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Ubuntu 22.04 LTS USN-6122-1 Critical DoS Threat in Linux Kernel

ubuntu
Calendar Grey May 30, 2023
Dist Ubuntu Esm H88
Essential patch released for Ubuntu 22.04 LTS targeting linux-oem-6.1 security flaws and risk of service interruption.
Several security issues were fixed in the Linux kernel.

Summary

Several security issues were fixed in the Linux kernel.

Software Description:

- linux-oem-6.1: Linux kernel for OEM systems

Details:

Patryk Sondej and Piotr Krysiuk discovered that a race condition existed in

the netfilter subsystem of the Linux kernel when processing batch requests,

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-2023-32233)

Jean-Baptiste Cayrou discovered that the shiftfs file system in the Ubuntu

Linux kernel contained a race condition when handling inode locking in some

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

(kernel deadlock). (CVE-2023-2612)

Topics%20covered

Topics Covered

security advisory denial of service security issue kernel update ubuntu linux-oem-6.1

Update Instructions

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

Ubuntu 22.04 LTS:
   linux-image-6.1.0-1013-oem      6.1.0-1013.13
   linux-image-oem-22.04c          6.1.0.1013.13

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-6122-1

CVE-2023-2612, CVE-2023-32233

Severity
critical
Lowest
Low
Medium
High
Critical

May 30, 2023

Topics%20covered

Topics Covered

security advisory denial of service security issue kernel update ubuntu linux-oem-6.1

Package Information

https://launchpad.net/ubuntu/+source/linux-oem-6.1/6.1.0-1013.13

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