{"id":21406,"date":"2026-09-12T04:31:08","date_gmt":"2026-09-11T20:31:08","guid":{"rendered":"https:\/\/www.54iter.cn\/?vuln=cve-2026-89484"},"modified":"2026-09-12T04:31:08","modified_gmt":"2026-09-11T20:31:08","slug":"cve-2026-89484","status":"publish","type":"vuln","link":"https:\/\/www.54iter.cn\/?vuln=cve-2026-89484","title":{"rendered":"CVE-2026-89484 &#8211; In the Linux kernel, the following vulnerability has been resolved:\n\nlockd: fix NULL deref"},"content":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>lockd: fix NULL dereference on lockowner allocation failure<\/p>\n<p>nlmclnt_locks_init_private() installs NLM file lock operations even when<br \/>\nnlmclnt_find_lockowner() fails to allocate a lockowner. nlmclnt_proc()<br \/>\nthen returns -ENOMEM, but the VFS still tears down the partially<br \/>\ninitialized file_lock and calls locks_release_private().<\/p>\n<p>That invokes nlmclnt_locks_release_private(), which dereferences<br \/>\nfl-&gt;fl_u.nfs_fl.owner and crashes because the owner was never installed.<\/p>\n<p>Clear fl_ops before attempting to initialize the NLM private state, and<br \/>\ninstall the NLM lock operations only after a lockowner has been allocated<br \/>\nsuccessfully.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>lockd: fix NULL dereference on lockowner allocation failure<\/p>\n<p>nlmclnt_locks_init_private() installs NLM file lock operations even wh<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-21406","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/21406","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=21406"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=21406"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=21406"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}