The remote host is missing an update to linux-2.6 announced via advisory DSA 2094-1.

https://secure1.securityspace.com/smysecure/catid.html?in=DSA%202094-1

Several vulnerabilities have been discovered in the Linux kernel that may lead to a denial of service or privilege escalation. The Common Vulnerabilities and Exposures project identifies the following problems: CVE-2009-4895 Kyle Bader reported an issue in the tty subsystem that allows local users to create a denial of service (NULL pointer dereference). CVE-2010-2226 Dan Rosenberg reported an issue in the xfs filesystem that allows local users to copy and read a file owned by another user, for which they only have write permissions, due to a lack of permission checking in the XFS_SWAPEXT ioctl. CVE-2010-2240 Rafal Wojtczuk reported an issue that allows users to obtain escalated privileges. Users must already have sufficient privileges to execute or connect clients to an Xorg server. CVE-2010-2248 Suresh Jayaraman discovered an issue in the CIFS filesystem. A malicious file server can set an incorrect CountHigh value, resulting in a denial of service (BUG_ON() assertion). CVE-2010-2521 Neil Brown reported an issue in the NFSv4 server code. A malicious client could trigger a denial of service (Oops) on a server due to a bug in the read_buf() routine. CVE-2010-2798 Bob Peterson reported an issue in the GFS2 file system. A file system user could cause a denial of service (Oops) via certain rename operations. CVE-2010-2803 Kees Cook reported an issue in the DRM (Direct Rendering Manager) subsystem. Local users with sufficient privileges (local X users or members of the 'video' group on a default Debian install) could acquire access to sensitive kernel memory. CVE-2010-2959 Ben Hawkes discovered an issue in the AF_CAN socket family. An integer overflow condition may allow local users to obtain elevated privileges. CVE-2010-3015 Toshiyuki Okajima reported an issue in the ext4 filesystem. Local users could trigger a denial of service (BUG assertion) by generating a specific set of filesystem operations. This update also includes fixes a regression introduced by a previous update. See the referenced Debian bug page for details. For the stable distribution (lenny), this problem has been fixed in version 2.6.26-24lenny1. We recommend that you upgrade your linux-2.6 and user-mode-linux