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Ubuntu 20.04 LTS: USN-7234-3 critical: linux-azure double-free issue

ubuntu
Calendar Grey February 4, 2025
Dist Ubuntu Esm H88
Several vulnerabilities addressed in the Ubuntu kernel, enhancing defenses against denial-of-service attacks and execution threats.
Several security issues were fixed in the Linux kernel.

Summary

Several security issues were fixed in the Linux kernel.

Software Description:

- linux-azure: Linux kernel for Microsoft Azure Cloud systems

- linux-azure-5.4: Linux kernel for Microsoft Azure cloud systems

Details:

Ye Zhang and Nicolas Wu discovered that the io_uring subsystem in the Linux

kernel did not properly handle locking for rings with IOPOLL, leading to a

double-free vulnerability. A local attacker could use this to cause a

denial of service (system crash) or possibly execute arbitrary code.

(CVE-2023-21400)

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:

- TTY drivers;

- Netfilter;

- Network traffic control;

- VMware vSockets driver;

(CVE-2024-53141, CVE-2024-53103, CVE-2024-40967, CVE-2024-53164)

Topics%20covered

Topics Covered

security advisory denial of service kernel update ubuntu system crash linux kernel double-free issue

Update Instructions

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

Ubuntu 20.04 LTS
   linux-image-5.4.0-1143-azure    5.4.0-1143.150
   linux-image-azure-lts-20.04     5.4.0.1143.137

Ubuntu 18.04 LTS
   linux-image-5.4.0-1143-azure    5.4.0-1143.150~18.04.1
                                   Available with Ubuntu Pro
   linux-image-azure               5.4.0.1143.150~18.04.1
                                   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-7234-3

https://ubuntu.com/security/notices/USN-7234-2

https://ubuntu.com/security/notices/USN-7234-1

CVE-2023-21400, CVE-2024-40967, CVE-2024-53103, CVE-2024-53141,

CVE-2024-53164

Severity
critical
Lowest
Low
Medium
High
Critical

Ubuntu Security Notice USN-7234-3

Topics%20covered

Topics Covered

security advisory denial of service kernel update ubuntu system crash linux kernel double-free issue

Package Information

https://launchpad.net/ubuntu/+source/linux-azure/5.4.0-1143.150

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