CVE-2026-92506
Description
In the Linux kernel, the following vulnerability has been resolved: firmware: arm_scmi: Fix requested device removal race scmi_protocol_device_unrequest() drops scmi_requested_devices_mtx while notifying listeners but continues to retain the per-protocol list head. When two SCMI drivers for the same protocol unregister concurrently, one thread can remove the final request and free the list head while the other is running its notifier. The latter then dereferences the freed list head after reacquiring the mutex and can free it a second time. Complete the list and IDR updates, including freeing an empty list head, before dropping the mutex. Keep the blocking notifier outside the critical section and retain only the detached request across the callback.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
Propose a mitigation on Community Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
References
- https://git.kernel.org/stable/c/1c35915eaaa81a12340c838c5c2ccb02be2194c3
- https://git.kernel.org/stable/c/21d35c5f46e99e9047bb9ded3ecb5ab440dd75b3
- https://git.kernel.org/stable/c/2c4097e6c4aed276c5e9ec2ab331ab397ea780bf
- https://git.kernel.org/stable/c/2ff7713b7308cd6bea3328f7cd750b5eaab42af3
- https://git.kernel.org/stable/c/c3d4ef1c0ca6917aad6f1093b49f3932944a8c19
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.