Main Vulnerability Database Vulnerabilities #VU10778

NULL pointer dereference in Xen - CVE-2018-7542

Published: February 28, 2018 / Updated: July 28, 2020

Vulnerability identifier: #VU10778

CSH Severity: Low

CVSS v4: 7.1 [CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2018-7542

CWE-ID: CWE-476

Exploitation vector: Adjecent network

Exploit availability: No public exploit available

Vulnerability details

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

The vulnerability exists due to a NULL pointer dereference in multiple paths without the presence of a Local APIC. An adjacent attacker can crash the hypervisor and cause a denial of service.

Affected software

Xen
Fedora
xen

How to mitigate CVE-2018-7542

Install update from vendor's website.

xen - addressed in versions 4.8.3-3.fc26, 4.9.1-5.fc27

External References

http://xenbits.xen.org/xsa/advisory-256.html

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