From the Mageia advisory:
A null pointer de-reference flaw was found in the way Freetype font
rendering engine handled Glyph bitmap distribution format (BDF) fonts.
A remote attacker could provide a specially-crafted BDF font file, which
once processed in an application linked against FreeType would lead to
that application crash (CVE-2012-5668).
An out-of heap-based buffer read flaw was found in the way FreeType font
rendering engine performed parsing of glyph information and relevant
bitmaps for glyph bitmap distribution format (BDF). A remote attacker
could provide a specially-crafted BDF font file, which once opened in an
application linked against FreeType would lead to that application crash
(CVE-2012-5669).
An out-of heap-based buffer write flaw was found in the way FreeType font
rendering engine performed parsing of glyph information and relevant
bitmaps for glyph bitmap distribution format (BDF). A remote attacker
could provide a specially-crafted font file, which once opened in an
application linked against FreeType would lead to that application crash,
or, potentially, arbitrary code execution with the privileges of the
user running the application (CVE-2012-5670).
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