CVE-2025-6663

A stack based buffer overflow was found in the GStreamer media handling library. This flaw allows an attacker who is able to feed in a maliciously constructed H266 file to execute arbitrary code in the context of the process running GStreamer.

No Red Hat products or offerings are affected by this vulnerability.

This vulnerability has been rated as Important rather than Moderate due to its capability to enable remote code execution (RCE) through a stack-based buffer overflow. Unlike typical parsing defects that primarily lead to denial of service, this specific flaw allows an attacker to gain control of the instruction pointer by corrupting stack memory, thereby creating an opportunity for arbitrary code execution. Given GStreamer's widespread use across desktop environments and various media applications, including web browsers, chat clients, and media players, an attacker could exploit this by enticing a user to open or stream a specially crafted malicious video file. The fact that successful exploitation does not require elevated privileges or complex user interaction significantly escalates both its exploitability and potential impact, marking this as a high-severity security concern for end-user systems.

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.