Out-of-bounds Read Affecting ffmpeg-7 package, versions <7.1.5-r3


Severity

Recommended
0.0
high
0
10

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Threat Intelligence

EPSS
0.12% (2nd percentile)

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  • Snyk IDSNYK-CHAINGUARDLATEST-FFMPEG7-20361542
  • published1 Oct 2026
  • disclosed19 Aug 2026

Introduced: 19 Aug 2026

CVE-2026-75147  (opens in a new tab)
CWE-125  (opens in a new tab)

How to fix?

Upgrade Chainguard ffmpeg-7 to version 7.1.5-r3 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream ffmpeg-7 package and not the ffmpeg-7 package as distributed by Chainguard. See How to fix? for Chainguard relevant fixed versions and status.

FFmpeg before commit 983dae9 contains an out-of-bounds read in the AV1 RTP packetizer (libavformat/rtpenc_av1.c). The keyframe detection loop that searches for a sequence header OBU advanced its pointer and remaining-size counter by the encoded header length plus the OBU payload size without first bounding the OBU size against the remaining data. A crafted OBU size causes the remaining-size counter to wrap to a positive value, causing the next loop iteration to dereference a pointer beyond the end of the packet buffer. A crafted AV1 input packet muxed to RTP triggers the out-of-bounds read.

CVSS Base Scores

version 3.1