{"id":"CVE-2026-84447","aliases":["GHSA-x8xm-cm2c-cfc8"],"url":"https://o3.security/vulnerability/CVE-2026-84447","summary":"libheif: Derived-image indirect reference chains and tiled offsets bypass decode caching and MemoryHandle limits, causing CPU/memory amplification DoS","details":"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.","published":"2026-09-18T16:00:51.589Z","modified":"2026-09-19T03:47:22.001865906Z","cvss":{"score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[],"fix":{"url":"https://github.com/strukturag/libheif/commit/30b52a4e829efe0ee6d7208e8500b99f664af5e9","label":"strukturag/libheif@30b52a4"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/84xxx/CVE-2026-84447.json"},{"type":"FIX","url":"https://github.com/strukturag/libheif/commit/30b52a4e829efe0ee6d7208e8500b99f664af5e9"},{"type":"WEB","url":"https://github.com/strukturag/libheif/releases/tag/v1.23.2"},{"type":"ADVISORY","url":"https://github.com/strukturag/libheif/security/advisories/GHSA-x8xm-cm2c-cfc8"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-84447"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-09-19T03:47:22.001865906Z"}}