CVE-2026-64833

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.

CVSS v3 7.1 HIGH

7.1^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.8 / Impact : 4.2

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact LOW

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://code.ffmpeg.org/FFmpeg/FFmpeg/commit/6f80e2765492700622596af720534cef33dd31b4	Patch
https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/23661	Issue Tracking Patch
https://www.vulncheck.com/advisories/ffmpeg-out-of-bounds-read-via-s-pdif-muxer-spdifenc-c	Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:ffmpeg:ffmpeg:*:*:*:*:*:*:*:*

History

28 Jul 2026, 17:01

Type	Values Removed	Values Added
References	~~() https://code.ffmpeg.org/FFmpeg/FFmpeg/commit/6f80e2765492700622596af720534cef33dd31b4 -~~	() https://code.ffmpeg.org/FFmpeg/FFmpeg/commit/6f80e2765492700622596af720534cef33dd31b4 - Patch
References	~~() https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/23661 -~~	() https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/23661 - Issue Tracking, Patch
References	~~() https://www.vulncheck.com/advisories/ffmpeg-out-of-bounds-read-via-s-pdif-muxer-spdifenc-c -~~	() https://www.vulncheck.com/advisories/ffmpeg-out-of-bounds-read-via-s-pdif-muxer-spdifenc-c - Third Party Advisory
CPE		cpe:2.3:a:ffmpeg:ffmpeg::::::::
First Time		Ffmpeg Ffmpeg ffmpeg

22 Jul 2026, 18:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-07-22 18:17

Updated : 2026-07-28 17:01

NVD link : CVE-2026-64833

Mitre link : CVE-2026-64833

CVE.ORG link : CVE-2026-64833

JSON object : View

Products Affected

ffmpeg

ffmpeg

CWE

CWE-125

Out-of-bounds Read

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