Debian Linux Security Advisory 1921-1 – Peter Valchev discovered an error in expat, an XML parsing C library, when parsing certain UTF-8 sequences, which can be exploited to crash an application using the library.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/82293/dsa-1921-1.txt
Source: https://packetstormsecurity.com/files/82293/Debian-Linux-Security-Advisory-1921-1.html