{"id":33244,"date":"2026-10-06T20:31:36","date_gmt":"2026-10-06T12:31:36","guid":{"rendered":"https:\/\/www.54iter.cn\/?vuln=cve-2026-98175"},"modified":"2026-10-06T20:31:36","modified_gmt":"2026-10-06T12:31:36","slug":"cve-2026-98175","status":"publish","type":"vuln","link":"https:\/\/www.54iter.cn\/?vuln=cve-2026-98175","title":{"rendered":"CVE-2026-98175 &#8211; In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: cancel r"},"content":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>smb: client: cancel reconnect work in clean_demultiplex_info()<\/p>\n<p>clean_demultiplex_info() cancels server-&gt;echo delayed work but not<br \/>\nserver-&gt;reconnect, which can cause a use-after-free when the<br \/>\ndemultiplex thread exits while a reconnect work is still queued:<\/p>\n<p>  cifs_demultiplex_thread()<br \/>\n    cifs_readv_from_socket()<br \/>\n      cifs_reconnect()<br \/>\n        __cifs_reconnect()<br \/>\n          cifs_queue_server_reconn()<br \/>\n            mod_delayed_work(cifsiod_wq, &amp;server-&gt;reconnect, 0)<br \/>\n    clean_demultiplex_info()<br \/>\n      cancel_delayed_work_sync(&amp;server-&gt;echo)   \/\/ echo canceled<br \/>\n                                                 \/\/ reconnect NOT canceled<br \/>\n      kfree_sensitive(server)                    \/\/ server freed<\/p>\n<p>  &#8230;later, on cifsiod_wq:<\/p>\n<p>  smb2_reconnect_server()<br \/>\n    server-&gt;srv_count  \/\/ UAF read of freed server<\/p>\n<p>Fix this by canceling server-&gt;reconnect delayed work in<br \/>\nclean_demultiplex_info() before the server is freed, the same way<br \/>\ncifs_put_tcp_session() already does.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>smb: client: cancel reconnect work in clean_demultiplex_info()<\/p>\n<p>clean_demultiplex_info() cancels server-&gt;echo delayed work but not<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-33244","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/33244","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=33244"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=33244"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=33244"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}