CVE-2026-84444

{"id": "CVE-2026-84444", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-84444", "role": "CISA Coordinator", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-09-22T14:50:07.797725Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.4, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "HIGH", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 5.2, "exploitabilityScore": 2.2}]}, "affected": [{"source": "security-advisories@github.com", "affectedData": [{"vendor": "strukturag", "product": "libheif", "versions": [{"status": "affected", "version": "< 1.23.2"}]}]}], "published": "2026-09-18T16:17:12.357", "references": [{"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": "security-advisories@github.com"}, {"url": "https://github.com/strukturag/libheif/security/advisories/GHSA-j264-xvrp-5v7q", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"}], "vulnStatus": "Deferred", "weaknesses": [{"type": "Secondary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-787"}]}], "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."}], "lastModified": "2026-09-22T15:17:19.093", "sourceIdentifier": "security-advisories@github.com"}