CVE-2016-3157 (GCVE-0-2016-3157)

Vulnerability from cvelistv5 – Published: 2016-04-12 16:00 – Updated: 2024-08-05 23:47
VLAI
Summary
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.
Severity
7.8 (High)
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE
  • n/a
Assigner
References
URL Tags
http://www.ubuntu.com/usn/USN-2971-2 vendor-advisoryx_refsource_UBUNTU
http://xenbits.xen.org/xsa/advisory-171.html x_refsource_CONFIRM
http://www.ubuntu.com/usn/USN-2970-1 vendor-advisoryx_refsource_UBUNTU
http://www.oracle.com/technetwork/topics/security… x_refsource_CONFIRM
http://www.ubuntu.com/usn/USN-2969-1 vendor-advisoryx_refsource_UBUNTU
http://www.ubuntu.com/usn/USN-2968-1 vendor-advisoryx_refsource_UBUNTU
http://www.ubuntu.com/usn/USN-2971-3 vendor-advisoryx_refsource_UBUNTU
http://www.ubuntu.com/usn/USN-2997-1 vendor-advisoryx_refsource_UBUNTU
http://www.debian.org/security/2016/dsa-3607 vendor-advisoryx_refsource_DEBIAN
http://www.ubuntu.com/usn/USN-2971-1 vendor-advisoryx_refsource_UBUNTU
http://www.ubuntu.com/usn/USN-2996-1 vendor-advisoryx_refsource_UBUNTU
http://www.ubuntu.com/usn/USN-2968-2 vendor-advisoryx_refsource_UBUNTU
http://www.securitytracker.com/id/1035308 vdb-entryx_refsource_SECTRACK
http://www.securityfocus.com/bid/84594 vdb-entryx_refsource_BID
Date Public
2016-03-16 00:00
Show details on NVD website
To clipboard 

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I/O.\"}],\"metrics\":{\"cvssMetricV30\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.0\",\"vectorString\":\"CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":7.8,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":5.9}],\"cvssMetricV2\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"2.0\",\"vectorString\":\"AV:L/AC:L/Au:N/C:C/I:C/A:C\",\"baseScore\":7.2,\"accessVector\":\"LOCAL\",\"accessComplexity\":\"LOW\",\"authentication\":\"NONE\",\"confidentialityImpact\":\"COMPLETE\",\"integrityImpact\":\"COMPLETE\",\"availabilityImpact\":\"COMPLETE\"},\"baseSeverity\":\"HIGH\",\"exploitabilityScore\":3.9,\"impactScore\":10.0,\"acInsufInfo\":false,\"obtainAllPrivilege\":false,\"obtainUserPrivilege\":false,\"obtainOtherPrivilege\":false,\"userInteractionRequired\":false}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-264\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:xen:xen:4.0.0:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"550223A9-B9F1-440A-8C25-9F0F76AF7301\"}]}]},{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:lts:*:*:*\",\"matchCriteriaId\":\"B6B7CAD7-9D4E-4FDB-88E3-1E583210A01F\"}]}]}],\"references\":[{\"url\":\"http://www.debian.org/security/2016/dsa-3607\",\"source\":\"cve@mitre.org\"},{\"url\":\"http://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html\",\"source\":\"cve@mitre.org\"},{\"url\":\"http://www.securityfocus.com/bid/84594\",\"source\":\"cve@mitre.org\"},{\"url\":\"http://www.securitytracker.com/id/1035308\",\"source\":\"cve@mitre.org\"},{\"url\":\"http://www.ubuntu.com/usn/USN-2968-1\",\"source\":\"cve@mitre.org\"},{\"url\":\"http://www.ubuntu.com/usn/USN-2968-2\",\"source\":\"cve@mitre.org\"},{\"url\":\"http://www.ubuntu.com/usn/USN-2969-1\",\"source\":\"cve@mitre.org\"},{\"url\":\"http://www.ubuntu.com/usn/USN-2970-1\",\"source\":\"cve@mitre.org\"},{\"url\":\"http://www.ubuntu.com/usn/USN-2971-1\",\"source\":\"cve@mitre.org\"},{\"url\":\"http://www.ubuntu.com/usn/USN-2971-2\",\"source\":\"cve@mitre.org\"},{\"url\":\"http://www.ubuntu.com/usn/USN-2971-3\",\"source\":\"cve@mitre.org\"},{\"url\":\"http://www.ubuntu.com/usn/USN-2996-1\",\"source\":\"cve@mitre.org\"},{\"url\":\"http://www.ubuntu.com/usn/USN-2997-1\",\"source\":\"cve@mitre.org\"},{\"url\":\"http://xenbits.xen.org/xsa/advisory-171.html\",\"source\":\"cve@mitre.org\",\"tags\":[\"Patch\",\"Vendor 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Advisory\"]}]}}",
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-06-28T07:21:21+00:00",
      "cve": "CVE-2016-3157",
      "id": "CVE-2016-3157",
      "initial_release_date": "2016-03-16T00:00:00+00:00",
      "product_status:known_affected": "32",
      "product_status:known_not_affected": "56",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: xen: Privilege escalation on 64-bit Xen PV domains with IO port access privileges (XSA-171)",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2016/cve-2016-3157.json",
      "version": "3"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.