{"id":7472,"date":"2026-09-04T18:49:34","date_gmt":"2026-09-04T10:49:34","guid":{"rendered":"https:\/\/www.54iter.cn\/?vuln=cve-2026-74480"},"modified":"2026-09-04T18:49:34","modified_gmt":"2026-09-04T10:49:34","slug":"cve-2026-74480","status":"publish","type":"vuln","link":"https:\/\/www.54iter.cn\/?vuln=cve-2026-74480","title":{"rendered":"CVE-2026-74480 [CRITICAL] &#8211; In the Linux kernel, the following vulnerability has been resolved:\n\nnet: bridge: stop fas"},"content":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>net: bridge: stop fast-leave after deleting a port group<\/p>\n<p>br_multicast_leave_group() iterates mp-&gt;ports with pp = &amp;p-&gt;next in<br \/>\nits fast-leave path. After br_multicast_del_pg() removes p,<br \/>\ncontinuing the loop advances pp through the deleted entry.<\/p>\n<p>If multicast-to-unicast was enabled, the bridge can hold multiple port<br \/>\ngroups for the same port and group with different source MAC<br \/>\naddresses. Once multicast-to-unicast is disabled,<br \/>\nbr_port_group_equal() matches those entries by port only. A fast leave<br \/>\ncan then delete one entry and continue from its stale next pointer,<br \/>\nleaving mp-&gt;ports pointing at a deleted port group.<\/p>\n<p>Fast leave only needs to remove one matching port group. Break after<br \/>\nbr_multicast_del_pg() so the loop stops before dereferencing the<br \/>\nremoved entry.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>net: bridge: stop fast-leave after deleting a port group<\/p>\n<p>br_multicast_leave_group() iterates mp-&gt;ports with pp = &amp;p-&gt;next in<br \/>\nits f<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-7472","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/7472","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln"}],"about":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/types\/vuln"}],"wp:attachment":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=7472"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=7472"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=7472"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}