CVE-2022-21504 Use after free in Oracle Linux

Medium 5.5 Published 14 Jun 2022 Updated 24 Sep 2024

A local attacker can trigger a use-after-free in the UEK6 kernel, causing a denial of service by operating on a freed socket.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Local or same network only
Victim action needed: Not needed
Fix: None listed

What is CVE-2022-21504?

CVE-2022-21504 is a medium-severity use after free vulnerability in Oracle Linux, published on 14 Jun 2022. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

The code in UEK6 U3 was missing an appropiate file descriptor count to be missing. This resulted in a use count error that allowed a file descriptor to a socket to be closed and freed while it was still in use by another portion of the kernel. An attack with local access can operate on the socket, and cause a denial of service. CVSS 3.1 Base Score 5.5 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H).

Weakness: CWE-416

Which versions are affected by CVE-2022-21504?

It affects 1 product.

Products include Oracle Linux.

How do I fix CVE-2022-21504?

No fix has been published for CVE-2022-21504 yet. Limit exposure of the affected software until one is available.

Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.

Is CVE-2022-21504 being exploited?

There is no known exploitation of CVE-2022-21504 in the wild and no public exploit code.

All Oracle Linux vulnerabilities

Sources

Also known as GHSA-j35v-hq2g-vwqc.