xen: memory leak with MSR emulation (XSA-253)
Published Jan 5, 2018
6.5
MEDIUMCVSS 3.0
EPSS 0.37%
Description
In Xen 4.10, new infrastructure was introduced as part of an overhaul to how MSR emulation happens for guests. Unfortunately, one tracking structure isn't freed when a vcpu is destroyed. This allows guest OS administrators to cause a denial of service (host OS memory consumption) by rebooting many times.
Affected products
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:C/C:N/I:N/A:H
1 other source (Red Hat) ▾
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:L
AV:L/AC:L/Au:N/C:N/I:N/A:C
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
2021–2026- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
- EPSS v4
Percentile over time
- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
- EPSS v4
Table of values (10 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 0.37% (0.00371) | 28.68th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.38% (0.00378) | 29.39th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.06% (0.00059) | 15.51th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.06% (0.00059) | 26.93th | v3 (v2023.03.01) |
| May 25, 2024 | 0.06% (0.00059) | 24.81th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.06% (0.00059) | 22.80th | v3 (v2023.03.01) |
| Mar 6, 2023 | 0.95% (0.00950) | 32.28th | v2 (v2022.01.01) |
| Feb 4, 2022 | 0.95% (0.00950) | 13.46th | v2 (v2022.01.01) |
| Feb 3, 2022 | 1.29% (0.01294) | 30.79th | v5 (v2026.06.15) |
| Apr 14, 2021 | 1.29% (0.01294) | 0.00th | v1 |
References (8)
- http://www.securityfocus.com/bid/102433 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- http://www.securitytracker.com/id/1040774 vdb-entryx_refsource_SECTRACK
- https://access.redhat.com/security/cve/CVE-2018-5244 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1528602 Issue Tracking
- https://nvd.nist.gov/vuln/detail/CVE-2018-5244
- https://security.gentoo.org/glsa/201810-06 vendor-advisoryx_refsource_GENTOO
- https://www.cve.org/CVERecord?id=CVE-2018-5244
- https://xenbits.xen.org/xsa/advisory-253.html x_refsource_CONFIRMIssue TrackingMitigationVendor Advisory
| Link | Providers | Tags |
|---|---|---|
| http://www.securityfocus.com/bid/102433 | vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry | |
| http://www.securitytracker.com/id/1040774 | vdb-entryx_refsource_SECTRACK | |
| https://access.redhat.com/security/cve/CVE-2018-5244 | Vendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1528602 | Issue Tracking | |
| https://nvd.nist.gov/vuln/detail/CVE-2018-5244 | ||
| https://security.gentoo.org/glsa/201810-06 | vendor-advisoryx_refsource_GENTOO | |
| https://www.cve.org/CVERecord?id=CVE-2018-5244 | ||
| https://xenbits.xen.org/xsa/advisory-253.html | x_refsource_CONFIRMIssue TrackingMitigationVendor Advisory |
Change history (0)
No recorded changes yet.