Mandriva Linux Security Advisory – A buffer overflow in PCRE 7.x before 7.6 allows remote attackers to execute arbitrary code via a regular expression that contains a character class with a large number of characters with Unicode code points greater than 255.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/64118/MDVSA-2008-053.txt
Source: https://packetstormsecurity.com/files/64118/Mandriva-Linux-Security-Advisory-2008-053.html