CVE-2025-40364 io_uring: fix io_req_prep_async with provided buffers
A bug in the Linux kernel's io_uring subsystem involving provided buffers was fixed, potentially affecting stability or correctness.
- 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-2025-40364?
CVE-2025-40364 is a high-severity vulnerability in Linux kernel, published on 18 Apr 2025. 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: fix io_req_prep_async with provided buffers
io_req_prep_async() can import provided buffers, commit the ring state by giving up on that before, it'll be reimported later if needed.
Which versions are affected by CVE-2025-40364?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2025-40364?
Apply the vendor's patch.
Is CVE-2025-40364 being exploited?
There is no known exploitation of CVE-2025-40364 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2025-40364, DEBIAN-CVE-2025-40364, GHSA-24g7-95rm-cqcc, ROOT-OS-UBUNTU-2404-CVE-2025-40364, UBUNTU-CVE-2025-40364.