Vulnerability identifier: #VU12648

Vulnerability risk: Low

CVSSv3.1: 7.7 [CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-10982

CWE-ID: CWE-190

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 or gain elevated privileges on the target system.

The weakness exists due to an array overrun condition that occurs when the High Precision Event Timer (HPET) timer is configured to deliver interrupts in IO-APIC mode. An adjacent attacker who has the HPET timer configured to deliver interrupts in IO-APIC mode can cause the service to crash or gain root privileges. 

Mitigation
Install update from vendor's website.

Vulnerable software versions

Xen: 4.6.0 - 4.10.0

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External links
http://xenbits.xen.org/xsa/advisory-261.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.