xen: non-maskable interrupts triggerable by guests (xsa120)
Published Apr 13, 2016
6.5
MEDIUMCVSS 3.1
EPSS 0.38%
Description
Xen allows guest OS users to obtain sensitive information from uninitialized locations in host OS kernel memory by not enabling memory and I/O decoding control bits. NOTE: this vulnerability exists because of an incomplete fix for CVE-2015-0777.
Affected products
No data.
Configuration 2
- 5
No data.
Red Hat Enterprise Linux 5
kernel
Will not fix
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 5 | kernel | Will not fix | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
This issue does affect the Dom0 Xen kernel as shipped with Red Hat Enterprise Linux 5. Red Hat Enterprise Linux 5 is now in Production 3 Phase of the support and maintenance life cycle. This has been rated as having Moderate security impact and is not currently planned to be addressed in future updates. For additional information, refer to the Red Hat Enterprise Linux Life Cycle: https://access.redhat.com/support/policy/updates/errata/.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
AV:L/AC:L/Au:N/C:P/I:N/A:N
This CVE is not in the KEV list.
CISA SSVC (Vulnrichment)
Stakeholder-Specific Vulnerability Categorization from CISA ADP.
Exploitation
NoneAutomatable
NoTechnical Impact
PartialDecision
n/aAssessed May 26, 2026 · SSVC 2.0.3
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 (12 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 0.38% (0.00381) | 29.66th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.38% (0.00381) | 29.67th | v5 (v2026.06.15) |
| Mar 30, 2025 | 0.15% (0.00152) | 32.48th | v4 (v2025.03.14) |
| Mar 29, 2025 | 1.59% (0.01590) | 70.08th | v4 (v2025.03.14) |
| Mar 17, 2025 | 0.15% (0.00152) | 33.28th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.05% (0.00051) | 21.86th | v3 (v2023.03.01) |
| Jun 11, 2024 | 0.05% (0.00051) | 19.83th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.05% (0.00051) | 17.80th | v3 (v2023.03.01) |
| Mar 6, 2023 | 0.89% (0.00890) | 30.33th | v2 (v2022.01.01) |
| Sep 10, 2022 | 0.89% (0.00890) | 28.64th | v2 (v2022.01.01) |
| Apr 1, 2022 | 0.89% (0.00890) | 26.62th | v2 (v2022.01.01) |
| Feb 4, 2022 | 0.89% (0.00890) | 12.04th | v2 (v2022.01.01) |
References (7)
- http://xenbits.xen.org/xsa/advisory-120.html x_refsource_CONFIRMPatchVendor Advisory
- https://access.redhat.com/security/cve/CVE-2015-8553 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1196266 Issue Tracking
- https://nvd.nist.gov/vuln/detail/CVE-2015-8553
- https://seclists.org/bugtraq/2019/Aug/18 mailing-listx_refsource_BUGTRAQ
- https://www.cve.org/CVERecord?id=CVE-2015-8553
- https://www.debian.org/security/2019/dsa-4497 vendor-advisoryx_refsource_DEBIAN
| Link | Providers | Tags |
|---|---|---|
| http://xenbits.xen.org/xsa/advisory-120.html | x_refsource_CONFIRMPatchVendor Advisory | |
| https://access.redhat.com/security/cve/CVE-2015-8553 | Vendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1196266 | Issue Tracking | |
| https://nvd.nist.gov/vuln/detail/CVE-2015-8553 | ||
| https://seclists.org/bugtraq/2019/Aug/18 | mailing-listx_refsource_BUGTRAQ | |
| https://www.cve.org/CVERecord?id=CVE-2015-8553 | ||
| https://www.debian.org/security/2019/dsa-4497 | vendor-advisoryx_refsource_DEBIAN |
Change history (0)
No recorded changes yet.