What is CVE-2017-10915?

CVE-2017-10915 is a critical-severity vulnerability in Xen, classified under Concurrent Execution using Shared Resource with Improper Synchronization (Race Condition). CVSS score: 9.0/10. Published 2017-07-05.

How severe is CVE-2017-10915?

Critical severity. CVSS v3 base score is 9.0 out of 10.

Vulnerability in Xen

CVE-2017-10915

The shadow-paging feature in Xen through 4.8.x mismanages page references and consequently introduces a race condition, which allows guest OS users to obtain Xen privileges, aka XSA-219.

Vulnerability class: Race Condition

Published 2017-07-05 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.0 (Critical). Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.017 (75.9th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 76th percentile — 75.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.017 · newest: 0.017 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-362 — Concurrent Execution using Shared Resource with Improper Synchronization (Race Condition)

References

security.gentoo.org/glsa/201708-03 (vendor-advisory)
www.debian.org/security/2017/dsa-3969 (vendor-advisory)
www.securityfocus.com/bid/99174 (VDB Entry, Third Party Advisory, vdb-entry)
xenbits.xen.org/xsa/advisory-219.html (Mailing List, Mitigation, Vendor Advisory)
security.gentoo.org/glsa/201710-17 (vendor-advisory)

Frequently asked questions

What is CVE-2017-10915?: CVE-2017-10915 is a critical-severity vulnerability in Xen, classified under Concurrent Execution using Shared Resource with Improper Synchronization (Race Condition). CVSS score: 9.0/10. Published 2017-07-05.
How severe is CVE-2017-10915?: Critical severity. CVSS v3 base score is 9.0 out of 10.