{"id":14930,"date":"2026-09-04T19:02:18","date_gmt":"2026-09-04T11:02:18","guid":{"rendered":"https:\/\/www.54iter.cn\/?vuln=cve-2026-63867"},"modified":"2026-09-04T19:02:18","modified_gmt":"2026-09-04T11:02:18","slug":"cve-2026-63867","status":"publish","type":"vuln","link":"https:\/\/www.54iter.cn\/?vuln=cve-2026-63867","title":{"rendered":"CVE-2026-63867 [HIGH] &#8211; In the Linux kernel, the following vulnerability has been resolved:\n\nmptcp: close TOCTOU r"},"content":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>mptcp: close TOCTOU race while computing rcv_wnd<\/p>\n<p>The MPTCP output path access locklessly the MPTCP-level ack_seq<br \/>\nin multiple times, using possibly different values for the data_ack<br \/>\nin the DSS option and to compute the announced rcv wnd for the same<br \/>\npacket.<\/p>\n<p>Refactor the cote to avoid inconsistencies which may confuse the<br \/>\npeer. Also ensure that the MPTCP level rcv wnd is updated only when<br \/>\nthe egress packet actually contains a DSS ack.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>mptcp: close TOCTOU race while computing rcv_wnd<\/p>\n<p>The MPTCP output path access locklessly the MPTCP-level ack_seq<br \/>\nin multiple times<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-14930","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/14930","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=14930"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=14930"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=14930"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}