Redhat » Enterprise Linux Workstation » 4.0 : Security Vulnerabilities, CVEs, Published In 2012 (Code Execution)

Heap-based buffer overflow in the Lookup_MarkMarkPos function in the HarfBuzz module (harfbuzz-gpos.c), as used by Qt before 4.7.4 and Pango, allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via a crafted font file.