Sebastien Helleu discovered that an error in the handling of color codes in the weechat IRC client could cause an out-of-bounds read of an internal color array. This can be used by an attacker to crash user clients via a crafted PRIVMSG command. The weechat version in the oldstable distribution is not affected by this problem. For the stable distribution , this problem has been fixed in version 0.2.6-1+lenny1. For the testing distribution , this problem will be fixed soon. For the unstable distribution , this problem has been fixed in version 0.2.6.1-1. We recommend that you upgrade your weechat packages.