{"id":24431,"date":"2026-09-16T20:32:18","date_gmt":"2026-09-16T12:32:18","guid":{"rendered":"https:\/\/www.54iter.cn\/?vuln=cve-2026-89774"},"modified":"2026-09-16T20:32:18","modified_gmt":"2026-09-16T12:32:18","slug":"cve-2026-89774","status":"publish","type":"vuln","link":"https:\/\/www.54iter.cn\/?vuln=cve-2026-89774","title":{"rendered":"CVE-2026-89774 &#8211; In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: SCO: hold"},"content":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>Bluetooth: SCO: hold sk properly in sco_conn_ready<\/p>\n<p>sk deref in sco_conn_ready must be done either under conn-&gt;lock, or<br \/>\nholding a refcount, to avoid concurrent close. conn-&gt;sk and parent sk is<br \/>\ncurrently accessed without either, and without checking parent-&gt;sk_state:<\/p>\n<p>    [Task 1]            [Task 2]<br \/>\n                        sco_sock_release<br \/>\n    sco_conn_ready<br \/>\n      sk = conn-&gt;sk<br \/>\n                          lock_sock(sk)<br \/>\n                            conn-&gt;sk = NULL<br \/>\n      lock_sock(sk)<br \/>\n                          release_sock(sk)<br \/>\n                          sco_sock_kill(sk)<br \/>\n       UAF on sk deref<\/p>\n<p>and similarly for access to sco_get_sock_listen() return value.<\/p>\n<p>Fix possible UAF by holding sk refcount in sco_conn_ready() and making<br \/>\nsco_get_sock_listen() increase refcount. Also recheck after lock_sock<br \/>\nthat the socket is still valid.  Adjust conn-&gt;sk locking so it&#8217;s<br \/>\nprotected also by lock_sock() of the associated socket if any.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>Bluetooth: SCO: hold sk properly in sco_conn_ready<\/p>\n<p>sk deref in sco_conn_ready must be done either under conn-&gt;lock, or<br \/>\nholding a r<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-24431","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/24431","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=24431"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=24431"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=24431"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}