CVE-2026-68347

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

Description An issue exists in the AMD IOMMU driver regarding IRQ unsafe locking during guest domain (gdom) allocation. A lock dependency conflict occurs when a HARDIRQ-safe lock is held while attempting to acquire a HARDIRQ-unsafe lock. Specifically, the amd iommu domain flush pages() function requires the domain->lock to perform a flush, while the allocation process in gdom info load or alloc locked() and the IOMMU DESTROY free path use unsafe locking. This can lead to system instability or deadlocks when interacting with the xa->xa lock variable.

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