diff --git a/fs/smb/server/vfs.c b/fs/smb/server/vfs.c
index 4c3cf376a756..286536f75144 100644
--- a/fs/smb/server/vfs.c
+++ b/fs/smb/server/vfs.c
@@ -723,6 +723,19 @@ retry:
 		goto out3;
 	}
 
+	/*
+	 * See MS-FSA 2.1.5.15.12.
+	 * An overwrite rename must fail with STATUS_ACCESS_DENIED if the
+	 * existing target still has a non-POSIX open.
+	 */
+	if (!(flags & (RENAME_NOREPLACE | RENAME_EXCHANGE)) &&
+	    d_inode(rd.new_dentry) &&
+	    d_inode(rd.new_dentry) != d_inode(old_child) &&
+	    ksmbd_has_other_nonposix_open(rd.new_dentry)) {
+		err = -EACCES;
+		goto out3;
+	}
+
 	err = ksmbd_vfs_check_rename_share(work, old_path);
 	if (err)
 		goto out3;
diff --git a/fs/smb/server/vfs_cache.c b/fs/smb/server/vfs_cache.c
index 028bc1b0f652..90348a409162 100644
--- a/fs/smb/server/vfs_cache.c
+++ b/fs/smb/server/vfs_cache.c
@@ -1137,6 +1137,33 @@ struct ksmbd_file *ksmbd_lookup_fd_inode(struct dentry *dentry)
 	return NULL;
 }
 
+bool ksmbd_has_other_nonposix_open(struct dentry *dentry)
+{
+	struct ksmbd_file *fp;
+	struct inode *inode = d_inode(dentry);
+	unsigned int id;
+	bool ret = false;
+
+	if (!inode)
+		return false;
+
+	read_lock(&global_ft.lock);
+	idr_for_each_entry(global_ft.idr, fp, id) {
+		if (READ_ONCE(fp->f_state) != FP_INITED)
+			continue;
+		if (inode != file_inode(fp->filp))
+			continue;
+		if (fp->is_posix_ctxt)
+			continue;
+
+		ret = true;
+		break;
+	}
+	read_unlock(&global_ft.lock);
+
+	return ret;
+}
+
 bool ksmbd_has_nonposix_open_child(struct ksmbd_file *old_fp)
 {
 	struct dentry *dentry = old_fp->filp->f_path.dentry;
diff --git a/fs/smb/server/vfs_cache.h b/fs/smb/server/vfs_cache.h
index 9dca617bc429..5cac022b540b 100644
--- a/fs/smb/server/vfs_cache.h
+++ b/fs/smb/server/vfs_cache.h
@@ -212,6 +212,7 @@ bool ksmbd_has_stream_without_delete_share(struct ksmbd_file *fp);
 int ksmbd_close_fd_app_instance_id(char *app_instance_id);
 struct ksmbd_file *ksmbd_lookup_fd_cguid(char *cguid);
 struct ksmbd_file *ksmbd_lookup_fd_inode(struct dentry *dentry);
+bool ksmbd_has_other_nonposix_open(struct dentry *dentry);
 bool ksmbd_has_nonposix_open_child(struct ksmbd_file *old_fp);
 unsigned int ksmbd_open_durable_fd(struct ksmbd_file *fp);
 struct ksmbd_file *ksmbd_open_fd(struct ksmbd_work *work, struct file *filp);