NVD / CVE Program· CNA VulnCheck

CVE-2026-70629: FFmpeg 3.0 < 9.0 Uninitialized Heap Memory Read in RSCC Decoder

Noroxi assessment

Priority: Monitor (action score 27/100)

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: 0.17% (FIRST EPSS).
Someone with local access to the system 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) 4.4.8-5.1.
Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

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) 4.4.8-5.1 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 versions from 3.0 up to, but not including, 9.0 contain an uninitialized heap memory read vulnerability in the native RSCC decoder (libavcodec/rscc.c) that allows attackers to disclose heap memory contents by supplying a crafted video file with a compressed tile that decompresses fewer bytes than the declared tile geometry requires. When rscc_decode_frame() calls av_image_copy_plane() without validating the decompressed byte count against the tile dimensions, the unwritten suffix of the persistent intermediate buffer ctx->inflated_buf is copied into the decoded frame, potentially exposing data from prior heap allocations or previous decoded frames in persistent decoding services.

MediumCVSS 6.8 · v4.0—No exploit Fix available

Memory safety

Published: Aug 6, 2026
Updated: Sep 1, 2026
EPSS: 0.1% · 6th percentile
CWE: CWE-908

Report tools

JSON

Action score

Monitor

Low priority for now.

CVSS: 27 / 40 · 6.8 / 10
CISA KEV: 0 / 30 · Not listed
EPSS: 0 / 30 · 0.1%

CISA SSVC decision

Exploitation: none
Automatable: no
Technical impact: partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD: —
CNA · VulnCheck: 6.8; NVD has not scored this yet; the score shown is the CNA’s.

CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:N/VA:N/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.

Running WordPress? Scan your site free with WP Lens

Is your version affected? Check it

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.

We use this product, ask for help

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.

Vendor	Product	CPE
ffmpeg	ffmpeg	cpe:2.3:a:ffmpeg:ffmpeg

Affected versions

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

ffmpeg ffmpeg3.0 and later · before 9

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
- 3.0 and later · before 9.0affected

Package-level exposure

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

Ecosystem	Package	Affected range	Fix
Debian:12	ffmpeg	from 0	—
Debian:14	ffmpeg	before 7:9.0.2-1	7:9.0.2-1
openSUSE:Leap 16.0	ffmpeg-7	before 7.1.5-160000.1.1	7.1.5-160000.1.1
openSUSE:Tumbleweed	ffmpeg-4	before 4.4.8-5.1	4.4.8-5.1
openSUSE:Tumbleweed	ffmpeg-7	before 7.1.5-2.1	7.1.5-2.1
openSUSE:Tumbleweed	ffmpeg-8	before 8.1.2-3.1	8.1.2-3.1
openSUSE:Tumbleweed	ffmpeg-9	before 9.0.1-3.1	9.0.1-3.1
SUSE:Linux Enterprise High Performance Computing 15 SP4-ESPOS	ffmpeg-4	before 4.4.8-150400.3.75.1	4.4.8-150400.3.75.1
SUSE:Linux Enterprise Module for Package Hub 15 SP7	ffmpeg-4	before 4.4.8-150600.13.55.1	4.4.8-150600.13.55.1

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-2026-66041Jul 24, 2026 · FFmpeg 7.0 - 8.1.2 Heap Out-of-Bounds Write via vf_quirc Filter
30Monitor
← EarlierCVE-2026-70628Aug 6, 2026 · FFmpeg 0.5 < 9.0 DVB Subtitle Parser Heap Buffer Overflow via WTV File
34Monitor
Later →CVE-2026-70630Aug 6, 2026 · FFmpeg 3.0 < 9.0 Uninitialized Heap Memory Read in Screenpresso Decoder
27Monitor

Remediation

Which version to upgrade to

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

Product / package	Fixed version	Source
debian:ffmpeg	7:9.0.2-1 · Debian:14	Package registry (OSV)
opensuse:ffmpeg-4	4.4.8-5.1 · openSUSE:Tumbleweed	Package registry (OSV)
opensuse:ffmpeg-7	7.1.5-2.1 · openSUSE:Tumbleweed	Package registry (OSV)
opensuse:ffmpeg-8	8.1.2-3.1 · openSUSE:Tumbleweed	Package registry (OSV)
opensuse:ffmpeg-9	9.0.1-3.1 · openSUSE:Tumbleweed	Package registry (OSV)
suse:ffmpeg-4	4.4.8-150600.13.55.1 · SUSE:Linux Enterprise Module for Package Hub 15 SP7	Package 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.

Adrian Junge (vurlo)finder

Variant candidates

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

CVE-2026-6603813 days apartFFmpeg LCL/ZLIB Video Decoder Information Disclosure via lcldec.c
28Monitor
CVE-2026-706300 days apartFFmpeg 3.0 < 9.0 Uninitialized Heap Memory Read in Screenpresso Decoder
27Monitor
CVE-2026-706310 days apartFFmpeg 0.5 < 9.0 Uninitialized Heap Memory Read in TIFF Decoder
27Monitor
CVE-2026-12024487 days apartFFmpeg 2.1 through 9.0.2 Uninitialized Memory Leak via PCX Decoder
27Monitor
CVE-2026-12024587 days apartFFmpeg 0.10 through 9.0.2 Uninitialized Memory Disclosure via Sun Raster Decoder
27Monitor
CVE-2026-12024787 days apartFFmpeg 2.3 through 9.0.2 Huffyuv Decoder Uninitialized Heap Memory Disclosure
27Monitor

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).

National notice (Türkiye Cybersecurity Directorate / USOM)

Official security notices citing this record; remediation advice is on the agency's page.

TR-26-0778 · Aug 7, 2026(FFmpeg Güvenlik Zafiyeti)

All national notices →

Technical details

Attack conditions

Someone with local access to the system can trigger it.
No account or password is required.
No special conditions are required; it is repeatable.

If successful

Confidentiality
Integrity
Availability

Attack vector: Local
Attack complexity: Low
Privileges required: None
User interaction: P
Scope: X

Weakness class (CWE)

CWE-908 · Use of Uninitialized Resource

CVSS vector

CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:N/VA:N/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.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

Fix✗ → ✓Sep 28, 2026, 10:49 PM UTC

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

References

code.ffmpeg.org/FFmpeg/FFmpeg/commit/533a6198505edd1379e1cd722852350ae4a85acc

Show all references (4 more)

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

All records