SB2020040416 - Race condition in xen (Alpine package)
Published: April 4, 2020
Security Bulletin ID
SB2020040416
Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Race condition (CVE-ID: CVE-2019-17346)
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
Install update from vendor's website.