CVE-2025-21886 | Linux Kernel up to 6.12.17/6.13.5 mlx5 destroy_unused_implicit_child_mr reference count (WID-SEC-2025-0649)
A vulnerability was found in Linux Kernel up to 6.12.17/6.13.5. It has been classified as critical. Affected is the function destroy_unused_implicit_child_mr of the component mlx5. This manipulation causes improper update of reference count.
This vulnerability appears as CVE-2025-21886. The attacker needs to be present on the local network. There is no available exploit.
Upgrading the affected component is recommended.