Mozilla community member Tobias Schula reported that if
gfx.color_management.enablev4 preference is enabled manually in
about:config, some grayscale PNG images will be rendered
incorrectly and cause memory corruption during PNG decoding when certain color
profiles are in use. A crafted PNG image could use this flaw to leak data
through rendered images drawing from random memory. By default, this preference
is not enabled.
Vulmon