Stack-based Buffer Overflow Vulnerability in GStreamer H266 Codec by GStreamer

CVE-2025-6663

What is CVE-2025-6663?

CVE-2025-6663 is a stack-based buffer overflow vulnerability found in the GStreamer H266 Codec, a component of the GStreamer multimedia framework, which is widely used for handling audio and video streams in various applications. This particular vulnerability arises from improper validation of user-supplied data when parsing H266 sei messages, leading to the possibility of executing arbitrary code on affected installations. If successfully exploited, the attacker could manipulate how the codec processes data, resulting in potentially severe consequences for the application's integrity and confidentiality. Organizations utilizing GStreamer in environments that require secure audio or video processing may find themselves at heightened risk if they do not adequately address this vulnerability.

Potential Impact of CVE-2025-6663

1. Arbitrary Code Execution: The most significant risk associated with CVE-2025-6663 is the potential for an attacker to execute arbitrary code in the context of the current process. This can allow malicious actors to gain unauthorized access to system resources, leading to system compromise.

2. Data Integrity Compromise: Given that the vulnerability allows code execution, it can also result in the alteration of data or the injection of malicious payloads. This integrity breach can compromise sensitive information and disrupt normal operations.

3. System Down Time and Recovery Costs: In the event of an exploit, organizations may face significant downtime as they address the fallout, including restoring systems from backups and applying necessary patches. This can lead to substantial operational and recovery costs, along with potential damage to the organization’s reputation.

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