kernel: powerpc: guest can cause DoS on POWER9 KVM hosts

A flaw was found in the way Linux kernel running on the Power9 processor saves and restores its registers while going in and coming out of an idle state. The issue occurs when a guest kernel has Kernel Userspace Address Protection KUAP feature enabled. The idlebook3s function does not save and...

Important: Red Hat Security Advisory: redhat-release-virtualization-host and redhat-virtualization-host update

An update for redhat-release-virtualization-host and redhat-virtualization-host is now available for Red Hat Virtualization 4 for Red Hat Enterprise Linux 7 and Red Hat Virtualization 4.2 for Red Hat Enterprise Linux 7.6 EUS. Red Hat Product Security has rated this update as having a security...

kernel: vhost-net: guest to host kernel escape during migration

A buffer overflow flaw was found in the way Linux kernel's vhost functionality that translates virtqueue buffers to IOVs, logged the buffer descriptors during migration. A privileged guest user able to pass descriptors with invalid length to the host when migration is underway, could use this fla...