HIGH
xen: x86: Mishandling of instruction pointer truncation during emulation
Published Sep 21, 2016
8.5
HIGHCVSS 3.0
EPSS 0.43%
Description
Xen 4.5.3, 4.6.3, and 4.7.x allow local HVM guest OS administrators to overwrite hypervisor memory and consequently gain host OS privileges by leveraging mishandling of instruction pointer truncation during emulation.
Affected products
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
8.2 HIGH NVD
CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required High
User Interaction None
Scope Changed
Confidentiality Impact High
Integrity Impact High
Availability Impact High
1 other source (Red Hat) ▾
8.5 HIGH Red Hat
CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
Attack Vector Network
Attack Complexity High
Privileges Required Low
User Interaction None
Scope Changed
Confidentiality Impact High
Integrity Impact High
Availability Impact High
7.2 HIGH NVD
AV:L/AC:L/Au:N/C:C/I:C/A:C
Access Vector Local
Access Complexity Low
Authentication None
Confidentiality Impact Complete
Integrity Impact Complete
Availability Impact Complete
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
0.43% 0.00425
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
EPSS probability 0.00425
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (10 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 0.43% (0.00425) | 34.41th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.43% (0.00428) | 33.95th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.06% (0.00059) | 15.75th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.06% (0.00062) | 28.60th | v3 (v2023.03.01) |
| Jun 13, 2024 | 0.06% (0.00062) | 26.61th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.06% (0.00062) | 24.59th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.03% (0.01034) | 41.69th | v2 (v2022.01.01) |
| Sep 10, 2022 | 1.03% (0.01034) | 39.91th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.03% (0.01034) | 37.91th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.03% (0.01034) | 20.32th | v2 (v2022.01.01) |
Weaknesses (1)
References (11)
- http://support.citrix.com/article/CTX216071 x_refsource_CONFIRMThird Party Advisory
- http://www.securityfocus.com/bid/92865 vdb-entryx_refsource_BID
- http://www.securitytracker.com/id/1036752 vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry
- http://xenbits.xen.org/xsa/advisory-186.html x_refsource_CONFIRMPatchVendor Advisory
- http://xenbits.xen.org/xsa/xsa186-0001-x86-emulate-Correct-boundary-interactions-of-emulate.patch x_refsource_CONFIRMPatchVendor Advisory
- https://access.redhat.com/security/cve/CVE-2016-7093 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1370322 Issue Tracking
- https://nvd.nist.gov/vuln/detail/CVE-2016-7093
- https://security.gentoo.org/glsa/201611-09 vendor-advisoryx_refsource_GENTOO
- https://www.cve.org/CVERecord?id=CVE-2016-7093
- https://xenbits.xen.org/xsa/advisory-186.html
| Link | Providers | Tags |
|---|---|---|
| http://support.citrix.com/article/CTX216071 | x_refsource_CONFIRMThird Party Advisory | |
| http://www.securityfocus.com/bid/92865 | vdb-entryx_refsource_BID | |
| http://www.securitytracker.com/id/1036752 | vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry | |
| http://xenbits.xen.org/xsa/advisory-186.html | x_refsource_CONFIRMPatchVendor Advisory | |
| http://xenbits.xen.org/xsa/xsa186-0001-x86-emulate-Correct-boundary-interactions-of-emulate.patch | x_refsource_CONFIRMPatchVendor Advisory | |
| https://access.redhat.com/security/cve/CVE-2016-7093 | Vendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1370322 | Issue Tracking | |
| https://nvd.nist.gov/vuln/detail/CVE-2016-7093 | ||
| https://security.gentoo.org/glsa/201611-09 | vendor-advisoryx_refsource_GENTOO | |
| https://www.cve.org/CVERecord?id=CVE-2016-7093 | ||
| https://xenbits.xen.org/xsa/advisory-186.html |
Change history (0)
No recorded changes yet.
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner mitre
Published Sep 21, 2016
Updated Aug 6, 2024
Reserved Aug 25, 2016
Link CVE-2016-7093
CISA Vulnrichment
Updated n/a