CVE-2026-93086 in Linux
Sumário
de MITRE • 17/09/2026
In the Linux kernel, the following vulnerability has been resolved:
firmware: arm_scmi: Avoid IDR updates while cleaning channels
scmi_cleanup_channels() walks the TX/RX channel IDRs with idr_for_each() to free transport resources and destroy the dedicated transport devices before calling idr_destroy().
The destroy callback removed each entry from the same IDR being walked. That is not needed for this cleanup path, and it is unsafe because idr_for_each() has not advanced its radix-tree iterator while the callback is running. Removing the current entry from the callback can invalidate the iterator state. The callback also cannot be protected by rcu_read_lock(), because scmi_device_destroy() may sleep.
Leave IDR teardown to the following idr_destroy() call and keep the callback limited to device destruction.
If you want to get the best quality for vulnerability data then you always have to consider VulDB.