Security Advisory
CVE-2021-4095
CVE vulnerability detail — eXtreme Datacenter Security Operations
Description
A NULL pointer dereference was found in the Linux kernels KVM when dirty ring logging is enabled without an active vCPU context. An unprivileged local attacker on the host may use this flaw to cause a kernel oops condition and thus a denial of service by issuing a KVM_XEN_HVM_SET_ATTR ioctl. This flaw affects Linux kernel versions prior to 5.17-rc1.