GPAC up to 1.0.1 reframe_nalu.c naludmx_create_avc_decoder_config null pointer dereference

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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A vulnerability was found in GPAC up to 1.0.1 and classified as problematic. This issue affects the function naludmx_create_avc_decoder_config of the file reframe_nalu.c. The manipulation with an unknown input leads to a denial of service vulnerability. Using CWE to declare the problem leads to CWE-476. Impacted is availability. The summary by CVE is:

A Segmentation fault exists casued by null pointer dereference exists in Gpac through 1.0.1 via the naludmx_create_avc_decoder_config function in reframe_nalu.c when using mp4box, which causes a denial of service.

The weakness was shared 01/13/2022 as 1892. The advisory is shared at The identification of this vulnerability is CVE-2021-40563 since 09/07/2021. The attack needs to be initiated within the local network. A simple authentication is needed for exploitation. Technical details are known, but no exploit is available.

Applying the patch 5ce0c906ed8599d218036b18b78e8126a496f137 is able to eliminate this problem. The bugfix is ready for download at



CPE 2.3infoedit

CPE 2.2infoedit


VulDB Meta Base Score: 3.5
VulDB Meta Temp Score: 3.4

VulDB Base Score: 3.5
VulDB Temp Score: 3.4
VulDB Vector: 🔒
VulDB Reliability: 🔍



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


Class: Denial of service
CWE: CWE-476
ATT&CK: Unknown

Local: No
Remote: Partially

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒


Threat Intelligenceinfoedit

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


Recommended: Patch
Status: 🔍

0-Day Time: 🔒

Patch: 5ce0c906ed8599d218036b18b78e8126a496f137


09/07/2021 CVE assigned
01/13/2022 +128 days Advisory disclosed
01/13/2022 +0 days VulDB entry created
01/15/2022 +2 days VulDB last update


Advisory: 1892
Status: Confirmed

CVE: CVE-2021-40563 (🔒)


Created: 01/13/2022 06:56 AM
Updated: 01/15/2022 01:27 PM
Changes: (1) source_cve_nvd_summary
Complete: 🔍


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