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[USN-7758-4] Linux kernel (Oracle) vulnerability

Posted on 19 September 2025
Ubuntu Security

==========================================================================Ubuntu Security Notice USN-7758-4
September 19, 2025

linux-oracle-6.8 vulnerability
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 22.04 LTS

Summary:

The system could be made to crash or run programs as an administrator.

Software Description:
- linux-oracle-6.8: Linux kernel for Oracle Cloud systems

Details:

It was discovered that the AF_UNIX socket garbage collection implementation
in Ubuntu Noble's 6.8 kernel did not properly handle out-of-band (OOB)
messages, leading to a use-after-free vulnerability. An attacker could use
this to cause a denial of service (system crash) or possibly execute
arbitrary code.

Update instructions:

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

Ubuntu 22.04 LTS
linux-image-6.8.0-1035-oracle 6.8.0-1035.36~22.04.1
linux-image-6.8.0-1035-oracle-64k 6.8.0-1035.36~22.04.1
linux-image-oracle 6.8.0-1035.36~22.04.1
linux-image-oracle-6.8 6.8.0-1035.36~22.04.1
linux-image-oracle-64k 6.8.0-1035.36~22.04.1
linux-image-oracle-64k-6.8 6.8.0-1035.36~22.04.1

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-7758-4
https://ubuntu.com/security/notices/USN-7758-3
https://ubuntu.com/security/notices/USN-7758-2
https://ubuntu.com/security/notices/USN-7758-1
https://launchpad.net/bugs/2121515

Package Information:
https://launchpad.net/ubuntu/+source/linux-oracle-6.8/6.8.0-1035.36~22.04.1


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