{"schemaVersion":3,"id":"CVE-2026-84447","aliases":["UBUNTU-CVE-2026-84447","DEBIAN-CVE-2026-84447"],"status":"published","duplicateOf":null,"title":null,"description":"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. 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