A flaw was found in KVM. When updating a guest’s page table entry, vm_pgoff was improperly used as the offset to get the page’s pfn. As vaddr and vm_pgoff are controllable by user-mode processes, this flaw allows unprivileged local users on the host to write outside the userspace region and potentially corrupt the kernel, resulting in a denial of service condition.
[
{
"vendor": "n/a",
"product": "kernel",
"versions": [
{
"version": "kernel 5.18",
"status": "affected"
}
]
}
]