{"id":21575,"date":"2026-09-12T04:31:22","date_gmt":"2026-09-11T20:31:22","guid":{"rendered":"https:\/\/www.54iter.cn\/?vuln=cve-2026-89653"},"modified":"2026-09-12T04:31:22","modified_gmt":"2026-09-11T20:31:22","slug":"cve-2026-89653","status":"publish","type":"vuln","link":"https:\/\/www.54iter.cn\/?vuln=cve-2026-89653","title":{"rendered":"CVE-2026-89653 &#8211; In the Linux kernel, the following vulnerability has been resolved:\n\nceph: reject export_t"},"content":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>ceph: reject export_targets ranks &gt;= CEPH_MAX_MDS in mdsmap decode<\/p>\n<p>MDSMap export_targets entries are monitor controlled. check_new_map()<br \/>\nuses each entry as a bit number in a fixed stack bitmap, so a rank<br \/>\noutside the protocol namespace can make set_bit() write past the end of<br \/>\nthe array.<\/p>\n<p>Reject ranks outside CEPH_MAX_MDS while decoding the map. Do not<br \/>\nvalidate against possible_max_rank here because maps may legitimately<br \/>\nreference ranks beyond a temporarily reduced max_mds.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>ceph: reject export_targets ranks &gt;= CEPH_MAX_MDS in mdsmap decode<\/p>\n<p>MDSMap export_targets entries are monitor controlled. check_new<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-21575","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/21575","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=21575"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=21575"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=21575"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}