CVE-2018-7540
First published: Tue Feb 27 2018(Updated: )
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.
Credit: cve@mitre.org
| Affected Software | Affected Version | How 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-unstable | <=4.10.0 | |
| Debian GNU/Linux | =9.0 |
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Reference Links
- 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
- https://security-tracker.debian.org/tracker/CVE-2018-7540
Frequently Asked Questions
What is the severity of CVE-2018-7540?
CVE-2018-7540 is classified as a denial of service vulnerability affecting Xen.
How do I fix CVE-2018-7540?
To mitigate CVE-2018-7540, upgrade to Xen versions 4.11.4+107-gef32c7afa2-1 or later.
What systems are affected by CVE-2018-7540?
CVE-2018-7540 affects Xen versions up to 4.10.x and Debian Linux 9.0.
What type of attack does CVE-2018-7540 facilitate?
CVE-2018-7540 allows an x86 PV guest OS user to induce a host OS CPU hang.
Which platforms are impacted by CVE-2018-7540?
CVE-2018-7540 impacts platforms using Xen hypervisor, specifically in virtualized environments.
- collector/security-tracker-debian
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- agent/references
- collector/mitre-cve
- source/MITRE
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- agent/last-modified-date
- agent/description
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- agent/softwarecombine
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- agent/software-canonical-lookup-request
- package-manager/debian
- vendor/xen
- canonical/xen xen-unstable
- version/xen xen-unstable/4.10.0
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