{"id":14899,"date":"2026-09-04T19:02:17","date_gmt":"2026-09-04T11:02:17","guid":{"rendered":"https:\/\/www.54iter.cn\/?vuln=cve-2026-63828"},"modified":"2026-09-04T19:02:17","modified_gmt":"2026-09-04T11:02:17","slug":"cve-2026-63828","status":"publish","type":"vuln","link":"https:\/\/www.54iter.cn\/?vuln=cve-2026-63828","title":{"rendered":"CVE-2026-63828 [HIGH] &#8211; In the Linux kernel, the following vulnerability has been resolved:\n\napparmor: mediate the"},"content":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>apparmor: mediate the implicit connect of TCP fast open sendmsg<\/p>\n<p>sendmsg()\/sendto() with MSG_FASTOPEN is a combination of connect(2) and<br \/>\nwrite(2): it opens the connection in the SYN. apparmor_socket_sendmsg()<br \/>\nonly checks AA_MAY_SEND, so a profile that grants send but denies connect<br \/>\nlets a confined task open an outbound TCP\/MPTCP connection that connect(2)<br \/>\nwould have refused, bypassing connect mediation.<\/p>\n<p>Mediate the implicit connect when MSG_FASTOPEN is set and a destination<br \/>\nis supplied. Add it to apparmor_socket_sendmsg() (not the shared<br \/>\naa_sock_msg_perm() helper, which recvmsg also uses) and call aa_sk_perm()<br \/>\ndirectly, mirroring the selinux and tomoyo fixes. sk_is_tcp() does not<br \/>\ncover MPTCP fast open, so the SOCK_STREAM\/IPPROTO_MPTCP arm is explicit.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>apparmor: mediate the implicit connect of TCP fast open sendmsg<\/p>\n<p>sendmsg()\/sendto() with MSG_FASTOPEN is a combination of connect(2<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-14899","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/14899","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=14899"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=14899"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=14899"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}