CVE-2026-50142

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{"affected": [{"affectedData": [{"product": "libheif", "vendor": "strukturag", "versions": [{"status": "affected", "version": ">= 1.19.0, < 1.23.0"}]}], "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 1.23.0, a crafted HEIF sequence accepted by heif_context_read_from_memory() with the msf1 sequence brand can cause unbounded heap allocation. In libheif/sequences/seq_boxes.cc, Box_stsz::parse() applies max_sequence_frames only to variable-size samples, so fixed-size mode accepts an attacker-controlled sample_count without a bound. In libheif/sequences/track.cc, Track::load() also adds current_sample_idx and samples_per_chunk in 32-bit arithmetic, allowing the consistency check to be bypassed by wraparound. The resulting values reach the Chunk::Chunk() allocation path, which can consume gigabytes of memory and crash or stall the process through memory exhaustion. This issue is fixed in version 1.23.0."}, {"lang": "es", "value": "libheif es un decodificador y codificador de formato de archivo HEIF y AVIF. Desde la 1.19.0 hasta la 1.23.0, una secuencia HEIF manipulada aceptada por heif_context_read_from_memory() con la marca de secuencia msf1 puede causar una asignaci\u00f3n de memoria din\u00e1mica (heap) ilimitada. En libheif/sequences/seq_boxes.cc, Box_stsz::parse() aplica max_sequence_frames solo a muestras de tama\u00f1o variable, por lo que el modo de tama\u00f1o fijo acepta un sample_count controlado por el atacante sin un l\u00edmite. En libheif/sequences/track.cc, Track::load() tambi\u00e9n suma current_sample_idx y samples_per_chunk en aritm\u00e9tica de 32 bits, permitiendo que la verificaci\u00f3n de consistencia sea eludida por desbordamiento. Los valores resultantes alcanzan la ruta de asignaci\u00f3n de Chunk::Chunk(), lo que puede consumir gigabytes de memoria y bloquear o paralizar el proceso por agotamiento de memoria. Este problema est\u00e1 solucionado en la versi\u00f3n 1.23.0."}], "id": "CVE-2026-50142", "lastModified": "2026-10-22T17:09:59.477", "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"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-50142", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-08-19T18:51:41.872528Z", "version": "2.0.3"}}]}, "published": "2026-08-18T22:16:52.633", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/strukturag/libheif/commit/a6caa38f7a70d66dc9caec2a7bfe20935b32c622"}, {"source": "security-advisories@github.com", "url": "https://github.com/strukturag/libheif/releases/tag/v1.23.0"}, {"source": "security-advisories@github.com", "url": "https://github.com/strukturag/libheif/security/advisories/GHSA-jvmp-j3cw-84mh"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-190"}, {"lang": "en", "value": "CWE-770"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[1.19.0,1.23.0)"}}], "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": "2026-08-19T00:00:04.761238+00:00", "updated": "2026-08-21T21:00:03.280448+00:00", "vendors": ["struktur", "struktur$PRODUCT$libheif"]}