[USN-6249-1] Linux kernel (OEM) vulnerabilities

Rodrigo Figueiredo Zaiden rodrigo.zaiden at canonical.com
Tue Jul 25 22:27:37 UTC 2023

Ubuntu Security Notice USN-6249-1
July 25, 2023

linux-oem-6.1 vulnerabilities

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 22.04 LTS


Several security issues were fixed in the Linux kernel.

Software Description:
- linux-oem-6.1: Linux kernel for OEM systems


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)

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

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.

   CVE-2023-3269, CVE-2023-3389

Package Information:

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