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Ubuntu 22.04 LTS USN-6249-1 Critical: Linux Kernel Use-After-Free Issues

ubuntu
Calendar Grey July 25, 2023
Dist Ubuntu Esm H88
Addressing Linux kernel vulnerabilities in Ubuntu 22.04 LTS is essential for maintaining security standards. Uncover the specifics.
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:

Ruihan Li discovered that the memory management subsystem in the Linux

kernel contained a race condition when accessing VMAs in certain

conditions, leading to a use-after-free vulnerability. A local attacker

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

execute arbitrary code. (CVE-2023-3269)

Querijn Voet discovered that a race condition existed in the io_uring

subsystem in the Linux kernel, leading to a use-after-free vulnerability. A

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

or possibly execute arbitrary code. (CVE-2023-3389)

Topics%20covered

Topics Covered

security advisory critical software update Ubuntu Denial of Service Linux kernel use-after-free

Update Instructions

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

Ubuntu 22.04 LTS:
   linux-image-6.1.0-1017-oem      6.1.0-1017.17
   linux-image-oem-22.04c          6.1.0.1017.17

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-6249-1

CVE-2023-3269, CVE-2023-3389

Severity
critical
Lowest
Low
Medium
High
Critical

Ubuntu Security Notice USN-6249-1

Topics%20covered

Topics Covered

security advisory critical software update Ubuntu Denial of Service Linux kernel use-after-free

Package Information

https://launchpad.net/ubuntu/+source/linux-oem-6.1/6.1.0-1017.17

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