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Ubuntu 22.04 LTS: USN-5977-1 Critical Denial of Service Risks

ubuntu
Calendar Grey March 27, 2023
Scroller Ubuntu
Ubuntu Security Notice USN-5980-1 tackles critical vulnerabilities in linux-oem-5.15, highlighting the importance of safeguarding system integrity and user data.
Several security issues were fixed in the Linux kernel.

Summary

Several security issues were fixed in the Linux kernel.

Software Description:

- linux-oem-6.0: Linux kernel for OEM systems

Details:

It was discovered that the network queuing discipline implementation in the

Linux kernel contained 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-2023-1281)

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)

Thadeu Cascardo discovered that the io_uring subsystem contained a double-free vulnerability in certain memory allocation error conditions. A local

attacker could possibly use this to cause a denial of service (system

crash). (CVE-2023-1032)

Topics%20covered

Topics Covered

security advisory denial of service kernel update information exposure ubuntu system crash use-after-free

Update Instructions

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

Ubuntu 22.04 LTS:
   linux-image-6.0.0-1013-oem      6.0.0-1013.13
   linux-image-oem-22.04b          6.0.0.1013.13

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-5977-1

CVE-2022-2196, CVE-2023-1032, CVE-2023-1281

Severity
critical
Lowest
Low
Medium
High
Critical

March 27, 2023

Topics%20covered

Topics Covered

security advisory denial of service kernel update information exposure ubuntu system crash use-after-free

Package Information

https://launchpad.net/ubuntu/+source/linux-oem-6.0/6.0.0-1013.13

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