CVE-2025-68357 iomap: allocate s_dio_done_wq for async reads as well
A missing workqueue allocation for async reads in the Linux kernel iomap subsystem can lead to a null pointer dereference and system crash.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2025-68357?
CVE-2025-68357 is a 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:
iomap: allocate s_dio_done_wq for async reads as well
Since commit 222f2c7c6d14 ("iomap: always run error completions in user context"), read error completions are deferred to s_dio_done_wq. This means the workqueue also needs to be allocated for async reads.
Which versions are affected by CVE-2025-68357?
How do I fix CVE-2025-68357?
Apply the vendor's patch.
Is CVE-2025-68357 being exploited?
There is no known exploitation of CVE-2025-68357 in the wild and no public exploit code.
Sources
Also known as AZL-73078, BELL-CVE-2025-68357, DEBIAN-CVE-2025-68357, GHSA-6998-95jp-6xx2, ROOT-OS-DEBIAN-13-CVE-2025-68357, UBUNTU-CVE-2025-68357.