CVE-2023-54088 blk-cgroup: hold queue_lock when removing blkg->q_node
A race condition in the Linux kernel block cgroup subsystem can cause list corruption and system lockups, leading to 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-2023-54088?
CVE-2023-54088 is a high-severity vulnerability in Linux, published on 24 Dec 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:
blk-cgroup: hold queue_lock when removing blkg->q_node
When blkg is removed from q->blkg_list from blkg_free_workfn(), queue_lock has to be held, otherwise, all kinds of bugs(list corruption, hard lockup, ..) can be triggered from blkg_destroy_all().
Which versions are affected by CVE-2023-54088?
How do I fix CVE-2023-54088?
Apply the vendor's patch.
Is CVE-2023-54088 being exploited?
There is no known exploitation of CVE-2023-54088 in the wild and no public exploit code.
Sources
Also known as BELL-CVE-2023-54088, DEBIAN-CVE-2023-54088, GHSA-vfv6-vxgw-2mv8, ROOT-OS-DEBIAN-12-CVE-2023-54088, ROOT-OS-UBUNTU-2204-CVE-2023-54088, UBUNTU-CVE-2023-54088.