CVE-2026-64833 | FFmpeg versions 0.7.1 through 8.1.2 contain an out-of-bounds… | CVSS 7.1 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.

Metadata

CVE ID: CVE-2026-64833
State: PUBLISHED
Assigner: VulnCheck
Reserved: 2026-07-20 18:27 UTC
Published: 2026-07-22 17:03 UTC
Last updated: 2026-07-22 18:23 UTC
Primary CWE: CWE-125
Out-of-bounds Read
Vendor / Product: FFmpeg / FFmpeg
Sources: cve.org · NVD

Severity & Metrics

7.1 HIGH CVSS 3.1

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H

SSVC — CISA Coordinator

Exploitation: none
Automatable: yes
Tech. Impact: partial

Affected products (1)

Vendor	Product	Platform	Versions
FFmpeg	FFmpeg	—	0.7.1 ≤ 8.1.2, 6f80e2765492700622596af720534cef33dd31b4

Weakness (CWE)

CWE	Source	Description
CWE-125	cna	Out-of-bounds Read

CVSS scores (2)

Score	Severity	Version	Source	Vector
7.1	HIGH	4.0	cna	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N
7.1	HIGH	3.1	cna	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H

References (3)