What’s Vulnerable › Vulnerabilities

CVE-2026-12891: Gstreamer1-plugins-bad-free: gstreamer1-plugins-bad: global buffer overflow (oob read) in h.266/vvc vui parameter parser

• Severity: medium (CVSS 4.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-06-23 · updated 2026-07-01
• Weakness: CWE-125

Description

A flaw was found in the GStreamer gst-plugins-bad package. When processing a malformed H.266/VVC video stream with a crafted aspect ratio indicator value, the H.266 parser performs an out-of-bounds read of up to 8 bytes from adjacent memory. This flaw allows an attacker to craft a malicious H.266 video file or stream that, when processed by a GStreamer-based application, could leak limited memory contents through video metadata, potentially exposing sensitive information from the application's address space.

Affected products

• GStreamer: all versions
• Red Hat Enterprise Linux: 8.0, 9.0, 10.0

References

• https://access.redhat.com/security/cve/CVE-2026-12891
• https://bugzilla.redhat.com/show_bug.cgi?id=2491318
• https://gitlab.freedesktop.org/gstreamer/gstreamer/-/work_items/5109

Get alerted when CVE-2026-12891 or the next vulnerability affects your stack