CVE-2026-53260 | Linux Kernel up to 7.0.12 tcp lib/refcount.c _nested rsk_refcnt use after free

A vulnerability, which was classified as critical, was found in Linux Kernel up to 7.0.12. This vulnerability affects the function _nested in the library lib/refcount.c of the component tcp. Executing a manipulation of the argument rsk_refcnt can lead to use after free.

This vulnerability is handled as CVE-2026-53260. The attack can only be done within the local network. There is not any exploit available.

You should upgrade the affected component.