Is CVE-2015-6818 in the CISA KEV catalog?

No. CVE-2015-6818 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2015-6818?

CVE-2015-6818 has a CVSS v2 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2015-6818?

CVE-2015-6818 has an EPSS score of 2.41% (82th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2015-6818?

Upgrade ffmpeg on debian 11 to 7:2.7.2-1 or later.

CVE & CISA-KEV Catalog

CVE-2015-6818

HIGHEPSS 82th pctl

7.5

CVSS v2

NVD

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.

CWE-17

How to fix

Remediation Available

ffmpegDebian

Fixed in:7:2.7.2-1CVE-2015-6818

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v2 Vector

No CVSS vector data available.

Exploit Intelligence

2.41%probability of exploitation in 30 days

82ndpercentile

Elevated risk: more likely to be exploited than 82% of all known CVEs.

References

Other references5

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-05-06.