In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
Bluetooth: L2CAP: fix UAF in l2cap_le_connect_rsp<\/p>\n
l2cap_le_connect_rsp() obtains a channel via
\n__l2cap_get_chan_by_ident() but neither holds a reference nor uses
\nl2cap_chan_hold_unless_zero() before locking and operating on it.
\nA concurrent l2cap_chan_del() triggered by a remote disconnect can
\nfree the channel between the lookup and l2cap_chan_lock(), causing
\na use-after-free.<\/p>\n
The BR\/EDR counterpart l2cap_connect_rsp() and the sibling handler
\nl2cap_le_command_rej() already use l2cap_chan_hold_unless_zero()
\nto safely hold a reference, but l2cap_le_connect_rsp() was left
\nunprotected.<\/p>\n
Fix by adding l2cap_chan_hold_unless_zero() after the ident lookup
\nand l2cap_chan_put() on the exit path, consistent with other L2CAP
\nresponse handlers.<\/p>\n","protected":false},"excerpt":{"rendered":"
In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
Bluetooth: L2CAP: fix UAF in l2cap_le_connect_rsp<\/p>\n
l2cap_le_connect_rsp() obtains a channel via
\n__l2cap_get_chan_by_ident() but nei<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-8832","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/8832","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=8832"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=8832"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=8832"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}