CVE-2026-30754
highA memory corruption vulnerability exists in FFmpeg before 8.1.
Vendor / product: Ffmpeg — ffmpeg
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.
CVSS
8.8
8.8 (CVSS v3.1)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Severity source: NVD CVSS v3.1 (134c704f-9b21-4f2e-91b3-4a467353bcc0)
Timeline (UTC)
Published: 2026-09-08 21:17
Modified: 2026-10-15 19:25
NVD status: Analyzed
Last synced 1 day ago
Verified against the source API 2026-10-27 06:52 UTC
Exploitation
Not listed in CISA KEV (as of last catalog sync)
Absence from KEV does not mean a CVE is not exploited. Exploitation status: unknown (no authoritative evidence in our sources).
Affected products
ffmpeg / ffmpeg <8.1
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
Patch / mitigation: https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/20746
References
- https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/20746 cve@mitre.org
- https://gist.github.com/momo-trip/4cddf2c9e15600873de55259dac6b0e6 cve@mitre.org
- https://github.com/momo-trip/poc_ffmpeg cve@mitre.org
Data sources
NVD CVE API 2.0 — fetched 2026-10-27 06:52 UTC · record ↗