Vulnerability identifier: #VU16002

Vulnerability risk: Low

CVSSv3.1: 5.7 [CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-19961

CWE-ID: CWE-264

Exploitation vector: Local network

Exploit availability: No

Vulnerable software:
Xen
Server applications / Virtualization software

Vendor: Xen Project

Description
The vulnerability allows an adjacent attacker to cause DoS condition on the target system.

The weakness exists due to insufficient TLB flushing after improper large page mappings with AMD IOMMUs. An adjacent attacker can cause the service to crash.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Xen: 4.7.0 - 4.11.0

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External links
http://xenbits.xen.org/xsa/advisory-275.html

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the local network (LAN).

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.