In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
net\/iucv: take a reference on the socket found in afiucv_hs_rcv()<\/p>\n
afiucv_hs_rcv() looks up the destination socket under iucv_sk_list.lock,
\ndrops the lock, and then passes the socket to the afiucv_hs_callback_*()
\nhandlers without holding a reference. AF_IUCV sockets are not
\nRCU-protected and are freed synchronously by iucv_sock_kill() ->
\nsock_put(), so a concurrent close can free the socket in the window
\nbetween read_unlock() and the handler, which then dereferences freed
\nmemory (for example sk->sk_data_ready() in afiucv_hs_callback_syn()).<\/p>\n
Take a reference with sock_hold() while the socket is still on the list
\nand release it with sock_put() once the handler has run.<\/p>\n","protected":false},"excerpt":{"rendered":"
In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
net\/iucv: take a reference on the socket found in afiucv_hs_rcv()<\/p>\n
afiucv_hs_rcv() looks up the destination socket under iucv_sk_li<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-5459","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/5459","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=5459"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=5459"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=5459"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}