xen: x86 task switch to VM86 mode mis-handled (XSA-192)
Published Jan 23, 2017
7.8
HIGHCVSS 3.0
EPSS 0.45%
Description
Xen 4.0.x through 4.7.x mishandle x86 task switches to VM86 mode, which allows local 32-bit x86 HVM guest OS users to gain privileges or cause a denial of service (guest OS crash) by leveraging a guest operating system that uses hardware task switching and allows a new task to start in VM86 mode.
Affected products
No data.
Configuration 1
- 4.0.0
- 4.0.1
- 4.0.2
- 4.0.3
- 4.0.4
- 4.1.0
- 4.1.1
- 4.1.2
- 4.1.3
- 4.1.4
- 4.1.5
- 4.1.6.1
- 4.2.0
- 4.2.1
- 4.2.2
- 4.2.3
- 4.2.4
- 4.2.5
- 4.3.0
- 4.3.1
- 4.3.2
- 4.3.3
- 4.3.4
- 4.4.0
- 4.4.1
- 4.4.2
- 4.4.3
- 4.4.4
- 4.5.0
- 4.5.1
- 4.5.2
- 4.5.3
- 4.5.5
- 4.6.0
- 4.6.1
- 4.6.3
- 4.6.4
- 4.7.0
- 4.7.1
No data.
Red Hat Enterprise Linux 5
xen
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 5 | xen | Not affected | n/a |
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
1 other source (Red Hat) ▾
CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
AV:L/AC:L/Au:N/C:P/I:P/A:P
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
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 | 0.45% (0.00452) | 36.96th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.45% (0.00448) | 35.46th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.09% (0.00094) | 24.22th | 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 | 0.95% (0.00950) | 32.28th | v2 (v2022.01.01) |
| Sep 10, 2022 | 0.95% (0.00950) | 30.63th | v2 (v2022.01.01) |
| Apr 1, 2022 | 0.95% (0.00950) | 28.61th | v2 (v2022.01.01) |
| Feb 4, 2022 | 0.95% (0.00950) | 13.46th | v2 (v2022.01.01) |
References (9)
- http://www.securityfocus.com/bid/94470 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- http://www.securitytracker.com/id/1037341 vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry
- http://xenbits.xen.org/xsa/advisory-192.html x_refsource_CONFIRMPatchVendor Advisory
- https://access.redhat.com/security/cve/CVE-2016-9382 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1392933 Issue Tracking
- https://nvd.nist.gov/vuln/detail/CVE-2016-9382
- https://security.gentoo.org/glsa/201612-56 vendor-advisoryx_refsource_GENTOO
- https://support.citrix.com/article/CTX218775 x_refsource_CONFIRMPatchThird Party Advisory
- https://www.cve.org/CVERecord?id=CVE-2016-9382
| Link | Providers | Tags |
|---|---|---|
| http://www.securityfocus.com/bid/94470 | vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry | |
| http://www.securitytracker.com/id/1037341 | vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry | |
| http://xenbits.xen.org/xsa/advisory-192.html | x_refsource_CONFIRMPatchVendor Advisory | |
| https://access.redhat.com/security/cve/CVE-2016-9382 | Vendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1392933 | Issue Tracking | |
| https://nvd.nist.gov/vuln/detail/CVE-2016-9382 | ||
| https://security.gentoo.org/glsa/201612-56 | vendor-advisoryx_refsource_GENTOO | |
| https://support.citrix.com/article/CTX218775 | x_refsource_CONFIRMPatchThird Party Advisory | |
| https://www.cve.org/CVERecord?id=CVE-2016-9382 |
Change history (0)
No recorded changes yet.