CVE-2026-68417 RDMA/siw: publish QP after initialization
A race condition in the Linux kernel RDMA subsystem allows access to uninitialized Queue Pairs, potentially leading to code execution 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-2026-68417?
CVE-2026-68417 is a high-severity vulnerability in Linux, published on 10 Aug 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/siw: publish QP after initialization
siw_create_qp() currently calls siw_qp_add() before the queues, CQ pointers, state, completion, and device list entry are ready. A QPN lookup can therefore reach a QP that is still being constructed.
Move siw_qp_add() to the end of siw_create_qp(), after QP initialization and before adding the QP to the siw device list.
Weakness: CWE-362
Which versions are affected by CVE-2026-68417?
How do I fix CVE-2026-68417?
Apply the vendor's patch.
Is CVE-2026-68417 being exploited?
There is no known exploitation of CVE-2026-68417 in the wild and no public exploit code.
Sources
Also known as BELL-CVE-2026-68417, DEBIAN-CVE-2026-68417, GHSA-f5gm-g4v9-mv95, UBUNTU-CVE-2026-68417.