{"id":6711,"date":"2026-09-04T18:49:14","date_gmt":"2026-09-04T10:49:14","guid":{"rendered":"https:\/\/www.54iter.cn\/?vuln=cve-2026-68457"},"modified":"2026-09-04T18:49:14","modified_gmt":"2026-09-04T10:49:14","slug":"cve-2026-68457","status":"publish","type":"vuln","link":"https:\/\/www.54iter.cn\/?vuln=cve-2026-68457","title":{"rendered":"CVE-2026-68457 [CRITICAL] &#8211; In the Linux kernel, the following vulnerability has been resolved:\n\nksmbd: use opener cre"},"content":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>ksmbd: use opener credentials for FSCTL mutations<\/p>\n<p>SET_SPARSE, SET_ZERO_DATA and SET_COMPRESSION operate on an open SMB<br \/>\nhandle but call VFS xattr, fallocate or fileattr helpers with the current<br \/>\nksmbd worker credentials. Those helpers can revalidate inode permissions,<br \/>\nownership and LSM policy independently of the SMB handle access mask.<\/p>\n<p>Run each operation with the credentials captured in the target file when<br \/>\nthe handle was opened. Keep credential handling local to these single-file<br \/>\nFSCTLs rather than applying session credentials to the complete IOCTL<br \/>\nhandler, which also contains handle-less and multi-handle operations.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>ksmbd: use opener credentials for FSCTL mutations<\/p>\n<p>SET_SPARSE, SET_ZERO_DATA and SET_COMPRESSION operate on an open SMB<br \/>\nhandle but <\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-6711","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/6711","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=6711"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=6711"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=6711"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}