Two buffer overflows have been found in the GIF image parsing code of Tk, a cross-platform graphical toolkit, which could lead to the execution of arbitrary code. The Common Vulnerabilities and Exposures project identifies the following problems: It was discovered that libtk-img is prone to a buffer overflow via specially crafted multi-frame interlaced GIF files. It was discovered that libtk-img is prone to a buffer overflow via specially crafted GIF files with certain subimage sizes.