https://cve.radiocsirt.org Contains only the most 10 recent entries. http://www.rssboard.org/rss-specification python-feedgen en Thu, 08 Oct 2026 00:32:56 +0000 https://cve.radiocsirt.org/vuln/cve-2025-37890 <p><strong>Affected:</strong> Linux</p> <p>In the Linux kernel, the following vulnerability has been resolved:</p> <p>net_sched: hfsc: Fix a UAF vulnerability in class with netem as child qdisc</p> <p>As described in Gerrard&#39;s report [1], we have a UAF case when an hfsc class has a netem child qdisc. The crux of the issue is that hfsc is assuming that checking for cl-&gt;qdisc-&gt;q.qlen == 0 guarantees that it hasn&#39;t inserted the class in the vttree or eltree (which is not true for the netem duplicate case).</p> <p>This patch checks the n_active class variable to make sure that the code won&#39;t insert the class in the vttree or eltree twice, catering for the reentrant case.</p> <p>[1] https://lore.kernel.org/netdev/CAHcdcOm+03OD2j6R0=YHKqmy=VgJ8xEOKuP6c7mSgnp-TEJJbw@mail.gmail.com/</p> <p><strong>Affected:</strong> Linux</p> <p>In the Linux kernel, the following vulnerability has been resolved:</p> <p>net_sched: hfsc: Fix a UAF vulnerability in class with netem as child qdisc</p> <p>As described in Gerrard&#39;s report [1], we have a UAF case when an hfsc class has a netem child qdisc. The crux of the issue is that hfsc is assuming that checking for cl-&gt;qdisc-&gt;q.qlen == 0 guarantees that it hasn&#39;t inserted the class in the vttree or eltree (which is not true for the netem duplicate case).</p> <p>This patch checks the n_active class variable to make sure that the code won&#39;t insert the class in the vttree or eltree twice, catering for the reentrant case.</p> <p>[1] https://lore.kernel.org/netdev/CAHcdcOm+03OD2j6R0=YHKqmy=VgJ8xEOKuP6c7mSgnp-TEJJbw@mail.gmail.com/</p> https://cve.radiocsirt.org/vuln/cve-2025-37890