Out-of-bounds read in gst-plugins-bad and gstreamer - CVE-2026-12891
Published: August 6, 2026
Vulnerability identifier: #VU141114
CSH Severity: Medium
CVSS v4: 6.7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-12891
CWE-ID: CWE-125
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to out-of-bounds read in the H.266/VVC parser when parsing VUI parameters from the sequence parameter set. A local user can provide a crafted H.266/VVC media file with an invalid aspect ratio index to cause a denial of service.
User interaction is required to open or process a crafted media file.
Affected software
gst-plugins-bad
gstreamer
gstreamer
How to mitigate CVE-2026-12891
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