VDB-323211 · CVE-2025-9951 · GHSA-39q3-f8jq-v6mg

FFmpeg up to 7.x jpeg2000dec heap-based overflow

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
4.8	$0-$5k	0.00

Summaryinfo

A vulnerability was found in FFmpeg up to 7.x. It has been rated as critical. This impacts an unknown function of the component jpeg2000dec. Performing a manipulation results in heap-based overflow. This vulnerability is identified as CVE-2025-9951. The attack can be initiated remotely. There is not any exploit available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability, which was classified as critical, was found in FFmpeg up to 7.x. This affects an unknown function of the component jpeg2000dec. The manipulation with an unknown input leads to a heap-based overflow vulnerability. CWE is classifying the issue as CWE-122. A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc(). This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

A heap-buffer-overflow write exists in jpeg2000dec FFmpeg which allows an attacker to potentially gain remote code execution or cause denial of service via the channel definition cdef atom of JPEG2000.

It is possible to read the advisory at github.com. This vulnerability is uniquely identified as CVE-2025-9951 since 09/03/2025. The exploitability is told to be difficult. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. It demands that the victim is doing some kind of user interaction. The technical details are unknown and an exploit is not publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 264495 (Linux Distros Unpatched Vulnerability : CVE-2025-9951), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 8.0 eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (264495) and EUVD (EUVD-2025-27255). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

Multimedia Processing Software

Name

FFmpeg

Version

License

open-source

Website

Product: https://ffmpeg.org/

CPE 2.3info

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CPE 2.2info

🔒

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 5.0
VulDB Meta Temp Score: 4.8

VulDB Base Score: 5.0
VulDB Temp Score: 4.8
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AV	AC	Au	C	I	A
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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Heap-based overflow
CWE: CWE-122 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Nessus ID: 264495
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2025-9951

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: FFmpeg 8.0

Timelineinfo

09/03/2025 CVE reserved
09/09/2025 +6 days Advisory disclosed
09/09/2025 +0 days VulDB entry created
09/11/2025 +2 days VulDB entry last update

Sourcesinfo

Product: ffmpeg.org

Advisory: GHSA-39q3-f8jq-v6mg
Status: Confirmed

CVE: CVE-2025-9951 (🔒)
GCVE (CVE): GCVE-0-2025-9951
GCVE (VulDB): GCVE-100-323211
EUVD: 🔒

Entryinfo

Created: 09/09/2025 17:54
Updated: 09/11/2025 20:57
Changes: 09/09/2025 17:54 (68), 09/10/2025 09:01 (1), 09/11/2025 20:57 (2)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.