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Ubuntu 23.10 & 22.04 LTS USN-6651-2 Critical: Low Latency Kernel Threats

ubuntu
Calendar Grey February 28, 2024
Dist Ubuntu Esm H88
Several vulnerabilities addressed in the low latency kernel updates for Ubuntu. Urgent measures needed to safeguard against system failures and security breaches.
Several security issues were fixed in the Linux kernel.

Summary

Several security issues were fixed in the Linux kernel.

Software Description:

- linux-lowlatency: Linux low latency kernel

- linux-lowlatency-hwe-6.5: Linux low latency kernel

- linux-oem-6.5: Linux kernel for OEM systems

Details:

It was discovered that a race condition existed in the ATM (Asynchronous

Transfer Mode) subsystem of the Linux kernel, leading to a use-after-free

vulnerability. A local attacker could use this to cause a denial of service

(system crash) or possibly execute arbitrary code. (CVE-2023-51780)

It was discovered that a race condition existed in the AppleTalk networking

subsystem of the Linux kernel, leading to a use-after-free vulnerability. A

local attacker could use this to cause a denial of service (system crash)

or possibly execute arbitrary code. (CVE-2023-51781)

Zhenghan Wang discovered that the generic ID allocator implementation in

the Linux kernel did not properly check for null bitmap when releasing IDs.

A local attacker co...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service kernel update Ubuntu system crash low latency kernel

Update Instructions

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

Ubuntu 23.10:
   linux-image-6.5.0-21-lowlatency  6.5.0-21.21.1
   linux-image-6.5.0-21-lowlatency-64k  6.5.0-21.21.1
   linux-image-lowlatency          6.5.0.21.21.15
   linux-image-lowlatency-64k      6.5.0.21.21.15

Ubuntu 22.04 LTS:
   linux-image-6.5.0-1015-oem      6.5.0-1015.16
   linux-image-6.5.0-21-lowlatency  6.5.0-21.21.1~22.04.1
   linux-image-6.5.0-21-lowlatency-64k  6.5.0-21.21.1~22.04.1
   linux-image-lowlatency-64k-hwe-22.04  6.5.0.21.21.1~22.04.7
   linux-image-lowlatency-hwe-22.04  6.5.0.21.21.1~22.04.7
   linux-image-oem-22.04d          6.5.0.1015.17

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-6651-2

https://ubuntu.com/security/notices/USN-6651-1

CVE-2023-51780, CVE-2023-51781, CVE-2023-6915, CVE-2024-0565,

CVE-2024-0582, CVE-2024-0646

Severity
critical
Lowest
Low
Medium
High
Critical

Ubuntu Security Notice USN-6651-2

Topics%20covered

Topics Covered

security advisory denial of service kernel update Ubuntu system crash low latency kernel

Package Information

https://launchpad.net/ubuntu/+source/linux-lowlatency/6.5.0-21.21.1
https://launchpad.net/ubuntu/+source/linux-lowlatency-hwe-6.5/6.5.0-21.21.1~22.04.1
https://launchpad.net/ubuntu/+source/linux-oem-6.5/6.5.0-1015.16

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