CVE-2026-52295

FFmpeg before 9.0 has an out-of-bounds read because the copied extradata lacked required padding before GetBitContext-based access in libavformat/iamf_writer.c.

CVSS 3.1

2.9CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L

EPSS

0.2% chance of exploitation in the next 30 days; higher than 7% of CVEs (scores of 2026-10-25)

CWEs

CWE-125, CWE-120

Published

2026-09-01

Modified

2026-10-14

Record from

the NVD, synced 2026-10-19

Affected

• ffmpeg:ffmpeg

References

• https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/22988
• https://git.ffmpeg.org/gitweb/ffmpeg.git/commit/8439e0203744a30d280668fcd086f74ed5001da1
• https://github.com/Kenan-Kamel/VulnerabilitiesReference/tree/main/FFmpeg/ExtradataPadding

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