CVE-2022-50851

Name of the Vulnerable Software and Affected Versions Linux kernel versions prior to 6.0.0-rc1home lulu 2452 lulu7 vhost+

Description The Linux kernel contains a flaw within the vhost vdpa component related to unmapping large memory regions. During testing with vIOMMU, a crash could occur when a guest attempted to unmap very large memory areas. To address this, a new function, vhost vdpa general unmap(), was introduced to specifically handle unmapping memory saved in the iotlb. The issue manifests as an invalid opcode during the unmapping process, potentially leading to system instability. The vulnerable code path involves the intel iommu unmap pages(), iommu unmap(), iommu unmap(), and vhost vdpa unmap() functions.

Recommendations Update to a newer version of the Linux kernel that includes the fix for this vulnerability.