Stack-based buffer overflow in the as_bad function in messages.c in the GNU as (gas) assembler in Free Software Foundation GNU Binutils before 20050721 allows attackers to execute arbitrary code via a .c file with crafted inline assembly code.
http://www.vupen.com/english/advisories/2006/3307
http://www.ubuntu.com/usn/usn-336-1
http://secunia.com/advisories/21530