CVE-2026-30754
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.
- Published Sep 8, 2026
- CVSS 8.8 high
- 0.5% chance of exploitation in the next 30 days (EPSS)
- A fix is available