{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-84451", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-09-01T20:05:09.423Z", "datePublished": "2026-09-18T16:02:22.529Z", "dateUpdated": "2026-09-18T16:02:22.529Z"}, "containers": {"cna": {"title": "libheif: Incomplete fix for CVE-2026-62292 leaves libheif vulnerable to an out-of-bounds read", "problemTypes": [{"descriptions": [{"cweId": "CWE-125", "lang": "en", "description": "CWE-125: Out-of-bounds Read", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 6.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H", "version": "3.1"}}], "references": [{"name": "https://github.com/strukturag/libheif/security/advisories/GHSA-hh47-fhqr-cj2r", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/strukturag/libheif/security/advisories/GHSA-hh47-fhqr-cj2r"}, {"name": "https://github.com/strukturag/libheif/commit/8bfed9a9ed008e4ef28abc736284a90d3cba754f", "tags": ["x_refsource_MISC"], "url": "https://github.com/strukturag/libheif/commit/8bfed9a9ed008e4ef28abc736284a90d3cba754f"}, {"name": "https://github.com/strukturag/libheif/releases/tag/v1.23.3", "tags": ["x_refsource_MISC"], "url": "https://github.com/strukturag/libheif/releases/tag/v1.23.3"}], "affected": [{"vendor": "strukturag", "product": "libheif", "versions": [{"version": ">= 1.19.0, < 1.23.3", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-09-18T16:02:22.529Z"}, "descriptions": [{"lang": "en", "value": "libheif is a HEIF and AVIF file format decoder and encoder. From 1.19.0 until 1.23.3, the no-icef full-item branch of unc_decoder::get_compressed_image_data_uncompressed() in libheif/codecs/uncompressed/unc_decoder.cc retains an addition-based range check that can wrap when a crafted uncompressed tile grid produces a large range_start_offset and range_size. The overflow makes the bounds comparison pass and allows heif_image_handle_decode_image_tile() to call memcpy() with an invalid source pointer and a very large length when decoding a valid high-index advertised tile. This incomplete remediation of CVE-2026-62292 can reliably crash tile-processing applications, while whole-image decoding is not claimed to reach the demonstrated path. This issue is fixed in version 1.23.3."}], "source": {"advisory": "GHSA-hh47-fhqr-cj2r", "discovery": "UNKNOWN"}}}}

{}

{"affected": [{"affectedData": [{"product": "libheif", "vendor": "strukturag", "versions": [{"status": "affected", "version": ">= 1.19.0, < 1.23.3"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "libheif is a HEIF and AVIF file format decoder and encoder. From 1.19.0 until 1.23.3, the no-icef full-item branch of unc_decoder::get_compressed_image_data_uncompressed() in libheif/codecs/uncompressed/unc_decoder.cc retains an addition-based range check that can wrap when a crafted uncompressed tile grid produces a large range_start_offset and range_size. The overflow makes the bounds comparison pass and allows heif_image_handle_decode_image_tile() to call memcpy() with an invalid source pointer and a very large length when decoding a valid high-index advertised tile. This incomplete remediation of CVE-2026-62292 can reliably crash tile-processing applications, while whole-image decoding is not claimed to reach the demonstrated path. This issue is fixed in version 1.23.3."}], "id": "CVE-2026-84451", "lastModified": "2026-09-18T16:17:13.640", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 6.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 3.6, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2026-09-18T16:17:13.320", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/strukturag/libheif/commit/8bfed9a9ed008e4ef28abc736284a90d3cba754f"}, {"source": "security-advisories@github.com", "url": "https://github.com/strukturag/libheif/releases/tag/v1.23.3"}, {"source": "security-advisories@github.com", "url": "https://github.com/strukturag/libheif/security/advisories/GHSA-hh47-fhqr-cj2r"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-125"}], "source": "security-advisories@github.com", "type": "Primary"}]}

{}

{}