{"id":3390,"date":"2026-09-04T04:59:40","date_gmt":"2026-09-03T20:59:40","guid":{"rendered":"https:\/\/www.54iter.cn\/?p=3390"},"modified":"2026-09-04T04:59:40","modified_gmt":"2026-09-03T20:59:40","slug":"cve-2026-80738","status":"publish","type":"vuln","link":"https:\/\/www.54iter.cn\/?vuln=cve-2026-80738","title":{"rendered":"CVE-2026-80738 &#8211; In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Check sk_state b"},"content":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>bpf: Check sk_state before sk_protocol in bpf_tcp_*_syncookie<\/p>\n<p>bpf_tcp_gen_syncookie and bpf_tcp_check_syncookie accept a socket pointer<br \/>\n&#8216;sk&#8217; with argument type ARG_PTR_TO_BTF_ID_SOCK_COMMON. However, they access<br \/>\nsk-&gt;sk_protocol without validating whether &#8216;sk&#8217; represents a full socket.<\/p>\n<p>Fix this issue by checking sk-&gt;sk_state != TCP_LISTEN before inspecting<br \/>\nsk-&gt;sk_protocol in both bpf_tcp_gen_syncookie and bpf_tcp_check_syncookie.<br \/>\nSince mini-sockets are never in the TCP_LISTEN state, the condition<br \/>\nshort-circuits and prevents dereferencing fullsock-specific fields.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>bpf: Check sk_state before sk_protocol in bpf_tcp_*_syncookie<\/p>\n<p>bpf_tcp_gen_syncookie and bpf_tcp_check_syncookie accept a socket po<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-3390","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/3390","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=3390"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=3390"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=3390"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}