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{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "modules": ["libavformat"], "product": "FFmpeg", "programFiles": ["libavformat/mov.c"], "repo": "https://github.com/FFmpeg/FFmpeg", "vendor": "FFmpeg", "versions": [{"lessThan": "9.0", "status": "affected", "version": "0", "versionType": "custom"}]}], "source": "cve@mitre.org"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "FFmpeg before 9.0 has a signed integer overflow in libavformat/mov.c. In mov_read_ispe(), uint32_t width/height values from a crafted HEIF ispe box are stored into signed int fields without bounds checking, allowing values exceeding INT_MAX to become negative. In read_image_grid(), accumulating these values causes signed integer overflow (undefined behavior per C17 section 6.5), which on x86 wraps to a small positive value, bypassing downstream validity checks."}], "id": "CVE-2026-96611", "lastModified": "2026-09-23T15:17:34.160", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "LOCAL", "availabilityImpact": "LOW", "baseScore": 6.9, "baseSeverity": "MEDIUM", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L", "version": "3.1"}, "exploitabilityScore": 1.4, "impactScore": 5.5, "source": "cve@mitre.org", "type": "Secondary"}]}, "published": "2026-09-23T15:17:34.160", "references": [{"source": "cve@mitre.org", "url": "https://code.ffmpeg.org/FFmpeg/FFmpeg/commit/059eb2e853c1f62b8df1b73be9318061a7a21b0b"}, {"source": "cve@mitre.org", "url": "https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/23455"}], "sourceIdentifier": "cve@mitre.org", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-190"}], "source": "cve@mitre.org", "type": "Primary"}]}

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