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Vulnerability record · CVE-2016-4962 · published 7 June 2016

CVE-2016-4962: Oracle vm server permissions and access controls vulnerability

Oracle · Vm Server

The libxl device-handling in Xen 4.6.x and earlier allows local OS guest administrators to cause a denial of service (resource consumption or management facility confusion) or gain host OS privileges by manipulating information in guest controlled areas of xenstore.

6.7 CVSS 3.0 Medium EPSS 0.40% · top 68.5% CWE-264 · Permissions and access controls
6.7CVSS 3.0 base score, v2 6.8
0.40%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
10References
17 Jun 2026Last modified by NVD

Description

The libxl device-handling in Xen 4.6.x and earlier allows local OS guest administrators to cause a denial of service (resource consumption or management facility confusion) or gain host OS privileges by manipulating information in guest controlled areas of xenstore.

CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://www.debian.org/security/2016/dsa-3633
http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html Vendor Advisory
http://www.securityfocus.com/bid/91006
http://www.securitytracker.com/id/1036023 Third Party AdvisoryVDB Entry
http://xenbits.xen.org/xsa/advisory-175.html Vendor Advisory
http://www.debian.org/security/2016/dsa-3633
http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html Vendor Advisory
http://www.securityfocus.com/bid/91006
http://www.securitytracker.com/id/1036023 Third Party AdvisoryVDB Entry
http://xenbits.xen.org/xsa/advisory-175.html Vendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

10.0CVE-2017-10912Xen vulnerabilityXen through 4.8.x mishandles page transfer, which allows guest OS users to obtain privileged host OS access, aka XSA-217.EPSS 2.7%10.0CVE-2017-10918Xen improper input validation vulnerabilityXen through 4.8.x does not validate memory allocations during certain P2M operations, which allows guest OS users to obtain privileged host OS access…EPSS 3.7%10.0CVE-2017-10920Xen memory buffer overflow vulnerabilityThe grant-table feature in Xen through 4.8.x mishandles a GNTMAP_device_map and GNTMAP_host_map mapping, when followed by only a GNTMAP_host_map unma…EPSS 2.5%10.0CVE-2017-10921Xen memory buffer overflow vulnerabilityThe grant-table feature in Xen through 4.8.x does not ensure sufficient type counts for a GNTMAP_device_map and GNTMAP_host_map mapping, which allows…EPSS 2.5%10.0CVE-2015-8104Xen vulnerabilityThe KVM subsystem in the Linux kernel through 4.2.6, and Xen 4.3.x through 4.6.x, allows guest OS users to cause a denial of service (host OS panic o…EPSS 2.5%9.9CVE-2017-2620Qemu out-of-bounds write vulnerabilityQuick emulator (QEMU) before 2.8 built with the Cirrus CLGD 54xx VGA Emulator support is vulnerable to an out-of-bounds access issue. The issue could…EPSS 3.6%9.9CVE-2018-12892Debian linux information exposure vulnerabilityAn issue was discovered in Xen 4.7 through 4.10.x. libxl fails to pass the readonly flag to qemu when setting up a SCSI disk, due to what was probabl…EPSS 2.5%9.8CVE-2025-58142Xen vulnerability[This CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.] There are multiple i…EPSS 0.47%

Source: NIST National Vulnerability Database (record CVE-2016-4962), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.