CVE-2026-84444

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{"affected": [{"affectedData": [{"product": "libheif", "vendor": "strukturag", "versions": [{"status": "affected", "version": "< 1.23.2"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "libheif is a HEIF and AVIF file format decoder and encoder. Prior to 1.23.2, when WITH_UNCOMPRESSED_CODEC is enabled, heif_context_add_image_tile() accepts an independently constructed tile whose component-plane dimensions do not match the tile geometry established by the prototype image. ImageItem_uncompressed::add_image_tile() passes that tile directly to unc_encoder::encode_tile(), which lacked the check_component_sizes() gate and sizes its output from the configured tile geometry while copying the tile's actual component-plane dimensions. An oversized component plane can therefore make unc_encoder_component_interleave::encode_tile() copy attacker-controlled data beyond the heap output buffer. This issue is fixed in version 1.23.2."}], "id": "CVE-2026-84444", "lastModified": "2026-09-22T15:17:19.093", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.4, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 2.2, "impactScore": 5.2, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-84444", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-09-22T14:50:07.797725Z", "version": "2.0.3"}}]}, "published": "2026-09-18T16:17:12.357", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/strukturag/libheif/commit/e65071f59a1ac08aa1eb0d07a831deaf6bb4d03b"}, {"source": "security-advisories@github.com", "url": "https://github.com/strukturag/libheif/releases/tag/v1.23.2"}, {"source": "security-advisories@github.com", "url": "https://github.com/strukturag/libheif/security/advisories/GHSA-j264-xvrp-5v7q"}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "url": "https://github.com/strukturag/libheif/security/advisories/GHSA-j264-xvrp-5v7q"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-787"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,1.23.2)"}}], "enrichment": {"confidence": 94.0, "confidence_source": "matching", "scores": [{"score": 94.0, "source": "matching"}]}, "original": {"product": "libheif", "source": "cna", "vendor": "strukturag"}, "product": "libheif", "vendor": "struktur"}], "created": "2026-09-18T22:30:15.633948+00:00", "updated": "2026-09-19T22:15:05.230087+00:00", "vendors": ["struktur", "struktur$PRODUCT$libheif"]}