CVE-2026-93108 RDMA/ipoib: Drain RCU callbacks during module teardown
A race condition in the Linux kernel IPoIB driver during module teardown can cause a use-after-free, leading to system crashes or denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-93108?
CVE-2026-93108 is a vulnerability in Linux, published on 17 Sep 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/ipoib: Drain RCU callbacks during module teardown
IPoIB reclamation completions can be signaled from inside an RCU callback. Teardown can wake before the callback returns and unload ib_ipoib while its code is still executing.
Client registration failure can also remove already-added devices and queue callbacks. Wait after client and workqueue teardown.
Which versions are affected by CVE-2026-93108?
How do I fix CVE-2026-93108?
Apply the vendor's patch.
Is CVE-2026-93108 being exploited?
There is no known exploitation of CVE-2026-93108 in the wild and no public exploit code.
Sources
Also known as AZL-102147, BELL-CVE-2026-93108, DEBIAN-CVE-2026-93108, GHSA-v32w-6gxx-mfwq, UBUNTU-CVE-2026-93108.