CVE-2023-53207 ublk: fail to recover device if queue setup is interrupted
An attacker can trigger a kernel oops and denial of service by interrupting the ublk device recovery process before queue setup completes.
- 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-2023-53207?
CVE-2023-53207 is a medium-severity vulnerability in Linux kernel, published on 15 Sep 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:
ublk: fail to recover device if queue setup is interrupted
In ublk_ctrl_end_recovery(), if wait_for_completion_interruptible() is interrupted by signal, queues aren't setup successfully yet, so we have to fail UBLK_CMD_END_USER_RECOVERY, otherwise kernel oops can be triggered.
Which versions are affected by CVE-2023-53207?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2023-53207?
Apply the vendor's patch.
Is CVE-2023-53207 being exploited?
There is no known exploitation of CVE-2023-53207 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2023-53207, DEBIAN-CVE-2023-53207, GHSA-5wgx-32wg-vj8f, UBUNTU-CVE-2023-53207.