Buffer overflow in N/a

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.

Vulnerability class: Buffer Overflow

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

Affected products

  • N/a

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-30754?
CVE-2026-30754 is a high-severity vulnerability in N/a, classified under Out-of-bounds Write. CVSS score: 8.8/10. Published 2026-09-08.
How severe is CVE-2026-30754?
High severity. CVSS v3 base score is 8.8 out of 10.