Out-of-bounds Write Affecting ffmpeg package, versions *


Severity

Recommended
0.0
high
0
10

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

Social Trends
EPSS
0.31% (24th percentile)

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  • Snyk IDSNYK-RHEL10-FFMPEG-18513472
  • published4 Aug 2026
  • disclosed24 Jul 2026

Introduced: 24 Jul 2026

NewCVE-2026-66039  (opens in a new tab)
CWE-787  (opens in a new tab)

How to fix?

There is no fixed version for RHEL:10 ffmpeg.

NVD Description

Note: Versions mentioned in the description apply only to the upstream ffmpeg package and not the ffmpeg package as distributed by RHEL. See How to fix? for RHEL:10 relevant fixed versions and status.

FFmpeg through 8.1.2, fixed in commit aafb5c6, contains a signed integer overflow vulnerability in the MACE6 audio decoder that allows attackers to corrupt heap memory by supplying a crafted CAF file with a malicious bytes_per_packet value. Attackers can craft a CAF file with oversized bytes_per_packet and frames_per_packet values in the desc chunk to trigger an integer overflow in mace_decode_frame() during output sample count computation, resulting in an undersized buffer allocation and heap out-of-bounds write that could enable code execution.

CVSS Base Scores

version 3.1