CVE-2026-46117 RDMA/mana: Remove user triggerable WARN_ON() in mana_ib_create_qp_rss()
A local attacker can trigger a kernel warning and potential corruption in the RDMA/mana driver by creating a Queue Pair with shared Completion Queues.
- 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-2026-46117?
CVE-2026-46117 is a high-severity denial of service vulnerability in Linux kernel, published on 28 May 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/mana: Remove user triggerable WARN_ON() in mana_ib_create_qp_rss()
Sashiko points out that the user can specify WQs sharing the same CQ as a part of the uAPI and this will trigger the WARN_ON() then go on to corrupt the kernel.
Just reject it outright and fail the QP creation.
Which versions are affected by CVE-2026-46117?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2026-46117?
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-2026-46117 being exploited?
There is no known exploitation of CVE-2026-46117 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2026-46117, DEBIAN-CVE-2026-46117, GHSA-c74j-26pg-r222, ROOT-OS-DEBIAN-13-CVE-2026-46117, ROOT-OS-UBUNTU-2404-CVE-2026-46117, UBUNTU-CVE-2026-46117.