How to turn a double release vulnerability in WhatsApp into a RCE vulnerability

< LineLen) { /* Decode LineLen items. */ Pixel = Line[i++]; /* Get next pixel from stream. */ if (EGifCompressOutput(Private, CrntCode) == GIF_ERROR) { return GIF_ERROR; } CrntCode = Pixel; /* If however the HashTable if full, we send a clear first and * Clear the hash table. */ if (Private->

RunningCode > = LZ_MAX_CODE) {/ * Time to do some clearance: * / if (EGifCompressOutput (Private, Private- > ClearCode) = = GIF_ERROR) {return GIF_ERROR;} Private- > RunningCode = Private- > EOFCode + 1; Private- > RunningBits = Private- > BitsPerPixel + 1; Private- > MaxCode1 = 1 RunningBits }} / * Preserve the current state of the compression algorithm: * / Private- > CrntCode = CrntCode; if (Private- > PixelCount = = 0) {/ * We are done-output last Code and flush output buffers: * / if (EGifCompressOutput (Private, CrntCode) = = GIF_ERROR) {return GIF_ERROR;} if (EGifCompressOutput (Private, Private- > EOFCode) = = GIF_ERROR) {return GIF_ERROR } if (EGifCompressOutput (Private, FLUSH_OUTPUT) = = GIF_ERROR) {return GIF_ERROR;}} return GIF_OK;} about how to turn double release vulnerabilities in WhatsApp into RCE vulnerabilities. I hope the above can be helpful and learn more. If you think the article is good, you can share it for more people to see.