MEDIUM
xen: x86 CMPXCHG8B emulation fails to ignore operand size override (XSA-200)
Published Jan 26, 2017
5.0
MEDIUMCVSS 3.0
EPSS 0.42%
Description
CMPXCHG8B emulation in Xen 3.3.x through 4.7.x on x86 systems allows local HVM guest OS users to obtain sensitive information from host stack memory via a "supposedly-ignored" operand size prefix.
Affected products
No data.
OR
- 3.3.0
- 3.3.1
- 3.3.2
- 3.4.0
- 3.4.1
- 3.4.2
- 3.4.3
- 3.4.4
- 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
- 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
- 4.6.3
- 4.7.0
No data.
Red Hat Enterprise Linux 5
xen
Will not fix
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 5 | xen | Will not fix | 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.
3.3 LOW NVD
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality Impact Low
Integrity Impact None
Availability Impact None
1 other source (Red Hat) ▾
5.0 MEDIUM Red Hat
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N
Attack Vector Network
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Changed
Confidentiality Impact Low
Integrity Impact None
Availability Impact None
2.1 LOW NVD
AV:L/AC:L/Au:N/C:P/I:N/A:N
Access Vector Local
Access Complexity Low
Authentication None
Confidentiality Impact Partial
Integrity Impact None
Availability Impact None
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
0.42% 0.00421
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
EPSS probability 0.00421
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 | 0.42% (0.00421) | 34.10th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.42% (0.00424) | 33.68th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.07% (0.00069) | 18.64th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.06% (0.00061) | 27.95th | v3 (v2023.03.01) |
| Jun 7, 2024 | 0.06% (0.00061) | 25.86th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.06% (0.00061) | 23.86th | 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 (10)
- http://www.debian.org/security/2017/dsa-3847 vendor-advisoryx_refsource_DEBIAN
- http://www.securityfocus.com/bid/94863 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- http://www.securitytracker.com/id/1037468 vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry
- http://xenbits.xen.org/xsa/advisory-200.html x_refsource_CONFIRMPatchVendor Advisory
- https://access.redhat.com/security/cve/CVE-2016-9932 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1399745 Issue Tracking
- https://nvd.nist.gov/vuln/detail/CVE-2016-9932
- https://security.gentoo.org/glsa/201612-56 vendor-advisoryx_refsource_GENTOO
- https://support.citrix.com/article/CTX219378 x_refsource_CONFIRMVendor Advisory
- https://www.cve.org/CVERecord?id=CVE-2016-9932
| Link | Providers | Tags |
|---|---|---|
| http://www.debian.org/security/2017/dsa-3847 | vendor-advisoryx_refsource_DEBIAN | |
| http://www.securityfocus.com/bid/94863 | vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry | |
| http://www.securitytracker.com/id/1037468 | vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry | |
| http://xenbits.xen.org/xsa/advisory-200.html | x_refsource_CONFIRMPatchVendor Advisory | |
| https://access.redhat.com/security/cve/CVE-2016-9932 | Vendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1399745 | Issue Tracking | |
| https://nvd.nist.gov/vuln/detail/CVE-2016-9932 | ||
| https://security.gentoo.org/glsa/201612-56 | vendor-advisoryx_refsource_GENTOO | |
| https://support.citrix.com/article/CTX219378 | x_refsource_CONFIRMVendor Advisory | |
| https://www.cve.org/CVERecord?id=CVE-2016-9932 |
Change history (0)
No recorded changes yet.
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner mitre
Published Jan 26, 2017
Updated Aug 6, 2024
Reserved Dec 12, 2016
Link CVE-2016-9932
CISA Vulnrichment
Updated n/a