In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
ksmbd: pin conn during async oplock break notification<\/p>\n
smb2_oplock_break_noti() and smb2_lease_break_noti() store a ksmbd_conn
\npointer in an async ksmbd_work and then queue that work on ksmbd-io. The
\nwork only increments conn->r_count, which prevents teardown from passing
\nthe pending-request wait after the increment, but it does not pin the
\nstruct ksmbd_conn object.<\/p>\n
If connection teardown races with an oplock break notification, the last
\nconn reference can be dropped before the queued worker finishes. The
\nworker then uses the freed conn in ksmbd_conn_write() and
\nksmbd_conn_r_count_dec().<\/p>\n
Take a real conn reference when publishing the conn pointer to the async
\nwork item, and drop it after the notification work has decremented
\nr_count. Apply the same lifetime rule to lease break notification, which
\nuses the same work->conn pattern.<\/p>\n","protected":false},"excerpt":{"rendered":"
In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
ksmbd: pin conn during async oplock break notification<\/p>\n
smb2_oplock_break_noti() and smb2_lease_break_noti() store a ksmbd_conn
\npoi<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-5446","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/5446","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=5446"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=5446"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=5446"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}