MuPDF through 1.18.1 has an out-of-bounds write because the cached color converter does not properly consider the maximum key size of a hash table. This can, for example, be seen with crafted "mutool draw" input.
| Software | From | Fixed in |
|---|---|---|
| artifex / mupdf | - | 1.18.1.x |
| fedoraproject / fedora | 34 | 34.x |