CVE-2026-64833

FFmpeg 0.7.1 - 8.1.2 Out-of-Bounds Read via S/PDIF Muxer spdifenc.c

HIGH
7.1
CVSS Score
Published: July 22, 2026 at 05:03 PM UTC
Updated: October 24, 2026 at 03:10 PM UTC
1 product affected across 1 vendorFFMPEG

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Severity
HIGH7.1
Exploit prediction
EPSS 0.4%
SSVC
No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

0.7.1 ≤ v ≤ 8.1.20.7.16f80e2765492700622596af720534cef33dd31b4

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.1HIGHVulnCheck
Vector?

Quick Info

StatusANALYZED
CWE
CWE-125

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