GNOME GdkPixbuf (aka GDK-PixBuf) before 2.42.8 allows a heap-based buffer overflow when compositing or clearing frames in GIF files, as demonstrated by io-gif-animation.c composite_frame. This overflow is controllable and could be abused for code execution, especially on 32-bit systems. CREATE(Triage):(User=admin) CVE-2021-46829 (https://nvd.nist.gov/vuln/detail/CVE-2021-46829)
