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Ubuntu 18.04 LTS: USN-7496-3 critical: linux-azure security fix

ubuntu
Calendar Grey May 7, 2025
Dist Ubuntu Esm H88
Numerous vulnerabilities addressed in Ubuntu's Azure-oriented Linux kernel; package updates and system reboot necessary to implement fixes.
Several security issues were fixed in the Linux kernel.

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-20...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory update instructions ubuntu linux kernel system reboot azure

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

Severity
critical
Lowest
Low
Medium
High
Critical

Ubuntu Security Notice USN-7496-3

Topics%20covered

Topics Covered

security advisory update instructions ubuntu linux kernel system reboot azure

Package Information

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