#VU17901 Race condition in Xen - CVE-2019-17346
Published: March 5, 2019 / Updated: July 28, 2020
Vulnerability identifier: #VU17901
Vulnerability risk: Low
CVSSv4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:U/U:Clear
CVE-ID: CVE-2019-17346
CWE-ID: CWE-362
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerable software:
Xen
Xen
Software vendor:
Xen Project
Xen Project
Description
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a race condition when processing TLB flushing on PCID-enabled guest system. A local user of guest operating system can crash a hosts system or execute arbitrary code on other guests.
Only x86 systems with at least one PCID-enabled PV guest are vulnerable.
Remediation
Apply patches: