7.1 High
CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
COMPLETE
AV:N/AC:M/Au:N/C:N/I:N/A:C
0.003 Low
EPSS
Percentile
67.9%
The do_mmu_update function in arch/x86/mm.c in Xen 3.2.x through 4.4.x does
not properly manage page references, which allows remote domains to cause a
denial of service by leveraging control over an HVM guest and a crafted
MMU_MACHPHYS_UPDATE.