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Ubuntu 22.04 LTS USN-6248-1 Critical: Linux Kernel Resolutions

ubuntu
Calendar Grey July 25, 2023
Dist Ubuntu Esm H88
Fedora 37 improves system defenses against significant kernel flaws with patches aimed at boosting protection and performance.
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 null pointer dereference in some situations. A

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

(CVE-2022-47929)

It was discovered that a race condition existed in Adreno GPU DRM driver in

the Linux kernel, leading to a double-free vulnerability. A local attacker

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

(CVE-2023-21106)

Stonejiajia, Shir Tamari and Sagi Tzadik discovered that the OverlayFS

implementation in the Ubuntu Linux kernel did not properly perform

permission checks in certain situations. A local attacker could possibly

use this to gain elevated privileges. (CVE-2023-2640)

Mingi Cho discovered that the netfilter subsystem in the Linux kernel did

not properly validate the ...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service privilege escalation kernel ubuntu

Update Instructions

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

Ubuntu 22.04 LTS:
   linux-image-6.0.0-1020-oem      6.0.0-1020.20
   linux-image-oem-22.04b          6.0.0.1020.20

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-6248-1

CVE-2022-47929, CVE-2023-21106, CVE-2023-2640, CVE-2023-31248,

CVE-2023-32629, CVE-2023-3389, CVE-2023-35001

Severity
critical
Lowest
Low
Medium
High
Critical

Ubuntu Security Notice USN-6248-1

Topics%20covered

Topics Covered

security advisory denial of service privilege escalation kernel ubuntu

Package Information

https://launchpad.net/ubuntu/+source/linux-oem-6.0/6.0.0-1020.20

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