CVE-2026-93092 firmware: arm_scmi: Unregister device notifier before IDR teardown
A race condition in the Linux kernel SCMI driver during device removal can lead to a system crash 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-2026-93092?
CVE-2026-93092 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:
firmware: arm_scmi: Unregister device notifier before IDR teardown
The requested-devices notifier looks up protocol fwnodes from the active_protocols IDR. During remove, unregister the notifier before releasing and destroying active_protocols so no notifier callback can race with the IDR teardown.
Keep the bus notifier registered until after the protocol state is torn down, matching the existing remove ordering for SCMI bus users.
Which versions are affected by CVE-2026-93092?
How do I fix CVE-2026-93092?
Apply the vendor's patch.
Is CVE-2026-93092 being exploited?
There is no known exploitation of CVE-2026-93092 in the wild and no public exploit code.
Sources
Also known as AZL-102527, BELL-CVE-2026-93092, DEBIAN-CVE-2026-93092, GHSA-8fvf-9m5c-mjwr, UBUNTU-CVE-2026-93092.