The remote host is missing an update to linux-2.6.24 announced via advisory DSA 1864-1.

https://secure1.securityspace.com/smysecure/catid.html?in=DSA%201864-1

A vulnerability has been discovered in the Linux kernel that may lead to privilege escalation. The Common Vulnerabilities and Exposures project identifies the following problem: CVE-2009-2692 Tavis Ormandy and Julien Tinnes discovered an issue with how the sendpage function is initialized in the proto_ops structure. Local users can exploit this vulnerability to gain elevated privileges. For the oldstable distribution (etch), this problem has been fixed in version 2.6.24-6~etchnhalf.8etch3. We recommend that you upgrade your linux-2.6.24 packages.