Created attachment 8668567 [details] call_stack.txt This was found while fuzzing freetype 2.5.5 This appears to be a fairly serious issue the the uninitialized values is used as a size in a memory allocation. This can lead to a crash or worse. This likely also affects Firefox OS since I believe it is used in the aosp kernel.
Verified that this is in both 2.5.5 and the latest released version 2.6.
This test case should be a .pcf file (Portable Compiled Format) which we do not support in firefox. So this is likely invalid unless it is used in fxos for some reason.
I don't know that we support this format anywhere. Even if the code is present on FxOS you either have the built-in fonts (which wouldn't be an attack) or downloadable web fonts which are WOFF (opentype).
I don't know that android supports this format either, but we could report it upstream to freetype and AOSP anyway.
I don't believe AOSP will be directly affected by this either, but it should definitely be reported upstream to freetype.
Already reported and fixed upstream. https://savannah.nongnu.org/bugs/?func=detailitem&item_id=46109