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{"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"}