DEBIAN-CVE-2023-46842

Unlike 32-bit PV guests, HVM guests may switch freely between 64-bit and other modes. This in particular means that they may set registers used to pass 32-bit-mode hypercall arguments to values outside of the range 32-bit code would be able to set them to. When processing of hypercalls takes a...

Fedora 32 : kernel (2021-8d45d297c6)

The remote Fedora 32 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2021-8d45d297c6 advisory. - An issue was discovered in the Linux kernel 3.11 through 5.10.16, as used by Xen. To service requests to the PV backend, the driver maps grant...

Upgrading to Ubuntu 14.04, RHEL 7 and CentOS 7 Guests

Customers who wish to upgrade existing Linux guests to versions which now operate in HVM mode that is, RHEL7, CentOS 7, and Ubuntu 14.04 should perform an in-guest upgrade. At this point, the upgraded Guest will only run in PV mode - which is not supported and has known issues. Customers should r...

Xen security advisories XSA-1 8 2, and XSA-1 8 3-may be caused by a virtual machine penetration-vulnerability warning-the black bar safety net

Today the Xen Update 2 important patch announcement XSA-1 8 2, and XSA-1 8 3,wherein the XSA-1 8 2 can be caused directly by the virtual machine penetration,recommends the use of Xen PV mode the Cloud Platform as soon as possible to update the patch. XSA-1 8 2 description of the problem: Xen PV...