{"id":29181,"date":"2026-09-25T20:32:04","date_gmt":"2026-09-25T12:32:04","guid":{"rendered":"https:\/\/www.54iter.cn\/?vuln=cve-2026-98026"},"modified":"2026-09-25T20:32:04","modified_gmt":"2026-09-25T12:32:04","slug":"cve-2026-98026","status":"publish","type":"vuln","link":"https:\/\/www.54iter.cn\/?vuln=cve-2026-98026","title":{"rendered":"CVE-2026-98026 &#8211; In the Linux kernel, the following vulnerability has been resolved:\n\nnet: bridge: mcast: p"},"content":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>net: bridge: mcast: properly convert mglist to rcu<\/p>\n<p>Sashiko reported a bug [1] that br_multicast_del_port_group unlists the<br \/>\nport group not using proper rcu helper that preserves the next pointer and<br \/>\nafter that immediately frees the port group without waiting for rcu grace<br \/>\nperiod. The only rcu walker of mglist is br_multicast_list_adjacent() and<br \/>\nit turns out that function has always been buggy because mglist was never<br \/>\nproperly converted to RCU. Fix it by converting it to rcu and moving its<br \/>\ninitialization after eth_addr&#8217;s. Initializing p-&gt;next can use<br \/>\nRCU_INIT_POINTER because we have a barrier from the hlist_add_head_rcu call<br \/>\nlater, besides we&#8217;re initializing an unpublished structure anyway.<\/p>\n<p>[1] https:\/\/netdev-ai.bots.linux.dev\/sashiko\/#\/patchset\/20260826014200.362304-1-littleddfu%40gmail.com<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>net: bridge: mcast: properly convert mglist to rcu<\/p>\n<p>Sashiko reported a bug [1] that br_multicast_del_port_group unlists the<br \/>\nport gr<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-29181","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/29181","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=29181"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=29181"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=29181"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}