In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
Bluetooth: L2CAP: access chan->conn safely in get\/setsockopt<\/p>\n
Since commit b66774b48dd9 (“Bluetooth: L2CAP: Fix UAF in channel timeout by holding conn ref”)
\nl2cap_chan::conn has held reference and remains non-NULL also after the
\ncorresponding hci_conn is deleted. In this state accessing various
\nfields eg. hci_conn::hdev is invalid, which leads to KASAN crash in
\nl2cap_sock_setsockopt() access of conn->hcon->hdev.<\/p>\n
Check l2cap_chan::conn.hcon corresponds to an alive hci_conn before
\ntrying to use it in l2cap_sock.c. Hold l2cap_chan_lock() in
\ngetsockopt\/setsockopt to ensure it stays alive, and to avoid data races
\nin l2cap_chan fields.<\/p>\n","protected":false},"excerpt":{"rendered":"
In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
Bluetooth: L2CAP: access chan->conn safely in get\/setsockopt<\/p>\n
Since commit b66774b48dd9 (“Bluetooth: L2CAP: Fix UAF in channel time<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-25502","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/25502","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=25502"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=25502"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=25502"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}