vulnwire
7.8high

CVE-2016-3157

The __switch_to function in arch/x86/kernel/process_64.c in the Linux kernel does not properly context-switch IOPL on 64-bit PV Xen guests,…

Published 10 y ago · modified 4 mo ago · JSON

CVSS
7.8
v3.0 · NVD
CISA KEV
No
not known exploited
EPSS
0.5%
percentile 44%
Public exploits
0
none known

The __switch_to function in arch/x86/kernel/process_64.c in the Linux kernel does not properly context-switch IOPL on 64-bit PV Xen guests, which allows local guest OS users to gain privileges, cause a denial of service (guest OS crash), or obtain sensitive information by leveraging I/O port access.

Exploit prediction (EPSS)

0.51% probability of exploitation in the next 30 days, higher than 44% of all scored CVEs.

CVSS scores

Assigned byVersionScoreVector
NVD3.07.8CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD2.07.2AV:L/AC:L/Au:N/C:C/I:C/A:C

Classification

Weakness
  • CWE-264 Permissions, Privileges, and Access Controls

References

  • ubuntu.com /usn/USN-2971-2 · vendor-advisory, x_refsource_UBUNTU, x_transferred
  • xenbits.xen.org /xsa/advisory-171.html · x_refsource_CONFIRM, x_transferred
  • ubuntu.com /usn/USN-2970-1 · vendor-advisory, x_refsource_UBUNTU, x_transferred
  • oracle.com /technetwork/topics/security/linuxbulletinapr2016-2952096.html · x_refsource_CONFIRM, x_transferred
  • ubuntu.com /usn/USN-2969-1 · vendor-advisory, x_refsource_UBUNTU, x_transferred
  • ubuntu.com /usn/USN-2968-1 · vendor-advisory, x_refsource_UBUNTU, x_transferred
  • ubuntu.com /usn/USN-2971-3 · vendor-advisory, x_refsource_UBUNTU, x_transferred
  • ubuntu.com /usn/USN-2997-1 · vendor-advisory, x_refsource_UBUNTU, x_transferred
  • debian.org /security/2016/dsa-3607 · vendor-advisory, x_refsource_DEBIAN, x_transferred
  • ubuntu.com /usn/USN-2971-1 · vendor-advisory, x_refsource_UBUNTU, x_transferred
  • ubuntu.com /usn/USN-2996-1 · vendor-advisory, x_refsource_UBUNTU, x_transferred
  • ubuntu.com /usn/USN-2968-2 · vendor-advisory, x_refsource_UBUNTU, x_transferred
  • securitytracker.com /id/1035308 · vdb-entry, x_refsource_SECTRACK, x_transferred
  • securityfocus.com /bid/84594 · vdb-entry, x_refsource_BID, 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.