CVE-2026-30754
Published:September 08, 2026
Updated:September 22, 2026
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 Packages
https://github.com/FFmpeg/FFmpeg.git (GITHUB):
Affected version(s) >=n4.4-dev <n4.4.7Fix Suggestion:
Update to version n4.4.7https://github.com/FFmpeg/FFmpeg.git (GITHUB):
Affected version(s) >=n5.1-dev <n5.1.8Fix Suggestion:
Update to version n5.1.8https://github.com/FFmpeg/FFmpeg.git (GITHUB):
Affected version(s) >=n6.1-dev <n6.1.4Fix Suggestion:
Update to version n6.1.4https://github.com/FFmpeg/FFmpeg.git (GITHUB):
Affected version(s) =n8.1-dev <n8.1Fix Suggestion:
Update to version n8.1https://github.com/FFmpeg/FFmpeg.git (GITHUB):
Affected version(s) >=n7.1-dev <n7.1.3Fix Suggestion:
Update to version n7.1.3https://github.com/FFmpeg/FFmpeg.git (GITHUB):
Affected version(s) >=n7.2-dev <n8.0.1Fix Suggestion:
Update to version n8.0.1Related Resources (4)
Do you need more information?
Contact UsCVSS v4
Base Score:
8.7
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
PASSIVE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
HIGH
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
8.8
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Weakness Type (CWE)
Out-of-bounds Write
EPSS
Base Score:
0.35