CVE-2026-68329

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

Description A logical race condition exists in the AMD IOMMU implementation within the iommu completion wait() function. The issue occurs because the need sync flag is read without a lock and can return early when false, even if previously queued commands have not yet completed in the hardware. In multi-CPU scenarios, this allows a CPU to proceed and potentially free page-table pages while the IOMMU is still using stale translations, creating a use-after-free window.

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