Buffer overflow in Xen
CVE-2018-5244
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.
Vulnerability class: Buffer Overflow
EPSS: 0.004 (29.8th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H.
Affected products
- Xen
- N/a — versions n/a
Weakness classification (CWE)
References
- cve@mitre.org (vendor-advisory, x_refsource_GENTOO)
- cve@mitre.org (VDB Entry, Third Party Advisory, vdb-entry, x_refsource_BID)
- cve@mitre.org (vdb-entry, x_refsource_SECTRACK)
- cve@mitre.org (x_refsource_CONFIRM, Mitigation, Issue Tracking, Vendor Advisory)
Frequently asked questions
- What is CVE-2018-5244?
- CVE-2018-5244 is a medium-severity vulnerability in Xen, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 6.5/10. Published 2018-01-05.
- How severe is CVE-2018-5244?
- Medium severity. CVSS v3 base score is 6.5 out of 10.