Advisory Published
Updated

CVE-2018-19965

First published: Sat Dec 08 2018(Updated: )

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.

Credit: cve@mitre.org

Affected SoftwareAffected VersionHow to fix
debian/xen
4.11.4+107-gef32c7afa2-1
4.14.6-1
4.14.5+94-ge49571868d-1
4.17.1+2-gb773c48e36-1
4.17.2+55-g0b56bed864-1
Xen Xen<=4.11.1
Citrix XenServer=7.0
Citrix XenServer=7.1-cu1
Citrix XenServer=7.5
Citrix XenServer=7.6
Debian Debian Linux=9.0

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Frequently Asked Questions

  • What is CVE-2018-19965 vulnerability?

    It is a vulnerability in Xen through 4.11.x that allows 64-bit PV guest OS users to cause a denial of service (host OS crash) due to an incorrect Meltdown (CVE-2017-5754) mitigation.

  • What is the severity of CVE-2018-19965?

    The severity of CVE-2018-19965 vulnerability is medium with a severity value of 5.6.

  • How does CVE-2018-19965 affect Xen?

    CVE-2018-19965 affects Xen versions up to 4.11.x and allows 64-bit PV guest OS users to crash the host OS.

  • How can I fix CVE-2018-19965 vulnerability in Xen?

    To fix CVE-2018-19965 vulnerability in Xen, update to versions 4.11.4+107-gef32c7afa2-1, 4.14.6-1, 4.14.5+94-ge49571868d-1, 4.17.1+2-gb773c48e36-1, or 4.17.2+55-g0b56bed864-1 depending on your Debian distribution.

  • Where can I find more information about CVE-2018-19965 vulnerability?

    You can find more information about CVE-2018-19965 vulnerability in Xen in the advisory published at https://xenbits.xen.org/xsa/advisory-279.txt.

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