CVE-2023-6603 Ffmpeg: null pointer dereference in ffmpeg hls parsing

What is CVE-2023-6603?

CVE-2023-6603 is a high-severity vulnerability in Ffmpeg Ffmpeg, published on 31 Dec 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

A flaw was found in FFmpeg's HLS playlist parsing. This vulnerability allows a denial of service via a maliciously crafted HLS playlist that triggers a null pointer dereference during initialization.

Weakness: CWE-476

Which versions are affected by CVE-2023-6603?

It affects 1 product.

Products include Ffmpeg Ffmpeg.

How do I fix CVE-2023-6603?

Apply the vendor's patch.

Is CVE-2023-6603 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-6603 exists.

Other vulnerabilities in Ffmpeg Ffmpeg

• CVE-2013-0864 Memory corruption in n/a Critical 10.0
• CVE-2013-0872 Memory corruption in n/a Critical 10.0
• CVE-2013-0873 Memory corruption in n/a Critical 10.0
• CVE-2013-4265 Null dereference in n/a Critical 10.0
• CVE-2011-3937 Memory corruption in n/a Critical 10.0

All Ffmpeg Ffmpeg vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as DEBIAN-CVE-2023-6603, GHSA-gxvx-w63c-jprw, JLSEC-2025-143, UBUNTU-CVE-2023-6603, USN-7890-1.