NULL pointer dereference in FFmpeg - CVE-2023-6603
Published: October 27, 2025
Vulnerability identifier: #VU117662
CSH Severity: Low
CVSS v4: 4.6 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2023-6603
CWE-ID: CWE-476
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to a NULL pointer dereference error when parsing HLS playlists. A remote attacker can pass specially crafted HLS playlist to the application and crash the application.
Affected software
FFmpeg
Ubuntu
ffmpeg (Ubuntu package)
Ubuntu
ffmpeg (Ubuntu package)
How to mitigate CVE-2023-6603
Install update from vendor's website.
ffmpeg (Ubuntu package) - addressed in versions 7:2.8.17-0ubuntu0.1+esm13, 7:3.4.11-0ubuntu0.1+esm11, 7:4.2.7-0ubuntu0.1+esm11, 7:4.4.2-0ubuntu0.22.04.1+esm10, 7:6.1.1-3ubuntu5+esm6