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Libav: 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… (CVE-2026-66036)

0
Medium
VulnerabilityCVE-2026-66036gcveosvghsa-575m-jfmw-q76ccve-2026-66036ghsaubuntu-cve-2026-66036ubuntu-pro-14-04-ltsubuntu-pro-16-04-ltsubuntu-pro-18-04-ltsubuntu-pro-20-04-ltsubuntu-pro-22-04-ltsubuntu-pro-24-04-ltsubuntu-pro-26-04-ltsubuntu-26-10
Published: 07/24/2026 (07/24/2026, 20:18:00 UTC)
Source: GCVE Database
Product: libav

Description

FFmpeg versions through 8.1.2 contain a heap out-of-bounds write vulnerability in the vf_hqdn3d filter. This flaw occurs when a crafted video input has increasing frame resolution between frames while filtergraph reinitialization is disabled (-reinit_filter 0). The vulnerability allows heap memory corruption due to undersized buffer allocation for line-history, leading to out-of-bounds writes during denoising operations.

CVSS v3.1

8.8high

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected software

GitHub Actionsmore threats →ai
ffmpeg/FFmpeg
pkg:github/ffmpeg/FFmpeg
Affected versions
<=8.1.2
Ubuntu:Pro:14.04:LTSmore threats →ghsa
libav
pkg:deb/ubuntu/libav?arch=source&distro=esm-infra-legacy/trusty
Affected versions
=6:0.8.7-1ubuntu2=6:9.10-1ubuntu1=6:9.10-1ubuntu2=6:9.10-1ubuntu5=6:9.10-1ubuntu6=6:9.10-1ubuntu7=6:9.11-2ubuntu1=6:9.11-2ubuntu2=6:9.13-0ubuntu0.14.04.1=6:9.14-0ubuntu0.14.04.1=6:9.16-0ubuntu0.14.04.1=6:9.18-0ubuntu0.14.04.1=6:9.20-0ubuntu0.14.04.1=6:9.20-0ubuntu0.14.04.1+esm1
Ubuntu:Pro:16.04:LTSmore threats →ghsa
ffmpeg
pkg:deb/ubuntu/ffmpeg?arch=source&distro=esm-apps-legacy/xenial
Affected versions
<7:2.8.17-0ubuntu0.1+esm15=7:2.7.2-1build1=7:2.8.1-1ubuntu1=7:2.8.2-1ubuntu1=7:2.8.3-1=7:2.8.4-1=7:2.8.4-1ubuntu1=7:2.8.4-1ubuntu2=7:2.8.4-1ubuntu3=7:2.8.4-1ubuntu4=7:2.8.6-1ubuntu1=7:2.8.6-1ubuntu2=7:2.8.8-0ubuntu0.16.04.1=7:2.8.10-0ubuntu0.16.04.1=7:2.8.11-0ubuntu0.16.04.1=7:2.8.14-0ubuntu0.16.04.1=7:2.8.15-0ubuntu0.16.04.1=7:2.8.15-0ubuntu0.16.04.1+esm1=7:2.8.17-0ubuntu0.1=7:2.8.17-0ubuntu0.1+esm1=7:2.8.17-0ubuntu0.1+esm2=7:2.8.17-0ubuntu0.1+esm3=7:2.8.17-0ubuntu0.1+esm4=7:2.8.17-0ubuntu0.1+esm5=7:2.8.17-0ubuntu0.1+esm6=7:2.8.17-0ubuntu0.1+esm7=7:2.8.17-0ubuntu0.1+esm8=7:2.8.17-0ubuntu0.1+esm9=7:2.8.17-0ubuntu0.1+esm10=7:2.8.17-0ubuntu0.1+esm11=7:2.8.17-0ubuntu0.1+esm12=7:2.8.17-0ubuntu0.1+esm13=7:2.8.17-0ubuntu0.1+esm14
Ubuntu:Pro:18.04:LTSmore threats →ghsa
ffmpeg
pkg:deb/ubuntu/ffmpeg?arch=source&distro=esm-apps/bionic
Affected versions
<7:3.4.11-0ubuntu0.1+esm13=7:3.3.4-2=7:3.3.4-2build3=7:3.4-2ubuntu2=7:3.4-4=7:3.4-4build1=7:3.4.1-1=7:3.4.1-1build1=7:3.4.2-1=7:3.4.2-1build1=7:3.4.2-2=7:3.4.4-0ubuntu0.18.04.1=7:3.4.6-0ubuntu0.18.04.1=7:3.4.8-0ubuntu0.2=7:3.4.11-0ubuntu0.1=7:3.4.11-0ubuntu0.1+esm1=7:3.4.11-0ubuntu0.1+esm2=7:3.4.11-0ubuntu0.1+esm3=7:3.4.11-0ubuntu0.1+esm4=7:3.4.11-0ubuntu0.1+esm5=7:3.4.11-0ubuntu0.1+esm6=7:3.4.11-0ubuntu0.1+esm7=7:3.4.11-0ubuntu0.1+esm8=7:3.4.11-0ubuntu0.1+esm9=7:3.4.11-0ubuntu0.1+esm10=7:3.4.11-0ubuntu0.1+esm11=7:3.4.11-0ubuntu0.1+esm12
Ubuntu:Pro:20.04:LTSmore threats →ghsa
ffmpeg
pkg:deb/ubuntu/ffmpeg?arch=source&distro=esm-apps/focal
Affected versions
<7:4.2.7-0ubuntu0.1+esm14=7:4.1.4-1build2=7:4.2.1-2=7:4.2.1-2ubuntu1=7:4.2.2-1build1=7:4.2.2-1ubuntu1=7:4.2.4-1ubuntu0.1=7:4.2.4-1ubuntu0.1+esm1=7:4.2.7-0ubuntu0.1=7:4.2.7-0ubuntu0.1+esm1=7:4.2.7-0ubuntu0.1+esm2=7:4.2.7-0ubuntu0.1+esm3=7:4.2.7-0ubuntu0.1+esm4=7:4.2.7-0ubuntu0.1+esm5=7:4.2.7-0ubuntu0.1+esm6=7:4.2.7-0ubuntu0.1+esm7=7:4.2.7-0ubuntu0.1+esm8=7:4.2.7-0ubuntu0.1+esm9=7:4.2.7-0ubuntu0.1+esm10=7:4.2.7-0ubuntu0.1+esm11=7:4.2.7-0ubuntu0.1+esm12=7:4.2.7-0ubuntu0.1+esm13
Ubuntu:Pro:22.04:LTSmore threats →ghsa
ffmpeg
pkg:deb/ubuntu/ffmpeg?arch=source&distro=esm-apps/jammy
Affected versions
<7:4.4.2-0ubuntu0.22.04.1+esm13=7:4.4-6ubuntu5=7:4.4.1-2ubuntu1=7:4.4.1-3ubuntu1=7:4.4.1-3ubuntu2=7:4.4.1-3ubuntu3=7:4.4.1-3ubuntu5=7:4.4.2-0ubuntu0.22.04.1=7:4.4.2-0ubuntu0.22.04.1+esm1=7:4.4.2-0ubuntu0.22.04.1+esm2=7:4.4.2-0ubuntu0.22.04.1+esm3=7:4.4.2-0ubuntu0.22.04.1+esm4=7:4.4.2-0ubuntu0.22.04.1+esm5=7:4.4.2-0ubuntu0.22.04.1+esm6=7:4.4.2-0ubuntu0.22.04.1+esm7=7:4.4.2-0ubuntu0.22.04.1+esm8=7:4.4.2-0ubuntu0.22.04.1+esm9=7:4.4.2-0ubuntu0.22.04.1+esm10=7:4.4.2-0ubuntu0.22.04.1+esm11=7:4.4.2-0ubuntu0.22.04.1+esm12
Ubuntu:Pro:24.04:LTSmore threats →ghsa
ffmpeg
pkg:deb/ubuntu/ffmpeg?arch=source&distro=esm-apps/noble
Affected versions
<7:6.1.1-3ubuntu5+esm11=7:6.0-6ubuntu1=7:6.0-9ubuntu1=7:6.1-2ubuntu1=7:6.1-3ubuntu1=7:6.1-4ubuntu1=7:6.1-5ubuntu1=7:6.1.1-1ubuntu1=7:6.1.1-3ubuntu1=7:6.1.1-3ubuntu5=7:6.1.1-3ubuntu5+esm1=7:6.1.1-3ubuntu5+esm2=7:6.1.1-3ubuntu5+esm3=7:6.1.1-3ubuntu5+esm4=7:6.1.1-3ubuntu5+esm5=7:6.1.1-3ubuntu5+esm6=7:6.1.1-3ubuntu5+esm7=7:6.1.1-3ubuntu5+esm8=7:6.1.1-3ubuntu5+esm10
Ubuntu:26.10more threats →ghsa
ffmpeg
pkg:deb/ubuntu/ffmpeg?arch=source&distro=stonking
Affected versions
=7:8.0.1-3ubuntu2=7:8.1-3ubuntu3=7:8.1.2-2ubuntu2
Ubuntu:Pro:26.04:LTSmore threats →ghsa
ffmpeg
pkg:deb/ubuntu/ffmpeg?arch=source&distro=esm-apps/resolute
Affected versions
<7:8.0.1-3ubuntu2+esm3=7:7.1.1-1ubuntu4=7:7.1.2-1ubuntu3=7:7.1.2-1ubuntu4=7:7.1.3-1ubuntu1=7:8.0.1-2ubuntu1=7:8.0.1-3ubuntu1=7:8.0.1-3ubuntu2=7:8.0.1-3ubuntu2+esm1

Run on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.

Technical Details

Gcve Source
db.gcve.eu
Osv Id
GHSA-575m-jfmw-q76c
Osv Schema Version
1.4.0
Aliases
CVE-2026-66036
Database Specific Severity
HIGH
Cvss Version
4.0

Threat ID: 6a65422a9c2644c7f808a1a7

Added to database: 07/25/2026, 23:09:30 UTC

Last enriched: 08/08/2026, 16:58:34 UTC

Last updated: 10/24/2026, 08:45:12 UTC

Views: 112

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