{"id":21465,"date":"2026-09-12T04:31:13","date_gmt":"2026-09-11T20:31:13","guid":{"rendered":"https:\/\/www.54iter.cn\/?vuln=cve-2026-89543"},"modified":"2026-09-12T04:31:13","modified_gmt":"2026-09-11T20:31:13","slug":"cve-2026-89543","status":"publish","type":"vuln","link":"https:\/\/www.54iter.cn\/?vuln=cve-2026-89543","title":{"rendered":"CVE-2026-89543 &#8211; In the Linux kernel, the following vulnerability has been resolved:\n\nsunrpc: fix use-after"},"content":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>sunrpc: fix use-after-free in __rpc_clnt_handle_event and __rpc_clnt_remove_pipedir<\/p>\n<p>Normal client creation goes through rpc_setup_pipedir(), which records<br \/>\nclnt-&gt;pipefs_sb, but the mount-event path in __rpc_clnt_handle_event()<br \/>\ncalls rpc_setup_pipedir_sb() directly and never refreshes that field.<br \/>\nThe umount path also removes the directory without clearing<br \/>\nclnt-&gt;pipefs_sb.<\/p>\n<p>After a late pipefs mount or any remount, rpc_clnt_remove_pipedir()<br \/>\ncompares the current superblock against a stale pipefs_sb pointer and<br \/>\nskips cleanup, leaving pipefs dentries whose inode private data still<br \/>\npoints at a freed rpc_clnt, leading to a potential use-after-free during<br \/>\nsubsequent rpc_info_open() or rpc_show_info() calls.<\/p>\n<p>Fix this by properly updating clnt-&gt;pipefs_sb upon mount events and<br \/>\nclearing it during unmount or failure paths.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>sunrpc: fix use-after-free in __rpc_clnt_handle_event and __rpc_clnt_remove_pipedir<\/p>\n<p>Normal client creation goes through rpc_setup_<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-21465","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/21465","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=21465"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=21465"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=21465"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}