{"id":"CVE-2026-30754","aliases":[],"url":"https://o3.security/vulnerability/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)…","details":"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":"2026-09-08T21:17:06.990","modified":"2026-09-09T16:17:02.720","cvss":{"score":8.8,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"},"epss":{"score":0.00166,"percentile":0.06132,"asOf":"2026-09-09"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[],"fix":null,"references":[{"type":"WEB","url":"https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/20746"},{"type":"WEB","url":"https://gist.github.com/momo-trip/4cddf2c9e15600873de55259dac6b0e6"},{"type":"WEB","url":"https://github.com/momo-trip/poc_ffmpeg"}],"provenance":{"sources":["OSV.dev","NVD","FIRST.org (EPSS)"],"lastVerified":"2026-09-09T16:17:02.720"}}