Name of the Vulnerable Software and Affected Versions Linux Kernel versions prior to v5.15.86

Description A potential security issue exists due to a node refcount leak in the tcpci register port() function. The actual impact and attack plausibility have not yet been proven. This issue was introduced in version v4.19 and is fixed in Linux Kernel version v5.15.86.

Recommendations For Linux Kernel versions prior to v5.15.86, update to version v5.15.86 or later to resolve the issue. As a temporary workaround, consider restricting access to the tcpci register port() function until a patch is available.