CVE-2018-7540 Information

Description

An issue was discovered in Xen through 4.10.x allowing x86 PV guest OS users to cause a denial of service (host OS CPU hang) via non-preemptable L3/L4 pagetable freeing.

CVSS Vector

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

Reference

http://www.securityfocus.com/bid/103174 http://www.securitytracker.com/id/1040773 https://lists.debian.org/debian-lts-announce/2018/03/msg00003.html https://lists.debian.org/debian-lts-announce/2018/11/msg00013.html https://security.gentoo.org/glsa/201810-06 https://support.citrix.com/article/CTX232096 https://support.citrix.com/article/CTX232655 https://www.debian.org/security/2018/dsa-4131 https://xenbits.xen.org/xsa/advisory-252.html

Attack Complexity

LOW

Privileges Required

LOW

User Interaction Required

LOW

Scope

NONE

Confidentiality Impact

CHANGED

Integrity Impact

NONE

Availability Impact

NONE

Base Score

HIGH

Base Severity

6.5