PT-2026-63442 · FFmpeg · Ffmpeg

CVE-2026-64833 · Published 2026-07-22 · Updated 2026-07-22

Mitre

CVSS v3.1

7.1

High

Base vector

AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H

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.

Fix

Out of bounds Read

Weakness Enumeration

CWE-125

Related Identifiers

CVE-2026-64833

Affected Products

Ffmpeg

References · 4

• https://nvd.nist.gov/vuln/detail/CVE-2026-64833 · Security Note
• https://code.ffmpeg.org/FFmpeg/FFmpeg/commit/6f80e2765492700622596af720534cef33dd31b4 · Patch
• https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/23661 · Note
• https://vulncheck.com/advisories/ffmpeg-out-of-bounds-read-via-s-pdif-muxer-spdifenc-c · Note