CVE-2026-5056

EUVD-2026-50497

29.07.2026, 20:17

GStreamer qtdemux Stack-based Buffer Overflow Remote Code Execution Vulnerability. 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 UncompressedFrameConfigBox structures. 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. Was ZDI-CAN-29392.

Provider	Type	Base Score	Atk. Vector	Atk. Complexity	Priv. Required	Vector
NIST	Primary	7.8 HIGH	LOCAL	LOW	NONE	CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Awaiting analysis

This vulnerability is currently awaiting analysis.

Base Score

CVSS 3.x

EPSS Score

Percentile: Unknown

Debian Releases

Debian Product

Codename

gst-plugins-good1.0

bookworm	1.22.0-5+deb12u3 fixed
bookworm (security)	1.22.0-5+deb12u2 fixed
bullseye	1.18.4-2+deb11u2 fixed
bullseye (security)	1.18.4-2+deb11u4 fixed
forky	1.28.5-1 fixed
sid	1.28.5-1 fixed
trixie	1.26.2-1+deb13u2 fixed
trixie (security)	1.26.2-1+deb13u2 fixed

Common Weakness Enumeration

CWE-121 - Stack-based Buffer Overflow
A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function).

References

https://gitlab.freedesktop.org/api/v4/projects/gstreamer%2Fgstreamer/repository/files/security-advisories%2Fsa-2026-0016.md/raw?ref=main

https://www.zerodayinitiative.com/advisories/ZDI-26-283/

http://www.openwall.com/lists/oss-security/2026/05/01/1