CVE-2026-84447 [HIGH] – libheif is a HEIF and AVIF file format decoder and encoder. In 1.23.1 and earlier, crafted

libheif is a HEIF and AVIF file format decoder and encoder. In 1.23.1 and earlier, crafted grid, iovl, and iden reference graphs can repeatedly decode the same base image because processed_ids is copied per branch and ImageItem::decode_image() has no shared operation budget. This vulnerability is fixed in 1.23.2.