{"id":28988,"date":"2026-09-25T20:31:39","date_gmt":"2026-09-25T12:31:39","guid":{"rendered":"https:\/\/www.54iter.cn\/?vuln=cve-2026-97556"},"modified":"2026-09-25T20:31:39","modified_gmt":"2026-09-25T12:31:39","slug":"cve-2026-97556","status":"publish","type":"vuln","link":"https:\/\/www.54iter.cn\/?vuln=cve-2026-97556","title":{"rendered":"CVE-2026-97556 &#8211; In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: avoid le"},"content":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>smb: client: avoid leaking refcount when cifs_sb_tlink() fails<\/p>\n<p>cifs_oplock_break() takes over the reference that<br \/>\ncifs_queue_oplock_break() acquired when it queued the work, and drops it<br \/>\nwith _cifsFileInfo_put() once the break has been processed.<\/p>\n<p>Only in setups with &#8220;-o multiuser&#8221;, cifs_sb_tlink() may fail, at which<br \/>\npoint cifs_oplock_break() returns without putting the file reference,<br \/>\nmirroring the reference leak we already fixed in the companion patch to<br \/>\ncifs_queue_oplock_break().<\/p>\n<p>This would trigger a crash due to busy inodes on the next unmount:<\/p>\n<p>  BUG: Dentry &#8230; still in use (1) [unmount of cifs cifs]<br \/>\n  VFS: Busy inodes after unmount of cifs (cifs)<\/p>\n<p>Drop the reference on that path as well. Doing so before the out label<br \/>\nmirrors the normal path, which also puts the reference before<br \/>\ncifs_done_oplock_break().<\/p>\n<p>Found by Sashiko code review. The failure path was not exercised at<br \/>\nruntime.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>smb: client: avoid leaking refcount when cifs_sb_tlink() fails<\/p>\n<p>cifs_oplock_break() takes over the reference that<br \/>\ncifs_queue_oplock<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-28988","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/28988","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=28988"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=28988"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=28988"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}