Xen Vulnerability: XSA-212 - Insufficient Check on XENMEM_exchange Input

CVE-2017-7228 · HIGH Severity

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

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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