A memory corruption vulnerability exists in FFmpeg before 8.1.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

1. Sep 8, 2026 · NIST NVD

   Detected

   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.

2. Oct 15, 2026 · NIST NVD

   Updated

   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

• cpe ffmpeg/ffmpegversion unspecified

Sources

• CVE.orgVulnerability recordCVE-2026-30754

  Official CVE identifier

  cve.org
• NIST NVDVulnerability recordCVE-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. Th

  nvd.nist.gov

References

• Issue Tracking · code.ffmpeg.org
• Third Party Advisory · gist.github.com
• Exploit · github.com