Denial of Service Vulnerability in Xen's Memory Balloon Calculation

Denial of Service Vulnerability in Xen's Memory Balloon Calculation

CVE-2015-7972 · LOW Severity

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

The (1) libxl_set_memory_target function in tools/libxl/libxl.c and (2) libxl__build_post function in tools/libxl/libxl_dom.c in Xen 3.4.x through 4.6.x do not properly calculate the balloon size when using the populate-on-demand (PoD) system, which allows local HVM guest users to cause a denial of service (guest crash) via unspecified vectors related to "heavy memory pressure."

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