There is an out-of-bounds read in fzrunt3_glyph in fitz/font.c in Artifex MuPDF 1.14.0, as demonstrated by mutool.
{ "binaries": [ { "binary_name": "libmupdf-dev", "binary_version": "1.12.0+ds1-1ubuntu0.1~esm1" }, { "binary_name": "mupdf", "binary_version": "1.12.0+ds1-1ubuntu0.1~esm1" }, { "binary_name": "mupdf-tools", "binary_version": "1.12.0+ds1-1ubuntu0.1~esm1" } ] }