CVE-2026-64833

High

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.

SeverityHigh

CVSS7.1

Exploit probability—

ProductFfmpeg

PublishedJul 22, 2026

First seenJul 22, 2026

Weakness typeCWE-125Out-of-bounds read

How to fix

Patches

code.ffmpeg.org/FFmpeg/FFmpeg/commit/6f80e2765492700622596af720534cef33dd31b4

Affected products

Product	Affected versions	Fixed in
ffmpeg ffmpeg	0.7.1 ≤ v ≤ 8.1.2	—

Check your version

Choose the product and enter the version you run to see whether it falls in the affected range.

In the Intelligence 360 plan

Attack Surface Management

See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.