CVE-2026-5056

GStreamer qtdemux Stack-based Buffer Overflow Remote Code Execution Vulnerability

State: Published
Severity: 7.8 High
Published: Jul 29, 2026
Updated: Jul 30, 2026
Reserved: Mar 27, 2026

Description

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.

Scores

CVSS	Score	Vector	Source
3.0	7.8 High	CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H	zdi

Weaknesses

CWE-121 Stack-based Buffer Overflow

Affected Products

Product	Versions
GStreamerGStreamer	a303670510771b993867ddf62bff3bce0cb988c3Affected

References

ZDI-26-283
vendor-provided URLvendor-advisory
http://www.openwall.com/lists/oss-security/2026/05/01/1

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