CVE-2015-6818

Name: CVE-2015-6818
Creator: NVD / NIST
Published: 2015-09-06T02:59:00.08+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 2.41%

Last modified Jun 17, 2026

CVE-2015-6818 is a vulnerability of currently unknown severity. 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.. EPSS estimates a 2.41% chance of exploitation in the next 30 days.

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.

Metrics

EPSS Probability

2.41%

82.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-17

Affected Software

Vendor	Product	Versions
Ffmpeg	Ffmpeg	<= 2.7.1
Canonical	Ubuntu Linux	12.04

References

Timeline

Published: Sep 6, 2015
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2015-6818?

How severe is CVE-2015-6818?

Severity scoring for CVE-2015-6818 is pending analysis. The EPSS model estimates a 2.41% probability of exploitation in the next 30 days.

How do I fix CVE-2015-6818?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2015-6818?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST