Heap-based buffer overflow in gst-plugins-bad and gstreamer - #VU141124
Published: August 6, 2026
Vulnerability identifier: #VU141124
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: N/A
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 heap-based buffer overflow in the H.266 video bitstream parser slice header processing when parsing a crafted H.266 video stream. A remote attacker can supply a specially crafted H.266 video stream to execute arbitrary code.
The issue occurs in the code that tracks CTU entry points during slice header parsing, where writes to a fixed-size entry point array are not properly bounded before each write.
Affected software
gst-plugins-bad
gstreamer
gstreamer
Remediation
Install security update from vendor's website.
gst-plugins-bad - update to 1.28.5
gstreamer - update to 1.28.5
gstreamer - update to 1.28.5