CVE-2025-22076 exfat: fix missing shutdown check
Missing shutdown checks in the Linux kernel exFAT driver allow reading dirty data after device deletion, potentially causing system instability or 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-2025-22076?
CVE-2025-22076 is a medium-severity denial of service vulnerability in Linux kernel, published on 16 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:
exfat: fix missing shutdown check
xfstests generic/730 test failed because after deleting the device that still had dirty data, the file could still be read without returning an error. The reason is the missing shutdown check in ->read_iter.
I also noticed that shutdown checks were missing from ->write_iter, ->splice_read, and ->mmap. This commit adds shutdown checks to all of them.
Which versions are affected by CVE-2025-22076?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2025-22076?
Apply the vendor's patch.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2025-22076 being exploited?
There is no known exploitation of CVE-2025-22076 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2025-22076, DEBIAN-CVE-2025-22076, GHSA-6c74-8p8j-4qv8, UBUNTU-CVE-2025-22076.