{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-84446", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-09-01T20:05:09.422Z", "datePublished": "2026-09-18T15:54:48.945Z", "dateUpdated": "2026-09-18T15:54:48.945Z"}, "containers": {"cna": {"title": "libheif: Sequence decode timing-table initialization allows non-terminating loops and unbounded memory, bypassing max_sequence_frames", "problemTypes": [{"descriptions": [{"cweId": "CWE-835", "lang": "en", "description": "CWE-835: Loop with Unreachable Exit Condition ('Infinite Loop')", "type": "CWE"}]}], "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"}}], "references": [{"name": "https://github.com/strukturag/libheif/security/advisories/GHSA-xw34-mjcp-jqh8", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/strukturag/libheif/security/advisories/GHSA-xw34-mjcp-jqh8"}, {"name": "https://github.com/strukturag/libheif/commit/3a7a69ae325f652e48c026b8241ab25bedf44d9b", "tags": ["x_refsource_MISC"], "url": "https://github.com/strukturag/libheif/commit/3a7a69ae325f652e48c026b8241ab25bedf44d9b"}, {"name": "https://github.com/strukturag/libheif/releases/tag/v1.23.2", "tags": ["x_refsource_MISC"], "url": "https://github.com/strukturag/libheif/releases/tag/v1.23.2"}], "affected": [{"vendor": "strukturag", "product": "libheif", "versions": [{"version": "< 1.23.2", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-09-18T15:54:48.945Z"}, "descriptions": [{"lang": "en", "value": "libheif is a HEIF and AVIF file format decoder and encoder. Prior to 1.23.2, crafted HEIF sequence timing and edit-list data can make Track::init_sample_timing_table() compute a logical m_num_output_samples value that exceeds the uint32_t counters used by Track_Visual::decode_next_image_sample() and Track::get_next_sample_raw_data(). The resulting comparison can never reach the oversized output count, causing non-terminating decode or raw-sample loops and bypassing max_sequence_frames. The same sequence path repeatedly calls Box_stts::get_sample_duration() and allocates Chunk::m_sample_ranges and Track::m_presentation_timeline outside MemoryHandle accounting, allowing severe CPU and memory exhaustion from a small file. This issue is fixed in version 1.23.2."}], "source": {"advisory": "GHSA-xw34-mjcp-jqh8", "discovery": "UNKNOWN"}}}}

{}

{"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, crafted HEIF sequence timing and edit-list data can make Track::init_sample_timing_table() compute a logical m_num_output_samples value that exceeds the uint32_t counters used by Track_Visual::decode_next_image_sample() and Track::get_next_sample_raw_data(). The resulting comparison can never reach the oversized output count, causing non-terminating decode or raw-sample loops and bypassing max_sequence_frames. The same sequence path repeatedly calls Box_stts::get_sample_duration() and allocates Chunk::m_sample_ranges and Track::m_presentation_timeline outside MemoryHandle accounting, allowing severe CPU and memory exhaustion from a small file. This issue is fixed in version 1.23.2."}], "id": "CVE-2026-84446", "lastModified": "2026-09-18T16:17:12.640", "metrics": {"cvssMetricV31": [{"cvssData": {"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"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2026-09-18T16:17:12.513", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/strukturag/libheif/commit/3a7a69ae325f652e48c026b8241ab25bedf44d9b"}, {"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-xw34-mjcp-jqh8"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-835"}], "source": "security-advisories@github.com", "type": "Primary"}]}

{}

{}