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This bulletin was written by Vigil@nce : https://vigilance.fr/offer

SYNTHESIS OF THE VULNERABILITY

Impacted products: XenServer, Fedora, openSUSE Leap, SUSE Linux
Enterprise Desktop, SLES, Xen.

Severity: 2/4.

Consequences: denial of service on server, denial of service on
service.

Provenance: user shell.

Confidence: confirmed by the editor (5/5).

Creation date: 25/10/2018.

DESCRIPTION OF THE VULNERABILITY

An attacker, inside a guest system, can force a NULL pointer to be
dereferenced via Disabled Nested VT-x of Xen, in order to trigger
a denial of service on the host system.

ACCESS TO THE COMPLETE VIGIL@NCE BULLETIN

https://vigilance.fr/vulnerability/Xen-NULL-pointer-dereference-via-Disabled-Nested-VT-x-27614