A security flaw has been discovered in GPAC up to 2.4.0. Affected is the function MergeFragment of the file src/isomedia/isom_intern.c of the component MP4Box. The manipulation results in null pointer dereference. The attack needs to be approached locally. The exploit has been released to the public and may be used for attacks. The patch is identified as 525bf1af642c30af04e4df5345e6d798c0a4d8a1. It is advisable to implement a patch to correct this issue.

Attack Vector Local

Attack Complexity Low

Privileges Required Low

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact None

Vulnerable System Integrity Impact None

Vulnerable System Availability Impact Low

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Local

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact Low

User Interaction None

Attack Vector Local

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact Low

User Interaction None

Access Vector Local

Access Complexity Low

Authentication Single

Confidentiality Impact None

Integrity Impact None

Availability Impact Partial

This CVE is not in the KEV list.

No EPSS score available.

Exploitation poc

Automatable no

Technical Impact partial

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
n/a GPAC affected
Version Status Constraints
2.0 affected —
2.1 affected —
2.2 affected —
2.3 affected —
2.4.0 affected —

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Project Subscriptions

Vendors Products
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Advisories

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Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://github.com/gpac/gpac/ cve-icon cve-icon
https://github.com/gpac/gpac/issues/3549 cve-icon cve-icon
https://github.com/makesoftwaresafe/gpac/commit/525bf1af642c30af04e4df5345e6d798c0a4d8a1 cve-icon cve-icon
https://github.com/user-attachments/files/27196918/poc.zip cve-icon cve-icon
https://vuldb.com/submit/816075 cve-icon cve-icon
https://vuldb.com/vuln/365629 cve-icon cve-icon
https://vuldb.com/vuln/365629/cti cve-icon cve-icon
History

Tue, 26 May 2026 19:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Tue, 26 May 2026 18:00:00 +0000

Type Values Removed Values Added
Description A security flaw has been discovered in GPAC up to 2.4.0. Affected is the function MergeFragment of the file src/isomedia/isom_intern.c of the component MP4Box. The manipulation results in null pointer dereference. The attack needs to be approached locally. The exploit has been released to the public and may be used for attacks. The patch is identified as 525bf1af642c30af04e4df5345e6d798c0a4d8a1. It is advisable to implement a patch to correct this issue.
Title GPAC MP4Box isom_intern.c MergeFragment null pointer dereference
First Time appeared Gpac
Gpac gpac
Weaknesses CWE-404
CWE-476
CPEs cpe:2.3:a:gpac:gpac:*:*:*:*:*:*:*:*
Vendors & Products Gpac
Gpac gpac
References
Metrics cvssV2_0

{'score': 1.7, 'vector': 'AV:L/AC:L/Au:S/C:N/I:N/A:P/E:POC/RL:OF/RC:C'}

cvssV3_0

{'score': 3.3, 'vector': 'CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C'}

cvssV3_1

{'score': 3.3, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C'}

cvssV4_0

{'score': 4.8, 'vector': 'CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: VulDB

Published:

Updated: 2026-05-26T18:23:16.064Z

Reserved: 2026-05-26T10:52:27.927Z

Link: CVE-2026-9567

cve-icon Vulnrichment

Updated: 2026-05-26T18:23:09.559Z

cve-icon NVD

Status : Deferred

Published: 2026-05-26T18:16:58.883

Modified: 2026-05-26T19:37:00.120

Link: CVE-2026-9567

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-05-26T19:45:06Z

Weaknesses