Division by Zero Vulnerability in FFmpeg by VideoLAN
CVE-2026-125258

5.7MEDIUM

Key Information:

Vendor

Ffmpeg

Status
Ffmpeg
Vendor
CVE Published:
9 November 2026

What is CVE-2026-125258?

FFmpeg versions up to 9.0.2 are susceptible to a division by zero vulnerability within the dovi_configure_ext() function located in libavcodec/dovi_rpuenc.c. This flaw allows attackers to induce a denial of service by providing a crafted HEVC or AV1 input that has a non-zero frame rate numerator and a zero denominator. When such input is processed by the dovi_rpu bitstream filter or the libx265, libaom, or libsvtav1 encoders, it can lead to a crash in the application, disrupting video processing tasks.

Affected Version(s)

FFmpeg 0 <= 9.0.2

References

https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/25408
issue-tracking
https://github.com/FFmpeg/FFmpeg/commit/ab28d57ba2ec07b41...
patch
https://github.com/FFmpeg/FFmpeg/blob/n9.0.2/libavcodec/d...
technical-description

CVSS V4

Score:
5.7
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
High
Attack Vector:
Local
Attack Complexity:
High
Attack Required:
Physical
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Joshua Rogers (AISLE Research)
Michael Niedermayer
.