{"id":24638,"date":"2026-09-16T20:32:35","date_gmt":"2026-09-16T12:32:35","guid":{"rendered":"https:\/\/www.54iter.cn\/?vuln=cve-2026-89951"},"modified":"2026-09-16T20:32:35","modified_gmt":"2026-09-16T12:32:35","slug":"cve-2026-89951","status":"publish","type":"vuln","link":"https:\/\/www.54iter.cn\/?vuln=cve-2026-89951","title":{"rendered":"CVE-2026-89951 &#8211; In the Linux kernel, the following vulnerability has been resolved:\n\nbatman-adv: fix stale"},"content":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>batman-adv: fix stale receive device on merged fragments<\/p>\n<p>Fragment reassembly reuses the skb from the highest-numbered buffered<br \/>\nfragment as the merged packet. When that fragment was received on a hard<br \/>\ninterface which is deleted before the chain completes, the merged skb can<br \/>\nre-enter the receive path with a stale skb-&gt;dev and skb_iif.<\/p>\n<p>batadv_batman_skb_recv() passes such merged packets through the normal<br \/>\nreceive handlers again. DAT and bridge loop avoidance both derive the ARP<br \/>\nheader length from skb-&gt;dev, so they can dereference the freed net_device<br \/>\nbefore the packet reaches the local mesh interface.<\/p>\n<p>Refresh the receive device metadata from the current receive device before<br \/>\nrunning the packet handlers. This keeps internally reinjected merged<br \/>\nfragments consistent with the normal receive path after hard interface<br \/>\nteardown.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>batman-adv: fix stale receive device on merged fragments<\/p>\n<p>Fragment reassembly reuses the skb from the highest-numbered buffered<br \/>\nfra<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-24638","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/24638","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=24638"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=24638"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=24638"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}