The remote host is missing an update to linux-2.6 announced via advisory DSA 1381-1.

https://secure1.securityspace.com/smysecure/catid.html?in=DSA%201381-1

Several local vulnerabilities have been discovered in the Linux kernel that may lead to a denial of service or the execution of arbitrary code. The Common Vulnerabilities and Exposures project identifies the following problems: CVE-2006-5755 The NT bit maybe leaked into the next task which can local attackers to cause a Denial of Service (crash) on systems which run the 'amd64' flavour kernel. The stable distribution ('etch') was not believed to be vulnerable to this issue at the time of release, however Bastian Blank discovered that this issue still applied to the 'xen-amd64' and 'xen-vserver-amd64' flavours, and is resolved by this DSA. CVE-2007-4133 Hugh Dickins discovered a potential local DoS (panic) in hugetlbfs. A misconversion of hugetlb_vmtruncate_list to prio_tree may allow local users to trigger a BUG_ON() call in exit_mmap. CVE-2007-4573 Wojciech Purczynski discovered a vulnerability that can be exploited by a local user to obtain superuser privileges on x86_64 systems. This resulted from improper clearing of the high bits of registers during ia32 system call emulation. This vulnerability is relevant to the Debian amd64 port as well as users of the i386 port who run the amd64 linux-image flavour. DSA-1378 resolved this problem for the 'amd64' flavour kernels, but Tim Wickberg and Ralf HemmenstÃdt reported an outstanding issue with the 'xen-amd64' and 'xen-vserver-amd64' issues that is resolved by this DSA. CVE-2007-5093 Alex Smith discovered an issue with the pwc driver for certain webcam devices. If the device is removed while a userspace application has it open, the driver will wait for userspace to close the device, resulting in a blocked USB subsystem. This issue is of low security impact as it requires the attacker to either have physical access to the system or to convince a user with local access to remove the device on their behalf. These problems have been fixed in the stable distribution in version 2.6.18.dfsg.1-13etch4. At the time of this DSA, only the build for the amd64 architecture is available. Due to the severity of the amd64-specific issues, we are releasing an incomplete update. This advisory will be updated once other architecture builds become available. We recommend that you upgrade your kernel package immediately and reboot