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CVE-2026-64833

7.1 · HIGH

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…

Published Jul 22, 2026CWE-125EPSS 0.40%

Overview

CVE-2026-64833 is a high-severity vulnerability. It was published on July 22, 2026 and has a CVSS 3.1 base score of 7.1 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.1, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refcode.ffmpeg.org/FFmpeg/FFmpeg/commit/6f80e2765492700622596af720534cef33dd31b4Refcode.ffmpeg.org/FFmpeg/FFmpeg/pulls/23661Refwww.vulncheck.com/advisories/ffmpeg-out-of-bounds-read-via-s-pdif-muxer-spdifenc-c

How CyberStrike helps

Frequently asked questions

What is CVE-2026-64833?

CVE-2026-64833 is a high-severity vulnerability. It was published on July 22, 2026 and has a CVSS 3.1 base score of 7.1 (HIGH).

How severe is CVE-2026-64833?

This vulnerability has a CVSS 3.1 base score of 7.1, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-64833?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-64833?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-64833 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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