CVE-2026-49271

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{"affected": [{"affectedData": [{"product": "libheif", "vendor": "strukturag", "versions": [{"status": "affected", "version": "< 1.22.1"}]}], "source": "security-advisories@github.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:struktur:libheif:*:*:*:*:*:*:*:*", "matchCriteriaId": "9F3B7B77-FD41-45AE-BC05-FF850198DAC1", "versionEndExcluding": "1.22.1", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "libheif is a HEIF and AVIF file format decoder and encoder. Prior to version 1.22.1, the uncompressed HEIF decoder validates explicit icef compressed-unit offsets using unit_offset + unit_size. Because the addition can wrap, a crafted HEIF file can pass the range check and then construct a vector from iterators outside the compressed item buffer, producing an out-of-bounds heap read and crash. Version 1.22.1 patches the issue."}, {"lang": "es", "value": "libheif es un decodificador y codificador de formato de archivo HEIF y AVIF. Antes de la versi\u00f3n 1.22.1, el decodificador HEIF sin comprimir valida los desplazamientos expl\u00edcitos de unidades comprimidas icef utilizando unit_offset + unit_size. Debido a que la adici\u00f3n puede desbordarse, un archivo HEIF manipulado puede pasar la verificaci\u00f3n de rango y luego construir un vector a partir de iteradores fuera del b\u00fafer de elementos comprimidos, produciendo una lectura fuera de l\u00edmites en el heap y un fallo. La versi\u00f3n 1.22.1 corrige el problema."}], "id": "CVE-2026-49271", "lastModified": "2026-10-25T23:10:00.167", "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"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-49271", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-06-22T17:01:07.409364Z", "version": "2.0.3"}}]}, "published": "2026-06-19T18:16:19.353", "references": [{"source": "security-advisories@github.com", "tags": ["Mitigation", "Vendor Advisory"], "url": "https://github.com/strukturag/libheif/security/advisories/GHSA-r7qj-cg5r-r6vf"}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "tags": ["Mitigation", "Vendor Advisory"], "url": "https://github.com/strukturag/libheif/security/advisories/GHSA-r7qj-cg5r-r6vf"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-125"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{"bugzilla": {"description": "libheif: libheif: Denial of Service via crafted HEIF file due to integer wrap-around", "id": "2490846", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2490846"}, "csaw": false, "cvss3": {"cvss3_base_score": "6.5", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-190", "details": ["libheif is a HEIF and AVIF file format decoder and encoder. Prior to version 1.22.1, the uncompressed HEIF decoder validates explicit icef compressed-unit offsets using unit_offset + unit_size. Because the addition can wrap, a crafted HEIF file can pass the range check and then construct a vector from iterators outside the compressed item buffer, producing an out-of-bounds heap read and crash. Version 1.22.1 patches the issue.", "A flaw was found in libheif, a decoder and encoder for HEIF and AVIF file formats. A remote attacker could exploit this vulnerability by providing a specially crafted HEIF file. The uncompressed HEIF decoder's validation of `icef` compressed-unit offsets can experience an integer wrap-around. This allows the attacker to cause an out-of-bounds heap read, leading to a crash and resulting in a Denial of Service (DoS) for the application using libheif."], "mitigation": {"lang": "en:us", "value": "Configure the service to automatically restart on failure to maintain uptime if an exploit triggers a crash."}, "name": "CVE-2026-49271", "public_date": "2026-06-19T17:16:20Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-49271\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-49271\nhttps://github.com/strukturag/libheif/security/advisories/GHSA-r7qj-cg5r-r6vf"], "statement": "Moderate: This flaw in libheif, which could lead to a denial of service through a crafted HEIF file, does not affect Red Hat products. The vulnerable code responsible for the integer wrap-around in the uncompressed HEIF decoder is not present in Red Hat's supported versions of libheif.", "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,1.22.1)"}}], "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": "2026-06-19T20:00:11.992268+00:00", "updated": "2026-06-30T14:00:06.136118+00:00", "vendors": ["struktur", "struktur$PRODUCT$libheif"]}