CVE-2026-30754

Summary

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.

Affected Software

Weaknesses

• n/a

References

• https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/20746
• https://github.com/momo-trip/poc_ffmpeg
• https://gist.github.com/momo-trip/4cddf2c9e15600873de55259dac6b0e6

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