GPAC 2.4 MP4Box isomedia/isom_read.c gf_isom_get_user_data_count null pointer dereference

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.
3.5$0-$5k0.00

Summaryinfo

A vulnerability was found in GPAC 2.4 and classified as problematic. This vulnerability affects the function gf_isom_get_user_data_count of the file isomedia/isom_read.c of the component MP4Box. Executing a manipulation can lead to null pointer dereference. This vulnerability is handled as CVE-2025-55651. There is not any exploit available.

Detailsinfo

A vulnerability classified as problematic was found in GPAC 2.4. This vulnerability affects the function gf_isom_get_user_data_count of the file isomedia/isom_read.c of the component MP4Box. The manipulation with an unknown input leads to a null pointer dereference vulnerability. The CWE definition for the vulnerability is CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. As an impact it is known to affect availability. CVE summarizes:

A NULL pointer dereference in the gf_isom_get_user_data_count function (isomedia/isom_read.c) of GPAC MP4Box v2.4 allows attackers to cause a Denial of Service (DoS) via supplying a crafted MP4 file.

The advisory is shared for download at infosec.exchange. This vulnerability was named CVE-2025-55651 since 08/13/2025. There are known technical details, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 320362 (Linux Distros Unpatched Vulnerability : CVE-2025-55651), which helps to determine the existence of the flaw in a target environment.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at Tenable (320362). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Type

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 3.5
VulDB Meta Temp Score: 3.5

VulDB Base Score: 3.5
VulDB Temp Score: 3.5
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
💳💳💳💳💳💳
💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock

VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Null pointer dereference
CWE: CWE-476 / CWE-404
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Partially

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

0-DayUnlockUnlockUnlockUnlock
TodayUnlockUnlockUnlockUnlock

Nessus ID: 320362
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2025-55651

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfo

08/13/2025 CVE reserved
06/09/2026 +300 days Advisory disclosed
06/09/2026 +0 days VulDB entry created
06/10/2026 +1 days VulDB entry last update

Sourcesinfo

Advisory: infosec.exchange
Status: Not defined

CVE: CVE-2025-55651 (🔒)
GCVE (CVE): GCVE-0-2025-55651
GCVE (VulDB): GCVE-100-369856

Entryinfo

Created: 06/09/2026 21:15
Updated: 06/10/2026 19:31
Changes: 06/09/2026 21:15 (55), 06/10/2026 19:31 (2)
Complete: 🔍
Cache ID: 216::103

VulDB is the best source for vulnerability data and more expert information about this specific topic.

Discussion

No comments yet. Languages: en.

Please log in to comment.

◂ PreviousOverviewNext ▸

Do you need the next level of professionalism?

Upgrade your account now!