Ubuntu 22.04 LTS: USN-5565-1 Critical: Kernel DoS Issues Fixed

ubuntu

August 10, 2022

Several security issues were fixed in the Linux kernel.

Summary

Several security issues were fixed in the Linux kernel.

Software Description:

- linux: Linux kernel

- linux-lowlatency: Linux low latency kernel

- linux-hwe-5.15: Linux hardware enablement (HWE) kernel

- linux-lowlatency-hwe-5.15: Linux low latency kernel

Details:

Zhenpeng Lin discovered that the network packet scheduler implementation in

the Linux kernel did not properly remove all references to a route filter

before freeing it in some situations. A local attacker could use this to

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

(CVE-2022-2588)

It was discovered that the netfilter subsystem of the Linux kernel did not

prevent one nft object from referencing an nft set in another nft table,

leading to a use-after-free vulnerability. A local attacker could use this

to cause a denial of service (system crash) or execute arbitrary code.

(CVE-2022-2586)

It was discovered that the implementation of POSIX timers in the Linux

kernel did not...

Read the Full Advisory

Topics Covered

security advisory denial of service software patch Ubuntu system update kernel issue

Update Instructions

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

Ubuntu 22.04 LTS:
   linux-image-5.15.0-46-generic   5.15.0-46.49
   linux-image-5.15.0-46-generic-64k  5.15.0-46.49
   linux-image-5.15.0-46-generic-lpae  5.15.0-46.49
   linux-image-5.15.0-46-lowlatency  5.15.0-46.49
   linux-image-5.15.0-46-lowlatency-64k  5.15.0-46.49
   linux-image-generic             5.15.0.46.46
   linux-image-generic-64k         5.15.0.46.46
   linux-image-generic-64k-hwe-22.04  5.15.0.46.46
   linux-image-generic-hwe-22.04   5.15.0.46.46
   linux-image-generic-lpae        5.15.0.46.46
   linux-image-generic-lpae-hwe-22.04  5.15.0.46.46
   linux-image-lowlatency          5.15.0.46.43
   linux-image-lowlatency-64k      5.15.0.46.43
   linux-image-lowlatency-64k-hwe-22.04  5.15.0.46.43
   linux-image-lowlatency-hwe-22.04  5.15.0.46.43
   linux-image-virtual             5.15.0.46.46
   linux-image-virtual-hwe-22.04   5.15.0.46.46

Ubuntu 20.04 LTS:
   linux-image-5.15.0-46-generic   5.15.0-46.49~20.04.1
   linux-image-5.15.0-46-generic-64k  5.15.0-46.49~20.04.1
   linux-image-5.15.0-46-generic-lpae  5.15.0-46.49~20.04.1
   linux-image-5.15.0-46-lowlatency  5.15.0-46.49~20.04.1
   linux-image-5.15.0-46-lowlatency-64k  5.15.0-46.49~20.04.1
   linux-image-generic-64k-hwe-20.04  5.15.0.46.49~20.04.16
   linux-image-generic-hwe-20.04   5.15.0.46.49~20.04.16
   linux-image-generic-lpae-hwe-20.04  5.15.0.46.49~20.04.16
   linux-image-lowlatency-64k-hwe-20.04  5.15.0.46.49~20.04.15
   linux-image-lowlatency-hwe-20.04  5.15.0.46.49~20.04.15
   linux-image-virtual-hwe-20.04   5.15.0.46.49~20.04.16

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.