FFmpeg through 8.1.2, fixed in commit 5d7112c, contains a heap out-of-bounds write vulnerability in the vf_hqdn3d filter that allows attackers to corrupt heap memory by supplying a crafted video whose frame resolution increases between frames when filtergraph reinitialization is disabled via the -reinit_filter 0 option. Attackers can provide a malicious video input where vf_hqdn3d.config_input() allocates undersized per-plane line-history buffers based on the initial frame width, and subsequent larger frames cause denoise_spatial() to write beyond the allocation boundary, resulting in heap memory corruption.

Project Subscriptions

Vendors Products
Advisories
Source ID Title
Ubuntu USN Ubuntu USN USN-8671-1 FFmpeg vulnerabilities
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Fri, 31 Jul 2026 00:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-787
References
Metrics threat_severity

None

threat_severity

Important


Tue, 28 Jul 2026 01:30:00 +0000

Type Values Removed Values Added
CPEs cpe:2.3:a:ffmpeg:ffmpeg:*:*:*:*:*:*:*:*

Mon, 27 Jul 2026 20:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Fri, 24 Jul 2026 23:45:00 +0000

Type Values Removed Values Added
First Time appeared Ffmpeg
Ffmpeg ffmpeg
Vendors & Products Ffmpeg
Ffmpeg ffmpeg

Fri, 24 Jul 2026 19:45:00 +0000

Type Values Removed Values Added
Description FFmpeg through 8.1.2, fixed in commit 5d7112c, contains a heap out-of-bounds write vulnerability in the vf_hqdn3d filter that allows attackers to corrupt heap memory by supplying a crafted video whose frame resolution increases between frames when filtergraph reinitialization is disabled via the -reinit_filter 0 option. Attackers can provide a malicious video input where vf_hqdn3d.config_input() allocates undersized per-plane line-history buffers based on the initial frame width, and subsequent larger frames cause denoise_spatial() to write beyond the allocation boundary, resulting in heap memory corruption.
Title FFmpeg Heap Out-of-Bounds Write in vf_hqdn3d Filter
Weaknesses CWE-122
References
Metrics cvssV3_1

{'score': 8.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H'}

cvssV4_0

{'score': 7.7, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-07-29T03:55:35.961Z

Reserved: 2026-07-23T20:45:17.816Z

Link: CVE-2026-66036

cve-icon Vulnrichment

Updated: 2026-07-27T17:21:53.200Z

cve-icon NVD

Status : Analyzed

Published: 2026-07-24T20:18:20.433

Modified: 2026-08-07T01:05:17.870

Link: CVE-2026-66036

cve-icon Redhat

Severity : Important

Publid Date: 2026-07-24T19:34:16Z

Links: CVE-2026-66036 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-08-02T14:00:05Z

Weaknesses