The ipt_recent kernel module (ipt_recent.c) in Linux kernel before 2.6.12 when running on 64-bit processors such as AMD64 allows remote attackers to cause a denial of service (kernel panic) via certain attacks such as SSH brute force which leads to memset calls using a length based on the u_int32_t type acting on an array of unsigned long elements a different vulnerability than CVE-2005-2873.