Heap-based buffer overflow in gst-plugins-good and gstreamer - CVE-2026-39043
Published: May 22, 2026
Vulnerability identifier: #VU132159
CSH Severity: High
CVSS v4.0: CVSS:4.0/AV:L/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-2026-39043
CWE-ID: CWE-122
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: GStreamer
Affected software:
gst-plugins-good
gstreamer
gst-plugins-good
gstreamer
Detailed vulnerability description
The vulnerability allows a remote attacker to execute arbitrary code.
The vulnerability exists due to a heap-based buffer overflow in the Matroska demuxer when parsing a crafted Matroska file with bz2-compressed tracks. A remote attacker can provide a specially crafted Matroska file to execute arbitrary code.
The issue can also cause an application crash.
How to mitigate CVE-2026-39043
Install security update from vendor's website.