Security update for xen

Open Source Vulnerabilities SUSE-SU-2021:2955-1

This update for xen fixes the following issues: Security issues fixed: - CVE-2021-28698: long running loops in grant table handling (XSA-380)(bsc#1189378). - CVE-2021-28697: grant table v2 status pages may remain accessible after de-allocation (XSA-379)(bsc#1189376). - CVE-2021-28694,CVE-2021-28695,CVE-2021-28696: IOMMU page mapping issues on x86 (XSA-378)(bsc#1189373). - CVE-2021-28699: inadequate grant-v2 status frames array bounds check (XSA-382)(bsc#1189380). - CVE-2021-28692: xen: inappropriate x86 IOMMU timeout detection / handling (bsc#1186429) - CVE-2021-28690: xen: x86: TSX Async Abort protections not restored after S3 (bsc#1186434) - CVE-2021-0089: xen: Speculative Code Store Bypass (bsc#1186433) - CVE-2021-20255: Fixed stack overflow via infinite recursion in eepro100 (bsc#1182654) - CVE-2021-3592: slirp: invalid pointer initialization may lead to information disclosure (bootp)(bsc#1187369). - CVE-2021-3594: slirp: invalid pointer initialization may lead to information disclosure (udp)(bsc#1187378). - CVE-2021-3595: slirp: invalid pointer initialization may lead to information disclosure (tftp)(bsc#1187376). - CVE-2021-3308: Fixed IRQ vector leak on x86 (XSA-360)(bsc#1181254). - Prevent superpage allocation in the LAPIC and ACPI_INFO range (bsc#1189882).