CVE-2020-29570
6.2
MEDIUM
CVSS 3.1
EPSS 0.06%
Description
An issue was discovered in Xen through 4.14.x. Recording of the per-vCPU control block mapping maintained by Xen and that of pointers into the control block is reversed. The consumer assumes, seeing the former initialized, that the latter are also ready for use. Malicious or buggy guest kernels can mount a Denial of Service (DoS) attack affecting the entire system.
How to fix CVE-2020-29570
To remediate CVE-2020-29570, upgrade the affected package to a fixed version below.
- —upgrade to 4.13.2-r3 or later
- —upgrade to 4.14.0+88-g1d1d1f5391-1 or later
Is CVE-2020-29570 being exploited?
Low — EPSS is 0.1%, meaning exploitation activity has not been observed at scale.
Affected packages (2)
- from 0, < 4.13.2-r3
- from 0, < 4.14.0+88-g1d1d1f5391-1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM6.2 | CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |