CVE-2026-30754CWE-787

CVE-2026-30754

High · published September 9, 2026

CVSS v3.1
8.8
EPSS
1%
Percentile
43.6
In the wild
Unconfirmed
What it is

A memory corruption vulnerability exists in FFmpeg before 8.1. The RTP encoding process. In the nal_send function in libavformat/rtpenc_h264_hevc.c, a negative size parameter (size=-3) is passed to memcpy when transmitting H.264/HEVC streams via RTP using a crafted input file. This was detected using AddressSanitizer.

The record
Technical detail
CVSS v3.1
8.8 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00524 · 43.6th percentile
Weakness
CWE-787 · Out-of-bounds Write
Published
2026-09-09T01:17Z
Affected products (1)
ProductVersionsFixed in
ffmpeg/ffmpeg< 8.18.1
References (3)
https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/20746 · [email protected]https://gist.github.com/momo-trip/4cddf2c9e15600873de55259dac6b0e6 · [email protected]https://github.com/momo-trip/poc_ffmpeg · [email protected]
EPSS history
Timeline
  • 10 SEP 03:16Z
    EPSS moved — → 0%
    epss
  • 08 SEP 00:00Z
    A memory corruption vulnerability exists in FFmpeg before 8.1
    cvelistv5