CVE-2026-53256

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description A slab-use-after-free issue exists in the Bluetooth RFCOMM implementation. The function rfcomm get sock by channel() scans the rfcomm sk list under a list lock but returns the selected listener without taking a reference after dropping that lock. This creates a race condition where a listener can be freed via rfcomm sock release(), rfcomm sock shutdown(), and rfcomm sock kill() before rfcomm connect ind() can call lock sock(), bt accept enqueue(), or the deferred-setup callback.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.