An issue (known as XSA-212) was discovered in Xen, with fixes available for 4.8.x, 4.7.x, 4.6.x, 4.5.x, and 4.4.x. The earlier XSA-29 fix introduced an insufficient check on XENMEM_exchange input, allowing the caller to drive hypervisor memory accesses outside of the guest provided input/output arrays.

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Affected package information

Release Package Patched in
devel xen 4.9.0-0ubuntu2
trusty xen 4.4.2-0ubuntu0.14.04.11
xenial xen 4.6.5-0ubuntu1.1
yakkety xen 4.7.2-0ubuntu1.2
zesty xen 4.8.0-1ubuntu2.1


Release Package Reason
precise xen ignored
precise/esm xen DNE
vivid/ubuntu-core xen DNE
vivid/stable-phone-overlay xen DNE

Needs Triage

Release Package Reason
upstream xen needs-triage