Advisory Details

July 3rd, 2025

GStreamer H266 Codec Parsing Stack-based Buffer Overflow Remote Code Execution Vulnerability

CVE ID	CVE-2025-6663
CVSS SCORE	7.8, AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
AFFECTED VENDORS	GStreamer
AFFECTED PRODUCTS	GStreamer
VULNERABILITY DETAILS	This vulnerability allows remote attackers to execute arbitrary code on affected installations of GStreamer. Interaction with this library is required to exploit this vulnerability but attack vectors may vary depending on the implementation. The specific flaw exists within the parsing of H266 sei messages. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a fixed-length stack-based buffer. An attacker can leverage this vulnerability to execute code in the context of the current process.
ADDITIONAL DETAILS	GStreamer has issued an update to correct this vulnerability. More details can be found at: https://gitlab.freedesktop.org/tpm/gstreamer/-/commit/eedd01ac3dfeb60e36a44bb61a6d0418454e8416
DISCLOSURE TIMELINE	2025-06-23 - Vulnerability reported to vendor 2025-07-03 - Coordinated public release of advisory 2025-07-03 - Advisory Updated
CREDIT	MICHAEL RANDRIANANTENAINA [https://elkamika.blogspot.com/]

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