CVE-2026-125254

MEDIUM 5.5

FFmpeg through 9.0.2 Division by Zero via VVC ff_vvc_slice_rpl()

CVSS Score

5.5

EPSS Score

0.0%

EPSS Percentile

0th

FFmpeg through 9.0.2 contains a division by zero vulnerability in the VVC decoder because ff_vvc_slice_rpl() fails to validate num_ref_idx_active against built reference list entries. Attackers can supply a crafted VVC bitstream whose excess reference indices yield a zero POC difference in ff_vvc_mv_scale(), crashing the decoding process.

CWE	CWE-369
Vendor	ffmpeg
Product	ffmpeg
Published	Nov 9, 2026

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CVSS v3 Breakdown

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

Attack Vector

Local

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Affected Versions

FFmpeg / FFmpeg

0 ≤ 9.0.2

References

NVD ↗ CVE.org ↗ EPSS Data ↗

code.ffmpeg.org: https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/25572 github.com: https://github.com/FFmpeg/FFmpeg/commit/8732d7585cd8ab9d1dd9baeb4db5e93466c0efa7 github.com: https://github.com/FFmpeg/FFmpeg/blob/n9.0.2/libavcodec/vvc/mvs.c#L77 github.com: https://github.com/FFmpeg/FFmpeg vulncheck.com: https://www.vulncheck.com/advisories/ffmpeg-through-9.0.2-division-by-zero-via-vvc-ff-vvc-slice-rpl

Credits

Joshua Rogers (AISLE Research) Michael Niedermayer