CVE-2026-30754 Memory corruption in n/a
A memory corruption flaw in FFmpeg's RTP encoding allows attackers to execute arbitrary code or cause denial of service via crafted media files.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2026-30754?
CVE-2026-30754 is a high-severity memory corruption vulnerability in Ffmpeg Ffmpeg, published on 8 Sep 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
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.
Weakness: CWE-787
Which versions are affected by CVE-2026-30754?
It affects 1 product.
Products include Ffmpeg Ffmpeg.
How do I fix CVE-2026-30754?
Upgrade to a fixed version.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-30754 being exploited?
There is no known exploitation of CVE-2026-30754 in the wild and no public exploit code.
Other vulnerabilities in Ffmpeg Ffmpeg
Sources
Also known as DEBIAN-CVE-2026-30754, GHSA-crqp-42h3-7fcv, UBUNTU-CVE-2026-30754.