What is CVE-2019-17349?

CVE-2019-17349 is a medium-severity vulnerability in Xen, classified under Loop with Unreachable Exit Condition (Infinite Loop). CVSS score: 5.5/10. Published 2019-10-08.

How severe is CVE-2019-17349?

Medium severity. CVSS v3 base score is 5.5 out of 10.

Vulnerability in Xen

CVE-2019-17349

An issue was discovered in Xen through 4.12.x allowing Arm domU attackers to cause a denial of service (infinite loop) involving a LoadExcl or StoreExcl operation.

Published 2019-10-08 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.004 (27.0th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 27th percentile — 27.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000

Affected products

Xen
Debian Linux — versions 9.0, 10.0

Weakness classification (CWE)

CWE-835 — Loop with Unreachable Exit Condition (Infinite Loop)

References

xenbits.xen.org/xsa/advisory-295.html (Patch, Vendor Advisory)
xenbits.xen.org/xsa/advisory-295.html (Vendor Advisory)
www.debian.org/security/2020/dsa-4602 (vendor-advisory, Third Party Advisory)
seclists.org/bugtraq/2020/Jan/21 (mailing-list, Mailing List, Third Party Advisory)

Frequently asked questions

What is CVE-2019-17349?: CVE-2019-17349 is a medium-severity vulnerability in Xen, classified under Loop with Unreachable Exit Condition (Infinite Loop). CVSS score: 5.5/10. Published 2019-10-08.
How severe is CVE-2019-17349?: Medium severity. CVSS v3 base score is 5.5 out of 10.