CVE-2026-43214

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

Description An issue exists in the KVM x86 component where reading PDPTR registers in the get sregs2() function lacks proper SRCU read-side protection. Reading PDPTRs can trigger access to guest memory through a call chain involving kvm pdptr read(), svm cache reg(), load pdptrs(), kvm vcpu read guest page(), and kvm vcpu gfn to memslot(). The kvm vcpu gfn to memslot() function dereferences memslots via kvm memslots(), which requires either kvm->srcu or kvm->slots lock to be held. Because only vcpu->mutex is held during this operation, it triggers a lockdep warning due to suspicious RCU usage.

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