{"id":40910,"date":"2026-10-19T00:31:32","date_gmt":"2026-10-18T16:31:32","guid":{"rendered":"https:\/\/www.54iter.cn\/?vuln=cve-2026-98438"},"modified":"2026-10-19T00:31:32","modified_gmt":"2026-10-18T16:31:32","slug":"cve-2026-98438","status":"publish","type":"vuln","link":"https:\/\/www.54iter.cn\/?vuln=cve-2026-98438","title":{"rendered":"CVE-2026-98438 &#8211; In the Linux kernel, the following vulnerability has been resolved:\n\nmptcp: options: fix u"},"content":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>mptcp: options: fix uninit-value in mptcp_write_data_fin<\/p>\n<p>When sending a DATA_FIN without data, and because the DATA_FIN occupies<br \/>\n1 octet of the connection-level sequence space [1], it is then required<br \/>\nto add a DSS mapping with specific values.<\/p>\n<p>If the checksum has been negotiated, it also needs to be computed, and<br \/>\nincluded in the outgoing packet, and thus the initial csum data needs to<br \/>\nbe reset to 0 as well. This is no longer the case since commit<br \/>\ncfcceb7a39fc (&#8220;tcp: shrink per-packet memset in __tcp_transmit_skb()&#8221;),<br \/>\nbecause the whole ext_copy structure is no longer zeroed by default.<\/p>\n<p>This seems to be the only case where use_map is changed and set<br \/>\nafterwards, so initialising the csum field only in this case, along with<br \/>\nother fields for this specific case.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>mptcp: options: fix uninit-value in mptcp_write_data_fin<\/p>\n<p>When sending a DATA_FIN without data, and because the DATA_FIN occupies<br \/>\n1<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-40910","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/40910","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=40910"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=40910"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=40910"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}