In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
NFSD: Prevent client use-after-free during export state revocation<\/p>\n
nfsd4_revoke_export_states() has the same use-after-free as
\nnfsd4_revoke_states(): it drops nn->client_lock across
\nrevoke_one_stid() and the following read of clp->cl_minorversion, but
\nthe stateid reference it holds does not pin the client. A teardown
\nracing the dropped lock can free the client while revoke_one_stid()
\nstill dereferences it.<\/p>\n
exportfs -u drives this path through NFSD_CMD_UNLOCK_EXPORT, so an
\nadministrator removing an export can race a client expiry.<\/p>\n
Skip a client that is already expiring and otherwise pin it with
\ncl_rpc_users under client_lock before dropping the lock, matching
\nnfsd4_revoke_states().<\/p>\n","protected":false},"excerpt":{"rendered":"
In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
NFSD: Prevent client use-after-free during export state revocation<\/p>\n
nfsd4_revoke_export_states() has the same use-after-free as
\nnfs<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-24726","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/24726","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=24726"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=24726"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=24726"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}