Alexey Kardashevskiy

**Name of the Vulnerable Software and Affected Versions** Linux kernel versions through 5.13.5 **Description** The issue allows KVM guest OS users to cause host OS memory corruption via `rtas args.nargs`. This is related to a potential buffer overflow in the `arch/powerpc/kvm/book3s rtas.c` driver of the Linux kernel on the powerpc platform. **Recommendations** For Linux kernel versions through 5.13.5, consider updating to a version that includes a fix for this issue to prevent host OS memory corruption. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

**Name of the Vulnerable Software and Affected Versions** Linux kernel (affected versions not specified) **Description** The issue is related to a leak in `kvm arch vcpu ioctl` `vcpu load` due to `vcpu put` not being called if the user copy fails. This can result in preempt notifier corruption and crashes, among other issues. **Recommendations** At the moment, there is no information about a newer version that contains a fix for this vulnerability.