CVE-2026-31492 RDMA/irdma: Initialize free_qp completion before using it
A missing initialization in the Linux kernel RDMA driver causes a null dereference and system crash when a specific error path is triggered.
- 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-2026-31492?
CVE-2026-31492 is a medium-severity vulnerability in Linux kernel, published on 22 Apr 2026. 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:
RDMA/irdma: Initialize free_qp completion before using it
In irdma_create_qp, if ib_copy_to_udata fails, it will call irdma_destroy_qp to clean up which will attempt to wait on the free_qp completion, which is not initialized yet. Fix this by initializing the completion before the ib_copy_to_udata call.
Weakness: CWE-908
Which versions are affected by CVE-2026-31492?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2026-31492?
Apply the vendor's patch.
Is CVE-2026-31492 being exploited?
There is no known exploitation of CVE-2026-31492 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2026-31492, DEBIAN-CVE-2026-31492, GHSA-w6p3-73r2-4574, ROOT-OS-DEBIAN-12-CVE-2026-31492, ROOT-OS-DEBIAN-13-CVE-2026-31492, ROOT-OS-UBUNTU-2204-CVE-2026-31492 and 2 more.