{"id":25665,"date":"2026-09-18T04:31:42","date_gmt":"2026-09-17T20:31:42","guid":{"rendered":"https:\/\/www.54iter.cn\/?vuln=cve-2026-90256"},"modified":"2026-09-18T04:31:42","modified_gmt":"2026-09-17T20:31:42","slug":"cve-2026-90256","status":"publish","type":"vuln","link":"https:\/\/www.54iter.cn\/?vuln=cve-2026-90256","title":{"rendered":"CVE-2026-90256 &#8211; In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: L2CAP: use"},"content":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>Bluetooth: L2CAP: use proto_lock for l2cap_data to fix l2cap_disconn_ind<\/p>\n<p>hci_conn::l2cap_data is accessed without locks in l2cap_disconn_ind via<br \/>\nhci_conn_timeout (disc_work) -&gt; hci_proto_disconn_ind -&gt;<br \/>\nl2cap_disconn_ind.  This is UAF if the l2cap_conn is deleted<br \/>\nconcurrently.<\/p>\n<p>disc_work is disabled sync in hci_conn_del(), so we cannot take<br \/>\nhci_dev_lock in disc_work.<\/p>\n<p>Fix by using proto_lock to guard l2cap_data, in addition to hdev-&gt;lock<br \/>\nwhich is held in other access paths.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>Bluetooth: L2CAP: use proto_lock for l2cap_data to fix l2cap_disconn_ind<\/p>\n<p>hci_conn::l2cap_data is accessed without locks in l2cap_d<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-25665","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/25665","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=25665"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=25665"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=25665"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}