CVE-2026-30754

High severity, CVSS 8.8. EPSS: 0.5% chance of exploitation in the next 30 days.

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 2026-09-08. Last modified 2026-09-09.