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Xen 4.1.6.1 released

I am pleased to announce the release of Xen 4.1.6.1. This is available immediately from its git repository xenbits.xen.org (tag RELEASE-4.1.6.1) or from the Xen Project download pages.

Note that 4.1.6 did not get released, as a build issue was found late in the release process, when the 4.1.6 version number was already irreversibly applied.

Xen 4.1.6.1 is a maintenance release in the 4.1 series and contains: We recommend that all users of Xen 4.1.5 upgrade to Xen 4.1.6.1.

This release fixes the following critical vulnerabilities:

  • CVE-2013-1918 / XSA-45: Several long latency operations are not preemptible
  • CVE-2013-1952 / XSA-49: VT-d interrupt remapping source validation flaw for bridges
  • CVE-2013-2076 / XSA-52: Information leak on XSAVE/XRSTOR capable AMD CPUs
  • CVE-2013-2077 / XSA-53: Hypervisor crash due to missing exception recovery on XRSTOR

  • CVE-2013-2078 / XSA-54: Hypervisor crash due to missing exception recovery on XSETBV
  • CVE-2013-2194, CVE-2013-2195, CVE-2013-2196 / XSA-55: Multiple vulnerabilities in libelf PV kernel handling
  • CVE-2013-2072 / XSA-56: Buffer overflow in xencontrol Python bindings affecting xend
  • CVE-2013-2211 / XSA-57: libxl allows guest write access to sensitive console related xenstore keys
  • CVE-2013-1432 / XSA-58: Page reference counting error due to XSA-45/CVE-2013-1918 fixes
  • XSA-61: libxl partially sets up HVM passthrough even with disabled iommu

This release contains many bug fixes and improvements. The highlights are:

  • addressing a regression from the fix for XSA-21
  • addressing a regression from the fix for XSA-46
  • bug fixes to low level system state handling, including certain hardware errata workarounds

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