SB2020013123 - Race condition in Linux kernel
Published: January 31, 2020 Updated: June 1, 2020
Security Bulletin ID
SB2020013123
Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Information disclosure
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Race condition (CVE-ID: CVE-2019-3016)
The vulnerability allows a local authenticated user to gain access to sensitive information.
In a Linux KVM guest that has PV TLB enabled, a process in the guest kernel may be able to read memory locations from another process in the same guest. This problem is limit to the host running linux kernel 4.10 with a guest running linux kernel 4.16 or later. The problem mainly affects AMD processors but Intel CPUs cannot be ruled out.
Remediation
Install update from vendor's website.
References
- https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.19.103
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.19
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.5.3
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.6
- https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.19.119