CVE-2023-2430 Race condition in kernel

Medium 5.5 Published 23 Jul 2023 Updated 6 Mar 2025

A local attacker can cause a denial of service in the Linux kernel due to a missing lock in the io_uring subsystem.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Local or same network only
Victim action needed: Not needed
Fix: Available

What is CVE-2023-2430?

CVE-2023-2430 is a medium-severity vulnerability in Linux kernel, published on 23 Jul 2023. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

A vulnerability was found due to missing lock for IOPOLL flaw in io_cqring_event_overflow() in io_uring.c in Linux Kernel. This flaw allows a local attacker with user privilege to trigger a Denial of Service threat.

Weakness: CWE-667, CWE-413

Which versions are affected by CVE-2023-2430?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2023-2430?

Apply the vendor's patch.

Is CVE-2023-2430 being exploited?

There is no known exploitation of CVE-2023-2430 in the wild and no public exploit code.

All Linux kernel vulnerabilities

Sources

Also known as AZL-27759, DEBIAN-CVE-2023-2430, GHSA-3xvm-4g57-gvj6, UBUNTU-CVE-2023-2430.