CVE-2025-39764

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> netfilter: ctnetlink: remove refcounting in expectation dumpers<br /> <br /> Same pattern as previous patch: do not keep the expectation object<br /> alive via refcount, only store a cookie value and then use that<br /> as the skip hint for dump resumption.<br /> <br /> AFAICS this has the same issue as the one resolved in the conntrack<br /> dumper, when we do<br /> if (!refcount_inc_not_zero(&amp;exp-&gt;use))<br /> <br /> to increment the refcount, there is a chance that exp == last, which<br /> causes a double-increment of the refcount and subsequent memory leak.