Strix
63.2K

CVE-2026-92506

Unknown

Last modified

CVE-2026-92506 is a vulnerability of currently unknown severity. 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.

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.

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= d3cd7c525fd2ecce3a6c963f314969a54783d211, < 2ff7713b7308cd6bea3328f7cd750b5eaab42af3; >= d3cd7c525fd2ecce3a6c963f314969a54783d211, < 1c35915eaaa81a12340c838c5c2ccb02be2194c3; >= d3cd7c525fd2ecce3a6c963f314969a54783d211, < c3d4ef1c0ca6917aad6f1093b49f3932944a8c19; >= d3cd7c525fd2ecce3a6c963f314969a54783d211, < 21d35c5f46e99e9047bb9ded3ecb5ab440dd75b3; >= d3cd7c525fd2ecce3a6c963f314969a54783d211, < 2c4097e6c4aed276c5e9ec2ab331ab397ea780bf
LinuxLinux6.3

References

Timeline

Published
Last Modified
Status
Received

Frequently Asked Questions

What is CVE-2026-92506?
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.
How severe is CVE-2026-92506?
Severity scoring for CVE-2026-92506 is pending analysis.
How do I fix CVE-2026-92506?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

How Strix Helps

Related CVEs from 2026

View all 2026CVEs →

Are you affected by CVE-2026-92506?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST