{"id":15098,"date":"2026-09-04T19:02:25","date_gmt":"2026-09-04T11:02:25","guid":{"rendered":"https:\/\/www.54iter.cn\/?vuln=cve-2026-64137"},"modified":"2026-09-04T19:02:25","modified_gmt":"2026-09-04T11:02:25","slug":"cve-2026-64137","status":"publish","type":"vuln","link":"https:\/\/www.54iter.cn\/?vuln=cve-2026-64137","title":{"rendered":"CVE-2026-64137 [HIGH] &#8211; In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: require"},"content":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>smb: client: require net admin for CIFS SWN netlink<\/p>\n<p>CIFS_GENL_CMD_SWN_NOTIFY is the userspace witness-notify command.  The<br \/>\nintended sender is the cifs.witness helper, but the generic-netlink<br \/>\noperation currently has no capability flag, so any local process can send<br \/>\nRESOURCE_CHANGE or CLIENT_MOVE notifications to the in-kernel witness<br \/>\nhandler.<\/p>\n<p>The same family exposes CIFS_GENL_MCGRP_SWN without multicast-group<br \/>\ncapability flags.  Register messages sent to that group include the witness<br \/>\nregistration id and, for NTLM-authenticated mounts, the username, domain,<br \/>\nand password attributes copied from the CIFS session.  An unprivileged<br \/>\nlocal process should not be able to join that group and receive those<br \/>\nmessages.<\/p>\n<p>Require CAP_NET_ADMIN for incoming SWN_NOTIFY commands with<br \/>\nGENL_ADMIN_PERM, and require CAP_NET_ADMIN over the network namespace for<br \/>\njoining the SWN multicast group with GENL_MCAST_CAP_NET_ADMIN.  The<br \/>\ncifs.witness service runs with the privileges needed for both operations.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>smb: client: require net admin for CIFS SWN netlink<\/p>\n<p>CIFS_GENL_CMD_SWN_NOTIFY is the userspace witness-notify command.  The<br \/>\nintende<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-15098","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/15098","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=15098"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=15098"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=15098"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}