Security update for xen

Open Source Vulnerabilities SUSE-SU-2022:2158-1

This update for xen fixes the following issues: - CVE-2022-26356: Fixed potential race conditions in dirty memory tracking that could cause a denial of service in the host (bsc#1197423). - CVE-2022-26357: Fixed a potential race condition in memory cleanup for hosts using VT-d IOMMU hardware, which could lead to a denial of service in the host (bsc#1197425). - CVE-2022-26358,CVE-2022-26359,CVE-2022-26360,CVE-2022-26361: Fixed various memory corruption issues for hosts using VT-d or AMD-Vi IOMMU hardware. These could be leveraged by an attacker to cause a denial of service in the host (bsc#1197426). - CVE-2022-26362: Fixed race condition in typeref acquisition (bsc#1199965) - CVE-2022-26363, CVE-2022-26364: Fixed insufficient care with non-coherent mappings (bsc#1199966)