CVE-2022-50742 misc: ocxl: fix possible refcount leak in afu_ioctl()
A refcount leak in the Linux kernel ocxl driver allows local attackers to cause a denial of service by exhausting resources.
- 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-2022-50742?
CVE-2022-50742 is a denial of service 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:
misc: ocxl: fix possible refcount leak in afu_ioctl()
eventfd_ctx_put need to be called to put the refcount that gotten by eventfd_ctx_fdget when ocxl_irq_set_handler fails.
Which versions are affected by CVE-2022-50742?
How do I fix CVE-2022-50742?
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-2022-50742 being exploited?
There is no known exploitation of CVE-2022-50742 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2022-50742, GHSA-7fvc-c9hj-7pgf, UBUNTU-CVE-2022-50742.