#VU111986 Buffer overflow in gst-plugins-bad and gstreamer - CVE-2025-6663

Vulnerability identifier: #VU111986

Vulnerability risk: High

CVSSv4.0: 6.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2025-6663

CWE-ID: CWE-119

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
gst-plugins-bad
Other software / Other software solutions
gstreamer
Client/Desktop applications / Multimedia software

Vendor: GStreamer

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error within the H.266 video bitstream parser. A remote attacker can create a specially crafted file, trick the victim into opening it, trigger memory corruption and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

gst-plugins-bad: 1.26.0 - 1.26.2

gstreamer: 1.26.0 - 1.26.2

---

External links
https://gstreamer.freedesktop.org/security/sa-2025-0007.html

---

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.