The remote host is missing an update to kernel-image-2.4.18-1-alpha announced via advisory DSA 417-2.

https://secure1.securityspace.com/smysecure/catid.html?in=DSA%20417-2

Since DSA 417-1 lacked fixed kernel image files for the alpha architecture these are added now. For completeness below is the original advisory: Paul Starzetz discovered a flaw in bounds checking in mremap() in the Linux kernel (present in version 2.4.x and 2.6.x) which may allow a local attacker to gain root privileges. Version 2.2 is not affected by this bug. For the stable distribution (woody) this problem has been fixed in version 2.4.18-13 for the alpha architecture. For the unstable distribution (sid) this problem will be fixed soon with newly uploaded packages. We recommend that you upgrade your kernel packages. This problem has