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: 8.4 [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]
CVE-ID: CVE-2026-39043
CWE-ID: CWE-122
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
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.
Affected software
gst-plugins-good
gstreamer
Debian Linux
Ubuntu
gst-plugins-good1.0 (Ubuntu package)
gst-plugins-good1.0 (Debian package)
gstreamer
Debian Linux
Ubuntu
gst-plugins-good1.0 (Ubuntu package)
gst-plugins-good1.0 (Debian package)
How to mitigate CVE-2026-39043
Install security update from vendor's website.
gst-plugins-good - update to 1.28.2
gstreamer - update to 1.28.2
gst-plugins-good1.0 (Ubuntu package) - addressed in versions 1.20.3-0ubuntu1.7, 1.24.2-1ubuntu1.5, 1.28.2-2ubuntu0.1
gst-plugins-good1.0 (Debian package) - update to 1.26.2-1+deb13u2
gstreamer - update to 1.28.2
gst-plugins-good1.0 (Ubuntu package) - addressed in versions 1.20.3-0ubuntu1.7, 1.24.2-1ubuntu1.5, 1.28.2-2ubuntu0.1
gst-plugins-good1.0 (Debian package) - update to 1.26.2-1+deb13u2