Denial of Service Vulnerability in Xen Hypervisor's REP MOVS Instruction Acceleration

CVE-2014-8867 · MEDIUM Severity

AV:L/AC:L/AU:N/C:N/I:N/A:C

The acceleration support for the "REP MOVS" instruction in Xen 4.4.x, 3.2.x, and earlier lacks properly bounds checking for memory mapped I/O (MMIO) emulated in the hypervisor, which allows local HVM guests to cause a denial of service (host crash) via unspecified vectors.

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