CVE-2018-19965

MEDIUM

Xen < 4.11.1 - Denial of Service via Non-Canonical Address TLB Flushing

Title source: llm

Description

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.

References (6)

Core 6

Core References

Patch, Third Party Advisory x_refsource_confirm

https://support.citrix.com/article/CTX239432

Mitigation, Patch, Vendor Advisory x_refsource_misc

https://xenbits.xen.org/xsa/advisory-279.html

Third Party Advisory vendor-advisory x_refsource_debian

https://www.debian.org/security/2019/dsa-4369

Third Party Advisory, VDB Entry vdb-entry x_refsource_bid

http://www.securityfocus.com/bid/106182

Mailing List, Third Party Advisory vendor-advisory x_refsource_fedora

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UXC6BME7SXJI2ZIATNXCAH7RGPI4UKTT/

Mailing List vendor-advisory x_refsource_suse

http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00072.html

Scores

CVSS v3 5.6

EPSS 0.0018

EPSS Percentile 39.1%

Attack Vector LOCAL

CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:C/C:N/I:N/A:H

Details

Status published

Products (6)

citrix/xenserver 7.0

citrix/xenserver 7.1 cu1

citrix/xenserver 7.5

citrix/xenserver 7.6

debian/debian_linux 9.0

xen/xen < 4.11.1

Published Dec 08, 2018

Tracked Since Feb 18, 2026