CVE-2017-10921
10.0
CRITICAL
CVSS 3.1
EPSS 1.1%
Description
The grant-table feature in Xen through 4.8.x does not ensure sufficient type counts for a GNTMAP_device_map and GNTMAP_host_map mapping, which allows guest OS users to cause a denial of service (count mismanagement and memory corruption) or obtain privileged host OS access, aka XSA-224 bug 2.
How to fix CVE-2017-10921
To remediate CVE-2017-10921, upgrade the affected package to a fixed version below.
- Alpine/xen—upgrade to 4.9.0-r0 or later
- —upgrade to 4.8.1-1+deb9u3 or later
Is CVE-2017-10921 being exploited?
Low — EPSS is 1.1%, meaning exploitation activity has not been observed at scale.
Affected packages (2)
- from 0, < 4.9.0-r0
- from 0, < 4.8.1-1+deb9u3
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | CRITICAL10.0 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H |