CVE-2026-53353

A flaw was found in the Linux kernel's High-availability Seamless Redundancy (HSR) module. An incorrect assumption in the hsr_addr_is_self() function regarding the self_node during device unregistration could lead to unexpected system behavior. This occurs because the self_node is cleared before the device is fully unregistered, creating a window where a user or process might interact with the device in an inconsistent state. This could potentially result in system instability or a denial of service (DoS).

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.