{"id":33310,"date":"2026-10-06T20:31:44","date_gmt":"2026-10-06T12:31:44","guid":{"rendered":"https:\/\/www.54iter.cn\/?vuln=cve-2026-98241"},"modified":"2026-10-06T20:31:44","modified_gmt":"2026-10-06T12:31:44","slug":"cve-2026-98241","status":"publish","type":"vuln","link":"https:\/\/www.54iter.cn\/?vuln=cve-2026-98241","title":{"rendered":"CVE-2026-98241 &#8211; In the Linux kernel, the following vulnerability has been resolved:\n\nipv6: xfrm: use full"},"content":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>ipv6: xfrm: use full sockets in local error paths<\/p>\n<p>xfrm6_local_rxpmtu() and xfrm6_local_error() dereference skb-&gt;sk as if it<br \/>\nalways pointed at a full IPv6 socket.<\/p>\n<p>That is not guaranteed. TCP SYN-ACK skbs can be owned by a<br \/>\nTCP_NEW_SYN_RECV request_sock while the output path itself is driven by the<br \/>\nfull listener. If rerouting selects an IPv6 XFRM tunnel route with a lower<br \/>\nMTU, the local PMTU\/error handling path can reach these callbacks with that<br \/>\nmini-socket still attached to the skb.<\/p>\n<p>The callbacks then miscast the request socket as a full inet\/IPv6 socket and<br \/>\ncan read beyond the request_sock allocation when they access inet_sock or<br \/>\nipv6_pinfo state.<\/p>\n<p>Resolve the owner with skb_to_full_sk() in both callbacks and bail out when<br \/>\nno full socket is attached. This matches the surrounding XFRM IPv6 PMTU\/error<br \/>\nlogic, which already reasons about full sockets with skb_to_full_sk().<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>ipv6: xfrm: use full sockets in local error paths<\/p>\n<p>xfrm6_local_rxpmtu() and xfrm6_local_error() dereference skb-&gt;sk as if it<br \/>\nalways<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-33310","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/33310","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=33310"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=33310"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=33310"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}