CVE-2023-52654 io_uring/af_unix: disable sending io_uring over sockets
A race condition in the Linux kernel's io_uring subsystem involving Unix sockets could lead to file reference cycles and potential denial of service.
- 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-2023-52654?
CVE-2023-52654 is a high-severity vulnerability in Linux kernel, published on 9 May 2024. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
io_uring/af_unix: disable sending io_uring over sockets
File reference cycles have caused lots of problems for io_uring in the past, and it still doesn't work exactly right and races with unix_stream_read_generic(). The safest fix would be to completely disallow sending io_uring files via sockets via SCM_RIGHT, so there are no possible cycles invloving registered files and thus rendering SCM accounting on the io_uring side unnecessary.
Which versions are affected by CVE-2023-52654?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2023-52654?
Apply the vendor's patch.
Is CVE-2023-52654 being exploited?
There is no known exploitation of CVE-2023-52654 in the wild and no public exploit code.
Public exploit code: 1 proofs of concept on GitHub.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2023-52654, DEBIAN-CVE-2023-52654, GHSA-p435-prrh-xm57, UBUNTU-CVE-2023-52654.