CVE-2026-38349

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Integer Overflow in FFmpeg Leading to DoS

Publication date: 2026-08-28

Last updated on: 2026-09-09

Assigner: MITRE

Description

An integer overflow in the hScale16To19_c() function (libswscale/output.c) of FFmpeg N-122528-gdd2976b9e1 allows attackers to cause a Denial of Service (DoS) via supplying a crafted image file.

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-08-28

Last Modified

2026-09-09

Generated

2026-09-17

AI Q&A

2026-08-28

EPSS Evaluated

2026-09-15

NVD

CVE-2026-38349

EUVD

EUVD-2026-67321

Affected Vendors & Products

Vendor	Product	Version / Range
ffmpeg	ffmpeg	*

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-190	The product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.

Attack-Flow Graph

Executive Summary

This vulnerability is an integer overflow in the hScale16To19_c() function within FFmpeg's libswscale/output.c file. It occurs when processing a crafted image file, potentially leading to a Denial of Service (DoS) condition.

Detection Guidance

This vulnerability involves an integer overflow in FFmpeg's hScale16To19_c() function. To detect it, monitor for crashes or hangs when processing image files with FFmpeg. Use FFmpeg commands to test suspicious files, such as 'ffmpeg -i input.jpg output.mp4' and observe for errors. Check system logs for segmentation faults or memory errors during media processing.

Impact Analysis

The vulnerability allows attackers to cause a system crash or unresponsiveness by exploiting the integer overflow, resulting in a DoS. This could disrupt services relying on FFmpeg for media processing.

Compliance Impact

This vulnerability does not directly affect compliance with GDPR, HIPAA, or similar standards as it is a Denial of Service issue in FFmpeg's image processing function. Compliance impacts would depend on system use and data exposure, not the vulnerability itself.

Mitigation Strategies

Update FFmpeg to the latest stable version to patch the integer overflow in hScale16To19_c(). Avoid processing untrusted image files until patched.

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