Explore top 10 tips to secure your open-source projects now. Read More

×
Alerts This Week
Warning Icon 1 506
Alerts This Week
Warning Icon 1 506

Ubuntu 20.04 LTS USN-5789-1 Critical: Multiple Kernel Issues Resolved

ubuntu
Calendar Grey January 5, 2023
Dist Ubuntu Esm H88
The latest patch for Ubuntu 20.04 LTS resolves various vulnerabilities within the Linux kernel, focusing on threats linked to remote exploitation and potential service interruptions.
Several security issues were fixed in the Linux kernel.

Summary

Several security issues were fixed in the Linux kernel.

Software Description:

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

Details:

It was discovered that the NFSD implementation in the Linux kernel did not

properly handle some RPC messages, leading to a buffer overflow. A remote

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

possibly execute arbitrary code. (CVE-2022-43945)

Jann Horn discovered that the Linux kernel did not properly track memory

allocations for anonymous VMA mappings in some situations, leading to

potential data structure reuse. A local attacker could use this to cause a

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

(CVE-2022-42703)

Roger Pau Monné discovered that the Xen virtual block driver in the Linux

kernel did not properly initialize memory pages to be used for shared

communication with the backend. A local attacker could use this to expose

sensitive information (guest kernel memory...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service buffer overflow remote exploit kernel fix memory leak ubuntu

Update Instructions

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

Ubuntu 20.04 LTS:
   linux-image-5.14.0-1055-oem     5.14.0-1055.62
   linux-image-oem-20.04           5.14.0.1055.53
   linux-image-oem-20.04b          5.14.0.1055.53
   linux-image-oem-20.04c          5.14.0.1055.53
   linux-image-oem-20.04d          5.14.0.1055.53

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-5789-1

CVE-2022-26365, CVE-2022-33743, CVE-2022-3524, CVE-2022-3564,

CVE-2022-3566, CVE-2022-3567, CVE-2022-3594, CVE-2022-3621,

CVE-2022-42703, CVE-2022-43945

Severity
critical
Lowest
Low
Medium
High
Critical

January 05, 2023

Topics%20covered

Topics Covered

security advisory denial of service buffer overflow remote exploit kernel fix memory leak ubuntu

Package Information

https://launchpad.net/ubuntu/+source/linux-oem-5.14/5.14.0-1055.62

Get the latest News and Insights

Get the latest Linux and open source security news straight to your inbox.