Double Free Vulnerability in GPAC MP4Box Affects Various Versions
CVE-2025-15667

4.8MEDIUM

Key Information:

Vendor

GPAC

Status
Gpac
Vendor
CVE Published:
6 July 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-15667?

A vulnerability within GPAC's MP4Box component, specifically in the gf_isom_nalu_sample_rewrite function of avc_ext.c, has been identified. This issue arises from the manipulation of the nalu_out_bs argument, leading to a potential double free condition. An attacker can exploit this vulnerability on the local host, which raises concerns about system integrity and stability. A patch has been released to mitigate this vulnerability, and it is advisable for users to apply this update promptly to safeguard their systems.

Affected Version(s)

GPAC 2.5-DEV

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2025-15667 - Proof of Concept

References

https://vuldb.com/vuln/376292
vdb-entrytechnical-description
https://vuldb.com/vuln/376292/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2025-15667
third-party-advisory

CVSS V4

Score:
4.8
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
Low
Attack Vector:
Local
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

noki (VulDB User)
.