This update for xen fixes the following issues: * CVE-2023-20588: AMD CPU transitional execution leak via division by zero . * CVE-2023-34322: top-level shadow reference dropped too early for 64-bit PV guests . * CVE-2023-34325: Multiple vulnerabilities in libfsimage disk handling . * CVE-2023-34326: x86/AMD: missing IOMMU TLB flushing . * CVE-2023-34327,CVE-2023-34328: x86/AMD: Debug Mask handling . * CVE-2023-46835: x86/AMD: mismatch in IOMMU quarantine page table levels . * CVE-2023-46836: x86: BTC/SRSO fixes not fully effective . * Upstream bug fixes ## Special Instructions and Notes: * Please reboot the system after installing this update.