CVE 2009-2674

Integer overflow in javaws.exe in Sun Java Web Start in Sun Java Runtime Environment (JRE) in JDK and JRE 6 before Update 15 allows context-dependent attackers to execute arbitrary code via a crafted JPEG image that is not properly handled during display to a splash screen, which triggers a heap-based buffer overflow.

See the CVE page on Mitre.org for more details.