CVE-2026-100229: gst-plugins-bad1.0 Out-of-bounds Write

Vulnerability summary

CVE-2026-100229 is a medium (CVSS 6.5) Out-of-bounds Write vulnerability in gst-plugins-bad1.0. EPSS estimates a 0.36% chance of exploitation in the next 30 days, higher than 28.8% of scored vulnerabilities.

Timeline

1. 14-10-2026
   PublishedVulnerability first disclosed.
2. 14-10-2026
   Last modifiedVulnerability information updated.

Description

A flaw was found in GStreamer's H.266 codec parser library (libgstcodecparsers). An out-of-bounds write vulnerability exists in the DCI parsing function, where a reserved field value is incorrectly accepted, causing the parser to write beyond the bounds of an internal structure. An attacker could exploit this by providing a specially crafted H.266 bitstream to a third-party application that uses this library API, potentially causing a crash or memory corruption. No standard GStreamer pipeline element currently invokes the affected code path.

• CWE-787Out-of-bounds WriteThe product writes data past the end, or before the beginning, of the intended buffer.