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Ubuntu 22.04 LTS USN-6072-1 Critical: Multiple Kernel Threats

ubuntu
Calendar Grey May 10, 2023
Dist Ubuntu Esm H88
Ubuntu 22.04 LTS has released security updates targeting several critical kernel vulnerabilities. Detailed information and comprehensive installation guidelines are provided.
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 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)

Lin Ma discovered a race condition in the io_uring subsystem in the Linux

kernel, leading to a null pointer dereference vulnerability. A local

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

(CVE-2023-0468)

It was discovered that the OverlayFS implementation in the Linux kernel did

not properly handle copy up operation in some conditions. A local attacker

could possibly use this to gain elevated privileges. (CVE-2023-0386)

It was discovered that a race conditi...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service critical Ubuntu kernel local attack elevation of privilege

Update Instructions

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

Ubuntu 22.04 LTS:
   linux-image-6.0.0-1015-oem      6.0.0-1015.15
   linux-image-oem-22.04b          6.0.0.1015.15

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-6072-1

CVE-2023-0386, CVE-2023-0468, CVE-2023-1829, CVE-2023-1859,

CVE-2023-23455, CVE-2023-26545

Severity
critical
Lowest
Low
Medium
High
Critical

May 10, 2023

Topics%20covered

Topics Covered

security advisory denial of service critical Ubuntu kernel local attack elevation of privilege

Package Information

https://launchpad.net/ubuntu/+source/linux-oem-6.0/6.0.0-1015.15

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