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NVD / CVE Program· CNA VulnCheck

CVE-2026-66036: FFmpeg Heap Out-of-Bounds Write in vf_hqdn3d Filter

Noroxi assessment

Priority: Monitor (action score 30/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.40% (FIRST EPSS).
  • Anyone who can reach it over the internet can trigger it. No account or password is required. No special conditions are required; it is repeatable.
  • Fixed version: ffmpeg (Debian:14) 7:9.0.2-1; ffmpeg-7 (openSUSE:Leap 16.0) 7.1.5-160000.1.1; ffmpeg-4 (openSUSE:Tumbleweed) 4.4.8-4.1.

Low priority for now. Upgrade to ffmpeg (Debian:14) 7:9.0.2-1; ffmpeg-7 (openSUSE:Leap 16.0) 7.1.5-160000.1.1; ffmpeg-4 (openSUSE:Tumbleweed) 4.4.8-4.1 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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.

HighCVSS 7.7 · v4.0—No exploit Fix available
Published
Jul 24, 2026
Updated
Aug 6, 2026
EPSS
0.4% · 33th percentile

Report tools

JSON

Action score

30

Monitor

Low priority for now.

CVSS
30 / 40 · 7.7 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.4%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · VulnCheck
7.7
NVD has not scored this yet; the score shown is the CNA’s.

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

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2026-66036

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
ffmpegffmpeg

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • ffmpeg ffmpegup to 8.1.2 inclusive

Versions reported by the vendor

Affected version ranges reported by the assigning authority (VulnCheck). Independent of NVD's CPE analysis and usually ahead of it.

  • FFmpeg FFmpeg

    • 5d7112c60e6f0f0742ce47d448e6da0718a70f4cnot affected
    • up to and including 8.1.2affected · semver

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12ffmpegfrom 0—
Debian:14ffmpegbefore 7:9.0.2-17:9.0.2-1
openSUSE:Leap 16.0ffmpeg-7before 7.1.5-160000.1.17.1.5-160000.1.1
openSUSE:Tumbleweedffmpeg-4before 4.4.8-4.14.4.8-4.1
openSUSE:Tumbleweedffmpeg-7before 7.1.5-2.17.1.5-2.1
openSUSE:Tumbleweedffmpeg-8before 8.1.2-3.18.1.2-3.1
openSUSE:Tumbleweedffmpeg-9before 9.0.1-2.19.0.1-2.1
Red Hat:enterprise_linux_ai:3.0::el9ffmpegbefore 0:6.1.6-9.el9ai0:6.1.6-9.el9ai
Red Hat:enterprise_linux_ai:3.0::el9ffmpeg-debuginfobefore 0:6.1.6-9.el9ai0:6.1.6-9.el9ai
Red Hat:enterprise_linux_ai:3.0::el9ffmpeg-debugsourcebefore 0:6.1.6-9.el9ai0:6.1.6-9.el9ai
Red Hat:enterprise_linux_ai:3.0::el9ffmpeg-free-rhaibefore 0:6.1.6-9.el9ai0:6.1.6-9.el9ai
Red Hat:enterprise_linux_ai:3.0::el9ffmpeg-free-rhai-debuginfobefore 0:6.1.6-9.el9ai0:6.1.6-9.el9ai
Red Hat:enterprise_linux_ai:3.0::el9ffmpeg-free-rhai-develbefore 0:6.1.6-9.el9ai0:6.1.6-9.el9ai
Red Hat:enterprise_linux_ai:3.0::el9libavcodec-free-rhaibefore 0:6.1.6-9.el9ai0:6.1.6-9.el9ai
Red Hat:enterprise_linux_ai:3.0::el9libavcodec-free-rhai-debuginfobefore 0:6.1.6-9.el9ai0:6.1.6-9.el9ai
Red Hat:enterprise_linux_ai:3.0::el9libavcodec-free-rhai-develbefore 0:6.1.6-9.el9ai0:6.1.6-9.el9ai
Red Hat:enterprise_linux_ai:3.0::el9libavdevice-free-rhaibefore 0:6.1.6-9.el9ai0:6.1.6-9.el9ai
Red Hat:enterprise_linux_ai:3.0::el9libavdevice-free-rhai-debuginfobefore 0:6.1.6-9.el9ai0:6.1.6-9.el9ai
Red Hat:enterprise_linux_ai:3.0::el9libavdevice-free-rhai-develbefore 0:6.1.6-9.el9ai0:6.1.6-9.el9ai
Red Hat:enterprise_linux_ai:3.0::el9libavfilter-free-rhaibefore 0:6.1.6-9.el9ai0:6.1.6-9.el9ai
Red Hat:enterprise_linux_ai:3.0::el9libavfilter-free-rhai-debuginfobefore 0:6.1.6-9.el9ai0:6.1.6-9.el9ai
Red Hat:enterprise_linux_ai:3.0::el9libavfilter-free-rhai-develbefore 0:6.1.6-9.el9ai0:6.1.6-9.el9ai
Red Hat:enterprise_linux_ai:3.0::el9libavformat-free-rhaibefore 0:6.1.6-9.el9ai0:6.1.6-9.el9ai
Red Hat:enterprise_linux_ai:3.0::el9libavformat-free-rhai-debuginfobefore 0:6.1.6-9.el9ai0:6.1.6-9.el9ai

+76

Same product

ffmpeg: all records

Other highest-scoring records for the same primary product.

  • CVE-2009-4637FFmpeg 0.5 allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via unknown vectors that trigger
    45Plan
  • CVE-2016-10190Heap-based buffer overflow in libavformat/http.c in FFmpeg before 2.8.10, 3.0.x before 3.0.5, 3.1.x before 3.1.6, and 3.2.x before 3.2.2 all
    42Plan
  • CVE-2009-4634Multiple integer underflows in FFmpeg 0.5 allow remote attackers to cause a denial of service and possibly execute arbitrary code via a craf
    42Plan

Published before and after this one in the same product

  • ← EarlierCVE-2026-65705Jul 23, 2026 · FFmpeg 3.4 - 8.1.2 vf_floodfill Out-of-Bounds Write via filter_frame()
    29Monitor
  • ← EarlierCVE-2026-65706Jul 23, 2026 · FFmpeg 3.0 - 8.1.2 vf_swaprect Out-of-Bounds Write via NV12 Frame Processing
    34Monitor
  • Later →CVE-2026-66037Jul 24, 2026 · FFmpeg IAMF Demuxer Uncontrolled Resource Consumption via mix_presentation_obu()
    28Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
debian:ffmpeg7:9.0.2-1 · Debian:14Package registry (OSV)
opensuse:ffmpeg-44.4.8-4.1 · openSUSE:TumbleweedPackage registry (OSV)
opensuse:ffmpeg-77.1.5-2.1 · openSUSE:TumbleweedPackage registry (OSV)
opensuse:ffmpeg-88.1.2-3.1 · openSUSE:TumbleweedPackage registry (OSV)
opensuse:ffmpeg-99.0.1-2.1 · openSUSE:TumbleweedPackage registry (OSV)
red hat:ffmpeg0:6.1.6-7.el9ai · Red Hat:enterprise_linux_ai:3.4::el9Package registry (OSV)
red hat:ffmpeg-debuginfo0:6.1.6-7.el9ai · Red Hat:enterprise_linux_ai:3.4::el9Package registry (OSV)
red hat:ffmpeg-debugsource0:6.1.6-7.el9ai · Red Hat:enterprise_linux_ai:3.4::el9Package registry (OSV)
red hat:ffmpeg-free-rhai0:6.1.6-7.el9ai · Red Hat:enterprise_linux_ai:3.4::el9Package registry (OSV)
red hat:ffmpeg-free-rhai-debuginfo0:6.1.6-7.el9ai · Red Hat:enterprise_linux_ai:3.4::el9Package registry (OSV)
red hat:ffmpeg-free-rhai-devel0:6.1.6-7.el9ai · Red Hat:enterprise_linux_ai:3.4::el9Package registry (OSV)
red hat:libavcodec-free-rhai0:6.1.6-7.el9ai · Red Hat:enterprise_linux_ai:3.4::el9Package registry (OSV)
red hat:libavcodec-free-rhai-debuginfo0:6.1.6-7.el9ai · Red Hat:enterprise_linux_ai:3.4::el9Package registry (OSV)
red hat:libavcodec-free-rhai-devel0:6.1.6-7.el9ai · Red Hat:enterprise_linux_ai:3.4::el9Package registry (OSV)
red hat:libavdevice-free-rhai0:6.1.6-7.el9ai · Red Hat:enterprise_linux_ai:3.4::el9Package registry (OSV)
red hat:libavdevice-free-rhai-debuginfo0:6.1.6-7.el9ai · Red Hat:enterprise_linux_ai:3.4::el9Package registry (OSV)
red hat:libavdevice-free-rhai-devel0:6.1.6-7.el9ai · Red Hat:enterprise_linux_ai:3.4::el9Package registry (OSV)
suse:ffmpeg3.4.2-150200.11.79.1 · SUSE:Linux Enterprise Module for Desktop Applications 15 SP7Package registry (OSV)
suse:ffmpeg-44.4.8-150600.13.55.1 · SUSE:Linux Enterprise Module for Package Hub 15 SP7Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

  • CVE-2026-7514326 days apartFFmpeg Heap Buffer Overflow via RIST Protocol Reader
    37Monitor
  • CVE-2026-660390 days apartFFmpeg MACE6 Audio Decoder Heap Out-of-Bounds Write via CAF File
    34Monitor
  • CVE-2026-660400 days apartFFmpeg Heap Out-of-Bounds Write via PNG/APNG eXIf Encoder
    34Monitor
  • CVE-2026-648302 days apartFFmpeg 2.1 - 8.1.2 Heap Buffer Overflow via VobSub Subtitle Demuxer
    34Monitor
  • CVE-2026-7514126 days apartFFmpeg Heap Buffer Overflow in hvcC Box Writer via HEVC Muxing
    34Monitor
  • CVE-2026-7514426 days apartFFmpeg Heap Buffer Overflow in VC-2/Dirac RTP Packetizer
    34Monitor

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
Integrity
Availability
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
P
Scope
X

Weakness class (CWE)

CWE-122 · Heap-based Buffer Overflow

CVSS 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

ATT&CK techniques

—

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (2 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records