CVE-2025-21886 | Linux Kernel up to 6.12.17/6.13.5 mlx5 destroy_unused_implicit_child_mr reference count
A vulnerability, which was classified as critical, has been found in Linux Kernel up to 6.12.17/6.13.5. Affected by this issue is the function destroy_unused_implicit_child_mr of the component mlx5. The manipulation leads to improper update of reference count.
This vulnerability is handled as CVE-2025-21886. Access to the local network is required for this attack to succeed. There is no exploit available.
It is recommended to upgrade the affected component.