Security update for xen

Open Source Vulnerabilities SUSE-SU-2021:14848-1

This update for xen fixes the following issues: - CVE-2021-0089: Fixed Speculative Code Store Bypass (XSA-375) (bsc#1186433). - CVE-2021-20255: Fixed stack overflow via infinite recursion in eepro100 (bsc#1182654). - CVE-2021-28690: Fixed x86 TSX Async Abort protections not restored after S3 (XSA-377) (bsc#1186434). - CVE-2021-28692: Fixed inappropriate x86 IOMMU timeout detection / handling (XSA-373) (bsc#1186429). - CVE-2021-28697: Fixed grant table v2 status pages may remain accessible after de-allocation (XSA-379) (bsc#1189376). - CVE-2021-28698: Fixed long running loops in grant table handling. (XSA-380) (bsc#1189378). - CVE-2021-28701: Fixed race condition in XENMAPSPACE_grant_table handling (XSA-384) (bsc#1189632). - CVE-2021-28703: Fixed grant table v2 status pages may remain accessible after de-allocation (take two) (XSA-387) (bsc#1192555). - CVE-2021-28705, CVE-2021-28709: Fixed issues with partially successful P2M updates on x86 (XSA-389) (bsc#1192559). - CVE-2021-28706: Fixed guests may exceed their designated memory limit (XSA-385) (bsc#1192554). - CVE-2021-3527: Fixed unbounded stack allocation in usbredir (bsc#1186013). - CVE-2021-3592: Fixed invalid pointer initialization may lead to information disclosure in slirp (bootp) (bsc#1187369). - CVE-2021-3594: Fixed invalid pointer initialization may lead to information disclosure in slirp (udp) (bsc#1187378). - CVE-2021-3595: Fixed invalid pointer initialization may lead to information disclosure in slirp (tftp) (bsc#1187376). - CVE-2021-3682: Fixed free call on invalid pointer in usbredir bufp_alloc (bsc#1189150). - CVE-2021-3930: Fixed off-by-one error in mode_sense_page() in hw/scsi/scsi-disk.c (bsc#1192526).