{"id":"CVE-2026-84447","state":"PUBLISHED","title":"libheif: Derived-image indirect reference chains and tiled offsets bypass decode caching and MemoryHandle limits, causing CPU/memory amplification DoS","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. This vulnerability is fixed in 1.23.2.","publishedAt":"2026-09-18T16:00:51.589Z","updatedAt":"2026-09-18T17:29:58.718Z","severity":{"score":7.5,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","source":"GitHub_M"},"assigner":"GitHub_M","products":["strukturag libheif"],"affected":[{"vendor":"strukturag","product":"libheif","versions":[{"version":"< 1.23.2","status":"affected"}]}],"references":["https://github.com/strukturag/libheif/security/advisories/GHSA-x8xm-cm2c-cfc8","https://github.com/strukturag/libheif/commit/30b52a4e829efe0ee6d7208e8500b99f664af5e9","https://github.com/strukturag/libheif/releases/tag/v1.23.2"],"weaknesses":["CWE-770"],"ingestedAt":"2026-10-29T20:13:15.269Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/84xxx/CVE-2026-84447.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-84447","state":"PUBLISHED","datePublished":"2026-09-18T16:00:51.589Z","dateUpdated":"2026-09-18T17:29:58.718Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-09-01T20:05:09.422Z"},"containers":{"cna":{"title":"libheif: Derived-image indirect reference chains and tiled offsets bypass decode caching and MemoryHandle limits, causing CPU/memory amplification DoS","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"strukturag","product":"libheif","versions":[{"version":"< 1.23.2","status":"affected"}]}],"references":[{"url":"https://github.com/strukturag/libheif/security/advisories/GHSA-x8xm-cm2c-cfc8","name":"https://github.com/strukturag/libheif/security/advisories/GHSA-x8xm-cm2c-cfc8","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/strukturag/libheif/commit/30b52a4e829efe0ee6d7208e8500b99f664af5e9","name":"https://github.com/strukturag/libheif/commit/30b52a4e829efe0ee6d7208e8500b99f664af5e9","tags":["x_refsource_MISC"]},{"url":"https://github.com/strukturag/libheif/releases/tag/v1.23.2","name":"https://github.com/strukturag/libheif/releases/tag/v1.23.2","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":7.5,"baseSeverity":"HIGH","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-770","lang":"en","description":"CWE-770: Allocation of Resources Without Limits or Throttling","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-09-18T16:00:51.589Z"},"source":{"advisory":"GHSA-x8xm-cm2c-cfc8","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","references":[{"url":"https://github.com/strukturag/libheif/security/advisories/GHSA-x8xm-cm2c-cfc8","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-09-18T17:29:29.218555Z","id":"CVE-2026-84447","options":[{"Exploitation":"poc"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-09-18T17:29:58.718Z"}}]}}}