{"schemaVersion":3,"id":"CVE-2026-32739","aliases":["ALPINE-CVE-2026-32739","UBUNTU-CVE-2026-32739","DEBIAN-CVE-2026-32739"],"status":"published","duplicateOf":null,"title":null,"description":"libheif is a HEIF and AVIF file format decoder and encoder. In versions 1.21.2 and below, a crafted 800-byte HEIF sequence file causes an infinite loop in Box_stts::get_sample_duration(), consuming 100% CPU indefinitely with zero progress, leading to DoS. The loop has no iteration limit or timeout and is triggered during file open (parsing) - before any user interaction or image decoding. The process stays alive (no crash, no error logged), making it invisible to crash-based monitoring. 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