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Ubuntu 22.04 LTS, 20.04 LTS USN-5976-1 Critical: Kernel DoS Fixes

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Calendar Grey March 27, 2023
Scroller Ubuntu
Numerous vulnerabilities addressed within the Linux core impacting Ubuntu versions 20.04 and 22.04. Prompt updates are essential.
Several security issues were fixed in the Linux kernel.

Summary

Several security issues were fixed in the Linux kernel.

Software Description:

- linux-oem-5.17: Linux kernel for OEM systems

- linux-oem-5.14: Linux kernel for OEM systems

Details:

It was discovered that the Upper Level Protocol (ULP) subsystem in the

Linux kernel did not properly handle sockets entering the LISTEN state in

certain protocols, 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-2023-0461)

It was discovered that the KVM VMX implementation in the Linux kernel did

not properly handle indirect branch prediction isolation between L1 and L2

VMs. An attacker in a guest VM could use this to expose sensitive

information from the host OS or other guest VMs. (CVE-2022-2196)

It was discovered that the Intel 740 frame buffer driver in the Linux

kernel contained a divide by zero vulnerability. A local attacker could use

this to cause a denial of s...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory DoS kernel system update ubuntu critical equipment

Update Instructions

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

Ubuntu 22.04 LTS:
   linux-image-5.17.0-1029-oem     5.17.0-1029.30
   linux-image-oem-22.04           5.17.0.1029.27
   linux-image-oem-22.04a          5.17.0.1029.27

Ubuntu 20.04 LTS:
   linux-image-5.14.0-1059-oem     5.14.0-1059.67
   linux-image-oem-20.04           5.14.0.1059.57
   linux-image-oem-20.04b          5.14.0.1059.57
   linux-image-oem-20.04c          5.14.0.1059.57
   linux-image-oem-20.04d          5.14.0.1059.57

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-5976-1

CVE-2022-2196, CVE-2022-3061, CVE-2022-3628, CVE-2022-36280,

CVE-2022-3646, CVE-2022-3649, CVE-2022-41850, CVE-2023-0394,

CVE-2023-0461

Severity
critical
Lowest
Low
Medium
High
Critical

March 27, 2023

Topics%20covered

Topics Covered

security advisory DoS kernel system update ubuntu critical equipment

Package Information

https://launchpad.net/ubuntu/+source/linux-oem-5.17/5.17.0-1029.30
https://launchpad.net/ubuntu/+source/linux-oem-5.14/5.14.0-1059.67

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