CVE-2018-19965

low-risk
Published 2018-12-08

An issue was discovered in Xen through 4.11.x allowing 64-bit PV guest OS users to cause a denial of service (host OS crash) because #GP[0] can occur after a non-canonical address is passed to the TLB flushing code. NOTE: this issue exists because of an incorrect CVE-2017-5754 (aka Meltdown) mitigation.

Do I need to act?

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0.18% chance of exploitation
EPSS score — low exploit probability
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
5
CVSS 5.6/10 Medium
LOCAL / HIGH complexity

Affected Products (6)

Xen

Affected Vendors

Debian Citrix Xen

References (12)

http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00072.html
Third Party Advisory http://www.securityfocus.com/bid/106182
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro...
Patch https://support.citrix.com/article/CTX239432
Third Party Advisory https://www.debian.org/security/2019/dsa-4369
Mitigation https://xenbits.xen.org/xsa/advisory-279.html
http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00072.html
Third Party Advisory http://www.securityfocus.com/bid/106182
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro...
Patch https://support.citrix.com/article/CTX239432
Third Party Advisory https://www.debian.org/security/2019/dsa-4369
Mitigation https://xenbits.xen.org/xsa/advisory-279.html
29
/ 100
low-risk
Severity 15/34 · Moderate
Exploitability 1/34 · Minimal
Exposure 13/34 · Low