CVE-2026-59679

CVE-2026-59679 affects the libXfont2 font-server client (X.Org X11). The function fs_read_glyphs() in src/fc/fserve.c indexes the encoding[] array using num_chars from the FS_QueryXBitmaps16 reply, but that array was allocated based on num_extents from the separate FS_QueryXExtents16 reply—two fi...