Linux Kernel IOMMU RISC-V NULL Pointer Dereference Vulnerability

A null pointer dereference vulnerability has been identified in the Linux kernel's IOMMU RISC-V implementation. The issue arises in the 'riscv_iommu_iova_to_phys()' function, which fails to properly handle NULL returns from the 'riscv_iommu_pte_fetch()' function. This oversight can lead to a null pointer dereference, causing potential instability or crashes. The vulnerability affects the Linux kernel stable tree.

Impact

Exploitation of this vulnerability leads to a null pointer dereference, causing a crash or instability in the system.

Remediation

Users can upgrade to the latest version of the Linux kernel stable tree to address this vulnerability.