Xen Hypervisor 4.1.3 Download

Welcome to the Xen 4.1.3 download page!

The Xen 4.1 release contains a number of important new features and updates including:

• A re-architected XL toolstack that is functionally nearly equivalent to XM/XEND
• Prototype credit2 scheduler designed for latency-sensitive workloads and very large systems
• CPU Pools for advanced partitioning
• Support for large systems (>255 processors and 1GB/2MB super page support)
• Support for x86 Advanced Vector eXtension (AVX)
• New Memory Access API enabling integration of 3rd party security solutions into Xen virtualized environments
• Even better stability through our new automated regression tests
• Xen 4.1 Release Notes
• Xen 4.1 Datasheet

Xen 4.1.3 is a maintenance release in the 4.1 series and contains:

• Fixes for the following critical vulnerabilities: We recommend all users of the 4.0 and 4.1 stable series to update to these latest point releases.
• CVE-2012-0217 / XSA-7: PV guest privilege escalation vulnerability
• CVE-2012-0218 / XSA-8: guest denial of service on syscall/sysenter exception generation
• CVE-2012-2934 / XSA-9: PV guest host Denial of Service
• CVE-2012-3432 / XSA-10: HVM guest user mode MMIO emulation DoS vulnerability
• CVE-2012-3433 / XSA-11: HVM guest destroy p2m teardown host DoS vulnerabilit
• Among many bug fixes and improvements (over 100 since Xen 4.1.2). Highlights are:
• Updates for the latest Intel/AMD CPU revisions
• Bug fixes and improvements to the libxl tool stack
• Bug fixes for IOMMU handling (device passthrough to HVM guests)
• Bug fixes for host kexec/kdump

It also contains the following fixes from earlier maintenance releases:

• Security fixes including CVE-2011-1583 and CVE-2011-1898
• Enhancements to guest introspection (VM single stepping support for very fine-grained access control)
• Many stability improvements, such as:
• PV-on-HVM stability fixes (fixing some IRQ issues)
• XSAVE cpu feature support for PV guests (allows safe use of latest multimedia instructions)
• RAS fixes for high availability
• fixes for offlining bad pages
• changes to libxc, mainly of benefit to libvirt
• New XL toolstack
• Debug support: kexec/kdump
• Remus (High Availability)
• Device passthrough to HVM guests
• Interrupt handling
• Support for Supervisor Mode Execution Protection (SMEP)
• Compatibility fixes for newer Linux guests, newer compilers, some old guest savefiles, newer Python, grub2, some hardware/BIOS bugs.

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tarball	Xen 4.1.3 (hypervisor and tools) official source distribution		signature