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Ubuntu 22.04 LTS USN-6033-1 Moderate: Linux Kernel Security Flaws

ubuntu
Calendar Grey April 19, 2023
Dist Ubuntu Esm H88
Multiple security flaws in Ubuntu 22.04 LTS Linux kernel necessitate urgent updates. Safeguard your system immediately.
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:

It was discovered that the Traffic-Control Index (TCINDEX) implementation

in the Linux kernel did not properly perform filter deactivation in some

situations. A local attacker could possibly use this to gain elevated

privileges. Please note that with the fix for this CVE, kernel support for

the TCINDEX classifier has been removed. (CVE-2023-1829)

William Zhao discovered that the Traffic Control (TC) subsystem in the

Linux kernel did not properly handle network packet retransmission in

certain situations. A local attacker could use this to cause a denial of

service (kernel deadlock). (CVE-2022-4269)

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-...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service Ubuntu kernel local attack use-after-free linux-oem-6.1

Update Instructions

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

Ubuntu 22.04 LTS:
   linux-image-6.1.0-1009-oem      6.1.0-1009.9
   linux-image-oem-22.04c          6.1.0.1009.9

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-6033-1

CVE-2022-4269, CVE-2023-1032, CVE-2023-1076, CVE-2023-1077,

CVE-2023-1079, CVE-2023-1118, CVE-2023-1583, CVE-2023-1670,

CVE-2023-1829, CVE-2023-1855, CVE-2023-1989, CVE-2023-1990,

CVE-2023-1998, CVE-2023-25012, CVE-2023-28466, CVE-2023-28866,

CVE-2023-30456

Severity
important
Lowest
Low
Medium
High
Critical

April 19, 2023

Topics%20covered

Topics Covered

security advisory denial of service Ubuntu kernel local attack use-after-free linux-oem-6.1

Package Information

https://launchpad.net/ubuntu/+source/linux-oem-6.1/6.1.0-1009.9

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