CVE-2026-64833 FFmpeg 0.7.1 - 8.1.2 Out-of-Bounds Read via S/PDIF Muxer spdifenc.c
Attackers can read sensitive memory contents by providing a crafted DTS audio stream to the S/PDIF muxer in FFmpeg.
- 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-2026-64833?
CVE-2026-64833 is a high-severity vulnerability in Ffmpeg Ffmpeg, published on 22 Jul 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
FFmpeg versions 0.7.1 through 8.1.2 contain an out-of-bounds read vulnerability in the S/PDIF muxer that allows attackers to access memory beyond buffer boundaries by supplying a crafted DTS stream with a core_size value larger than the actual packet length. Attackers can exploit the missing bounds check in the spdif_header_dts4 function by providing a malicious DTS-HD audio stream during S/PDIF re-muxing to trigger unauthorized memory reads beyond the packet buffer.
Weakness: CWE-125
Which versions are affected by CVE-2026-64833?
It affects 1 product.
Products include Ffmpeg Ffmpeg.
How do I fix CVE-2026-64833?
Apply the vendor's patch.
Is CVE-2026-64833 being exploited?
There is no known exploitation of CVE-2026-64833 in the wild and no public exploit code.
Other vulnerabilities in Ffmpeg Ffmpeg
Sources
Also known as DEBIAN-CVE-2026-64833, ECHO-9d31-8859-4c82, GHSA-34g6-m4cp-w5c9, JLSEC-2026-1175, MINI-98jv-2xxp-3xh3, UBUNTU-CVE-2026-64833.