CVE-2026-39919: fix heap buffer overflow in the JPEG 2000 output adapter when
components are subsampled below 8 bits per sample
CVE-2026-103226: bound the control stack in the Type 1 to Type 2 font
conversion used by pdfwrite
CVE-2025-27830: count every $Blend procedure entry in the length and bound
the formatting of its numbers so the serialized procedure cannot overflow
its buffer (upstream Bug 706923 and gs_snprintf)