CVE-2025-38112

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> net: Fix TOCTOU issue in sk_is_readable()<br /> <br /> sk-&gt;sk_prot-&gt;sock_is_readable is a valid function pointer when sk resides<br /> in a sockmap. After the last sk_psock_put() (which usually happens when<br /> socket is removed from sockmap), sk-&gt;sk_prot gets restored and<br /> sk-&gt;sk_prot-&gt;sock_is_readable becomes NULL.<br /> <br /> This makes sk_is_readable() racy, if the value of sk-&gt;sk_prot is reloaded<br /> after the initial check. Which in turn may lead to a null pointer<br /> dereference.<br /> <br /> Ensure the function pointer does not turn NULL after the check.