
                                  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-7496-3
  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


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