CVE-2026-125187

MediumCVSS 5.5/10Last modified Nov 10, 2026

Description

FFmpeg through 9.0.2 contains a reachable assertion vulnerability in the TTA encoder's tta_encode_frame() in libavcodec/ttaenc.c, which never reserves output packet space for the 4-byte CRC. Attackers can supply audio whose sample values and length produce a small, poorly compressible final frame, triggering the av_assert0() in flush_put_bits() and aborting applications transcoding to TTA.

Metrics

CVSS 3.1 5.5/10CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-617

Affected software

Source: the vendor's advisory (CNA). NVD analysis pending.

Vendor	Product	Versions
FFmpeg	FFmpeg	<= 9.0.2

References

Timeline

Published: Nov 9, 2026
Last modified: Nov 10, 2026
NVD status: Undergoing Analysis

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