CVE-2026-68281

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description An issue exists in the DRM scheduler where the prepare job() callback incorrectly counts non-signaled native dependencies for jobs. Specifically, paired geometry and fragment jobs are submitted simultaneously, meaning the dependency between them cannot be verified before submission. This leads to an underestimation of the space remaining in the fragment CCCB (Command Control Center Block), which wrongly unblocks the run job() function. Consequently, the system may return early without writing the full sequence of commands to the CCCB, resulting in kernel warnings and potential job timeouts.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.