In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
Bluetooth: btusb: Fix UAF of btusb_data by rx_work<\/p>\n
btusb_close() and btusb_flush() cancel data->rx_work with the
\nasynchronous cancel_delayed_work(), so if btusb_rx_work() is already
\nrunning on another CPU it keeps running after the cancel returns.<\/p>\n
btusb_disconnect() calls hci_unregister_dev(), which invokes
\nbtusb_close(), and then frees the btusb_data. A still running
\nbtusb_rx_work() then dereferences the freed data:<\/p>\n
\twhile ((skb = skb_dequeue(&data->acl_q)))
\n\t\tdata->recv_acl(data->hdev, skb);<\/p>\n
Use cancel_delayed_work_sync() instead. In btusb_close() the cancel also
\nhas to happen after btusb_stop_traffic(), otherwise an URB completion
\nracing with the cancel can requeue the work right after it has been
\nwaited for.<\/p>\n","protected":false},"excerpt":{"rendered":"
In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
Bluetooth: btusb: Fix UAF of btusb_data by rx_work<\/p>\n
btusb_close() and btusb_flush() cancel data->rx_work with the
\nasynchronous canc<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-29133","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/29133","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=29133"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=29133"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=29133"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}