vulnwire
8.5high

CVE-2016-1570

The PV superpage functionality in arch/x86/mm.c in Xen 3.4.0, 3.4.1, and 4.1.x through 4.6.x allows local PV guests to obtain sensitive inf…

Published 10 y ago · modified 4 mo ago · JSON

CVSS
8.5
v3.0 · NVD
CISA KEV
No
not known exploited
EPSS
1.2%
percentile 67%
Public exploits
0
none known

The PV superpage functionality in arch/x86/mm.c in Xen 3.4.0, 3.4.1, and 4.1.x through 4.6.x allows local PV guests to obtain sensitive information, cause a denial of service, gain privileges, or have unspecified other impact via a crafted page identifier (MFN) to the (1) MMUEXT_MARK_SUPER or (2) MMUEXT_UNMARK_SUPER sub-op in the HYPERVISOR_mmuext_op hypercall or (3) unknown vectors related to page table updates.

Exploit prediction (EPSS)

1.15% probability of exploitation in the next 30 days, higher than 67% of all scored CVEs.

CVSS scores

Assigned byVersionScoreVector
NVD3.08.5CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
NVD2.06.9AV:L/AC:M/Au:N/C:C/I:C/A:C

Classification

Weakness
  • CWE-20 Improper Input Validation

References

  • debian.org /security/2016/dsa-3519 · vendor-advisory, x_refsource_DEBIAN, x_transferred
  • securitytracker.com /id/1034744 · vdb-entry, x_refsource_SECTRACK, x_transferred
  • xenbits.xen.org /xsa/advisory-167.html · x_refsource_CONFIRM, x_transferred

Sources

vulnwire keeps one entry per vulnerability: the CVE id wins, then GHSA; records that alias each other are merged. Machine-readable: JSON.