This update for xen fixes the following issues: - CVE-2021-28701: Fixed race condition in XENMAPSPACE_grant_table handling . - CVE-2021-28694,CVE-2021-28695,CVE-2021-28696: Fixed IOMMU page mapping issues on x86 . - CVE-2021-28697: Fixed grant table v2 status pages that may remain accessible after de-allocation . - CVE-2021-28698: Fixed long running loops in grant table handling . - CVE-2021-20255: Fixed eepro100 stack overflow via infinite recursion . - CVE-2021-3592: Fixed invalid pointer initialization may lead to information disclosure . - CVE-2021-3594: Fixed invalid pointer initialization may lead to information disclosure . - CVE-2021-3595: Fixed invalid pointer initialization may lead to information disclosure . - CVE-2021-28692: Fixed inappropriate x86 IOMMU timeout detection / handling . - CVE-2021-0089: Fixed Speculative Code Store Bypass . - CVE-2021-28690: Fixed x86 TSX Async Abort protections not restored after S3 . - Prevent superpage allocation in the LAPIC and ACPI_INFO range .