{"id":29262,"date":"2026-09-25T20:32:16","date_gmt":"2026-09-25T12:32:16","guid":{"rendered":"https:\/\/www.54iter.cn\/?vuln=cve-2026-98108"},"modified":"2026-09-25T20:32:16","modified_gmt":"2026-09-25T12:32:16","slug":"cve-2026-98108","status":"publish","type":"vuln","link":"https:\/\/www.54iter.cn\/?vuln=cve-2026-98108","title":{"rendered":"CVE-2026-98108 &#8211; In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: L2CAP: fix"},"content":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>Bluetooth: L2CAP: fix chan mode for LE_CONN_REQ + EXT_FLOWCTL pchan<\/p>\n<p>l2cap_new_connection() sets default value of channel mode to match the<br \/>\nparent channel.  l2cap_le_connect_req() left this at the default, and<br \/>\ncreated L2CAP_MODE_EXT_FLOWCTL channels if listening pchan has that<br \/>\nmode.  This causes FLAG_DEFER_SETUP channels to reply to<br \/>\nL2CAP_LE_CONN_REQ with L2CAP_ECRED_CONN_RSP, which is incorrect.<\/p>\n<p>It can also result to stack OOB write (of l2cap_alloc_cid determined<br \/>\nvalues) in l2cap_ecred_rsp_defer(), as l2cap_le_connect_req() does not<br \/>\nlimit maximum number of deferred channels or check for duplicate ident.<\/p>\n<p>Fix by setting chan-&gt;mode correctly in l2cap_le_connect_req().<\/p>\n<p>Also check channel mode in l2cap_ecred_rsp_defer(), and do WARN_ON_ONCE<br \/>\ninstead of OOB write to make it less brittle.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>Bluetooth: L2CAP: fix chan mode for LE_CONN_REQ + EXT_FLOWCTL pchan<\/p>\n<p>l2cap_new_connection() sets default value of channel mode to m<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-29262","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/29262","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=29262"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=29262"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=29262"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}