This showed up in my security email for last week.
http://nvd.nist.gov/nvd.cfm?cvename=CVE-2006-4507 (http://nvd.nist.gov/nvd.cfm?cvename=CVE-2006-4507)
QuoteUnspecified vulnerability in the TIFF viewer (possibly libTIFF) in the Photo Viewer in the Sony PlaystationPortable (PSP) 2.00 through 2.80 allows local users to execute arbitrary code via crafted TIFF images. NOTE: due to lack of details, it is not clear whether this is related to other issues such as CVE-2006-3464 or CVE-2006-3465.
...
Vulnerable software and versions
Sony, PlaystationPortable, 2.00
Sony, PlaystationPortable, 2.10
Sony, PlaystationPortable, 2.20
Sony, PlaystationPortable, 2.30
Sony, PlaystationPortable, 2.40
Sony, PlaystationPortable, 2.50
Sony, PlaystationPortable, 2.60
Sony, PlaystationPortable, 2.70
Sony, PlaystationPortable, 2.80
Funny think is, this is probably how people get their home brew software loaded.