6.5med
CVE-2018-5244
In Xen 4.10, new infrastructure was introduced as part of an overhaul to how MSR emulation happens for guests.
Published 8 y ago · modified 4 mo ago · JSON
CVSS
6.5
v3.0 · NVD
CISA KEV
No
not known exploited
EPSS
0.4%
percentile 31%
Public exploits
0
none known
Summary
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.
Exploit prediction (EPSS)
0.37% probability of exploitation in the next 30 days, higher than 31% of all scored CVEs.
CVSS scores
| Assigned by | Version | Score | Vector |
|---|---|---|---|
| NVD | 3.0 | 6.5 | CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H |
| NVD | 2.0 | 4.9 | AV:L/AC:L/Au:N/C:N/I:N/A:C |
Classification
- Weakness
- CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer
References
- security.gentoo.org /glsa/201810-06 · vendor-advisory, x_refsource_GENTOO, x_transferred
- securityfocus.com /bid/102433 · vdb-entry, x_refsource_BID, x_transferred
- securitytracker.com /id/1040774 · vdb-entry, x_refsource_SECTRACK, x_transferred
- xenbits.xen.org /xsa/advisory-253.html · x_refsource_CONFIRM, x_transferred
Sources
- CVE List: CVE-2018-5244
- NVD: CVE-2018-5244
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