Check Point Advisories

GStreamer Buffer Overflow (CVE-2025-3887)

Vulnerability
Protection

Check Point Reference:	CPAI-2025-18880
Date Published:	1 Oct 2026
Severity:	High
Last Updated:	Thursday 01 October, 2026
Source:
Industry Reference:	CVE-2025-3887
Protection Provided by:	Security Gateway R82, R81, R80, R77, R75
Who is Vulnerable?	GStreamer 1.0.0 and later, prior to 1.26.1
Vulnerability Description	A buffer overflow vulnerability in GStreamer allows remote attackers to execute arbitrary code by exploiting improper validation of H265 slice headers. This can result in code execution within the context of the current process.

Protection Overview

This protection detects attempts to exploit this vulnerability.

In order for the protection to be activated, update your Security Gateway product to the latest IPS update. For information on how to update IPS, go to SBP-2006-05, click on Protection tab and select the version of your choice.

Security Gateway R82 / R81 / R80 / R77 / R75

In the IPS tab, click Protections and find the GStreamer Buffer Overflow (CVE-2025-3887) protection using the Search tool and Edit the protection's settings.
Install policy on all Security Gateways.

This protection's log will contain the following information:

Attack Name: Web Server Enforcement Violation.
Attack Information: GStreamer Buffer Overflow (CVE-2025-3887)