{"id":25618,"date":"2026-09-18T04:31:38","date_gmt":"2026-09-17T20:31:38","guid":{"rendered":"https:\/\/www.54iter.cn\/?vuln=cve-2026-90209"},"modified":"2026-09-18T04:31:38","modified_gmt":"2026-09-17T20:31:38","slug":"cve-2026-90209","status":"publish","type":"vuln","link":"https:\/\/www.54iter.cn\/?vuln=cve-2026-90209","title":{"rendered":"CVE-2026-90209 &#8211; In the Linux kernel, the following vulnerability has been resolved:\n\ns390\/debug: Fix deadl"},"content":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>s390\/debug: Fix deadlock during unregister<\/p>\n<p>Unregistering an s390dbf debug area while one of the associated debugfs<br \/>\nfiles is being written to can cause a deadlock:<\/p>\n<p>$ echo &gt;&#8230;\/vmur\/level    $ rmmod vmur<br \/>\n===================================================<br \/>\ndebugfs write<br \/>\ndebugfs_file_get()<br \/>\n                          debug_unregister()<br \/>\n                          mutex_lock(debug_mutex)<br \/>\n                          debugfs_remove()<br \/>\n                          wait for debugfs_file_put()<br \/>\ndebug_file_ops.write()<br \/>\ndebug_input()<br \/>\nmutex_lock(debug_mutex) ==&gt; DEADLOCK<\/p>\n<p>Fix this by splitting debug_unregister() into an s390dbf and debugfs<br \/>\npart, and running only the s390dbf part with debug_mutex locked.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>s390\/debug: Fix deadlock during unregister<\/p>\n<p>Unregistering an s390dbf debug area while one of the associated debugfs<br \/>\nfiles is being <\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-25618","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/25618","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=25618"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=25618"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=25618"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}