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Ubuntu 22.04 LTS USN-6316-1 Critical: Linux Kernel OEM Flaws

ubuntu
Calendar Grey August 29, 2023
Dist Ubuntu Esm H88
Multiple security flaws identified within the Linux kernel package for Ubuntu affecting OEM platforms and possible attack vectors.
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:

Daniel Moghimi discovered that some Intel(R) Processors did not properly

clear microarchitectural state after speculative execution of various

instructions. A local unprivileged user could use this to obtain to

sensitive information. (CVE-2022-40982)

Tavis Ormandy discovered that some AMD processors did not properly handle

speculative execution of certain vector register instructions. A local

attacker could use this to expose sensitive information. (CVE-2023-20593)

Kevin Rich discovered that the netfilter subsystem in the Linux kernel did

not properly handle table rules flush in certain circumstances. A local

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

crash) or execute arbitrary code. (CVE-2023-3777)

Kevin Rich discovered that the netfilter subsystem in the Linux kernel did

not properly handle ru...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service critical information disclosure ubuntu linux kernel oem

Update Instructions

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

Ubuntu 22.04 LTS:
   linux-image-6.1.0-1020-oem      6.1.0-1020.20
   linux-image-oem-22.04c          6.1.0.1020.20

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-6316-1

CVE-2022-40982, CVE-2023-20593, CVE-2023-3777, CVE-2023-3995,

CVE-2023-4004, CVE-2023-4015

Severity
critical
Lowest
Low
Medium
High
Critical

Ubuntu Security Notice USN-6316-1

Topics%20covered

Topics Covered

security advisory denial of service critical information disclosure ubuntu linux kernel oem

Package Information

https://launchpad.net/ubuntu/+source/linux-oem-6.1/6.1.0-1020.20

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