{"id":24677,"date":"2026-09-16T20:32:38","date_gmt":"2026-09-16T12:32:38","guid":{"rendered":"https:\/\/www.54iter.cn\/?vuln=cve-2026-89990"},"modified":"2026-09-16T20:32:38","modified_gmt":"2026-09-16T12:32:38","slug":"cve-2026-89990","status":"publish","type":"vuln","link":"https:\/\/www.54iter.cn\/?vuln=cve-2026-89990","title":{"rendered":"CVE-2026-89990 &#8211; In the Linux kernel, the following vulnerability has been resolved:\n\nceph: lock mutex in c"},"content":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>ceph: lock mutex in ceph_mds_check_access()<\/p>\n<p>MDS session OPEN handling replaces mdsc-&gt;s_cap_auths under<br \/>\nmdsc-&gt;mutex, freeing the previous array and its strings.<\/p>\n<p>ceph_mds_check_access() traverses this array without holding the<br \/>\nmutex.  A concurrent session reopen can therefore free the array while<br \/>\nit is being inspected, resulting in a use-after-free like this:<\/p>\n<p>  Unable to handle kernel paging request at virtual address 003aaad64b2c8bb9<br \/>\n  [&#8230;]<br \/>\n  Internal error: Oops: 0000000096000004 [#1]  SMP<br \/>\n  Modules linked in:<br \/>\n  CPU: 56 UID: 2953037534 PID: 1253231 Comm: php-cgi8.4 Not tainted 6.18.45-i2-ampere #1146 NONE<br \/>\n  [..]<br \/>\n  pc : ceph_mds_check_access+0xd4\/0x550<br \/>\n  lr : ceph_mds_check_access+0xc8\/0x550<br \/>\n  [&#8230;]<br \/>\n  Call trace:<br \/>\n   ceph_mds_check_access+0xd4\/0x550 (P)<br \/>\n   ceph_atomic_open+0x138\/0xbe8<br \/>\n   path_openat+0xa24\/0xfa8<br \/>\n   do_filp_open+0x94\/0x158<br \/>\n   do_sys_openat2+0x88\/0xf8<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>ceph: lock mutex in ceph_mds_check_access()<\/p>\n<p>MDS session OPEN handling replaces mdsc-&gt;s_cap_auths under<br \/>\nmdsc-&gt;mutex, freeing the pr<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-24677","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/24677","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=24677"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=24677"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=24677"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}