Vulnerability 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 Score
6.5
MEDIUM
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Xen | Xen | <= 4.10.0 |
| Debian | Debian Linux | 9.0 |
Related Weaknesses (CWE)
References
- http://www.securityfocus.com/bid/103174
- http://www.securitytracker.com/id/1040773
- https://lists.debian.org/debian-lts-announce/2018/03/msg00003.htmlThird Party Advisory
- 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-4131Third Party Advisory
- https://xenbits.xen.org/xsa/advisory-252.htmlVendor Advisory
- http://www.securityfocus.com/bid/103174
- http://www.securitytracker.com/id/1040773
- https://lists.debian.org/debian-lts-announce/2018/03/msg00003.htmlThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2018/11/msg00013.html
- https://security.gentoo.org/glsa/201810-06
- https://support.citrix.com/article/CTX232096
FAQ
What is CVE-2018-7540?
CVE-2018-7540 is a vulnerability with a CVSS score of 6.5 (MEDIUM). 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.
How severe is CVE-2018-7540?
CVE-2018-7540 has been rated MEDIUM with a CVSS base score of 6.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2018-7540?
Check the references section above for vendor advisories and patch information. Affected products include: Xen Xen, Debian Debian Linux.