https://vulnerability.circl.lu Contains only the most 10 recent entries. http://www.rssboard.org/rss-specification python-feedgen en Tue, 29 Sep 2026 02:35:02 +0000 https://vulnerability.circl.lu/vuln/cve-2026-74480 <p><strong>Affected:</strong> Linux</p> <p>In the Linux kernel, the following vulnerability has been resolved:</p> <p>net: bridge: stop fast-leave after deleting a port group</p> <p>br_multicast_leave_group() iterates mp-&gt;ports with pp = &amp;p-&gt;next in its fast-leave path. After br_multicast_del_pg() removes p, continuing the loop advances pp through the deleted entry.</p> <p>If multicast-to-unicast was enabled, the bridge can hold multiple port groups for the same port and group with different source MAC addresses. Once multicast-to-unicast is disabled, br_port_group_equal() matches those entries by port only. A fast leave can then delete one entry and continue from its stale next pointer, leaving mp-&gt;ports pointing at a deleted port group.</p> <p>Fast leave only needs to remove one matching port group. Break after br_multicast_del_pg() so the loop stops before dereferencing the removed entry.</p> <p><strong>Affected:</strong> Linux</p> <p>In the Linux kernel, the following vulnerability has been resolved:</p> <p>net: bridge: stop fast-leave after deleting a port group</p> <p>br_multicast_leave_group() iterates mp-&gt;ports with pp = &amp;p-&gt;next in its fast-leave path. After br_multicast_del_pg() removes p, continuing the loop advances pp through the deleted entry.</p> <p>If multicast-to-unicast was enabled, the bridge can hold multiple port groups for the same port and group with different source MAC addresses. Once multicast-to-unicast is disabled, br_port_group_equal() matches those entries by port only. A fast leave can then delete one entry and continue from its stale next pointer, leaving mp-&gt;ports pointing at a deleted port group.</p> <p>Fast leave only needs to remove one matching port group. Break after br_multicast_del_pg() so the loop stops before dereferencing the removed entry.</p> https://vulnerability.circl.lu/vuln/cve-2026-74480