{"id":17350,"date":"2026-09-05T02:31:01","date_gmt":"2026-09-04T18:31:01","guid":{"rendered":"https:\/\/www.54iter.cn\/?vuln=cve-2026-80846"},"modified":"2026-09-05T02:31:01","modified_gmt":"2026-09-04T18:31:01","slug":"cve-2026-80846","status":"publish","type":"vuln","link":"https:\/\/www.54iter.cn\/?vuln=cve-2026-80846","title":{"rendered":"CVE-2026-80846 &#8211; In the Linux kernel, the following vulnerability has been resolved:\n\nxfrm: drop ESP-in-TCP"},"content":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>xfrm: drop ESP-in-TCP packets with no ingress device<\/p>\n<p>ESP-in-TCP receives records through the TCP strparser. handle_esp()<br \/>\nrestores skb-&gt;dev from the saved skb_iif before passing the packet into<br \/>\nthe XFRM input path.<\/p>\n<p>Queued TCP data can be processed after the original ingress device has<br \/>\nbeen removed, for example during veth or net namespace teardown. In that<br \/>\ncase dev_get_by_index_rcu() returns NULL. The XFRM IPv4 and IPv6 input<br \/>\npaths both expect skb-&gt;dev to be valid while building the route lookup,<br \/>\nso queued ESP-in-TCP data can dereference a NULL device.<\/p>\n<p>Drop the packet if the saved ingress device can no longer be resolved.<br \/>\nSuch a packet can no longer be routed through the normal XFRM receive<br \/>\npath, and this preserves the existing behaviour for packets whose ingress<br \/>\ndevice still exists.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>xfrm: drop ESP-in-TCP packets with no ingress device<\/p>\n<p>ESP-in-TCP receives records through the TCP strparser. handle_esp()<br \/>\nrestores <\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-17350","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/17350","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=17350"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=17350"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=17350"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}