{"cve":"CVE-2015-6818","nvd":{"published":"2015-09-06T02:59:00.080","modified":"2026-06-17T00:31:28.300","status":"Modified","description":"The decode_ihdr_chunk function in libavcodec/pngdec.c in FFmpeg before 2.7.2 does not enforce uniqueness of the IHDR (aka image header) chunk in a PNG image, which allows remote attackers to cause a denial of service (out-of-bounds array access) or possibly have unspecified other impact via a crafted image with two or more of these chunks.","cvss_v4":null,"cvss_v3":null,"cwes":["CWE-17"],"references":["http://ffmpeg.org/security.html","http://git.videolan.org/?p=ffmpeg.git%3Ba=commit%3Bh=47f4e2d8960ca756ca153ab8e3e93d80449b8c91","http://www.securitytracker.com/id/1033483","http://www.ubuntu.com/usn/USN-2944-1","https://lists.debian.org/debian-lts-announce/2018/12/msg00009.html"],"products":["canonical:ubuntu_linux","ffmpeg:ffmpeg"],"source":"nvd","synced_at":"2026-10-19T20:37:45.466985407+00:00"},"epss":{"cve":"CVE-2015-6818","score":0.02412,"percentile":0.84119,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}