CVE-2020-17376
Only deployments allowing host-based connections (for instance, root and ephemeral devices) are affected.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (1.73%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
An issue was discovered in Guest.migrate in virt/libvirt/guest.py in OpenStack Nova before 19.3.1, 20.x before 20.3.1, and 21.0.0. By performing a soft reboot of an instance that has previously undergone live migration, a user may gain access to destination host devices that share the same paths as host devices previously referenced by the virtual machine on the source host. This can include block devices that map to different Cinder volumes at the destination than at the source. Only deployments allowing host-based connections (for instance, root and ephemeral devices) are affected.
- CVSS 3.1
- 8.3 HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L
- EPSS
- 1.73% probability · 77th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-611
- Affected
- openstack/nova
- Source
- cve@mitre.org
EPSS 1.7% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- http://www.openwall.com/lists/oss-security/2020/08/25/4Mailing List, Patch, Third Party Advisory
- https://launchpad.net/bugs/1890501Exploit, Third Party Advisory
- https://security.openstack.org/ossa/OSSA-2020-006.htmlPatch, Vendor Advisory
- http://www.openwall.com/lists/oss-security/2020/08/25/4Mailing List, Patch, Third Party Advisory
- https://launchpad.net/bugs/1890501Exploit, Third Party Advisory
- https://security.openstack.org/ossa/OSSA-2020-006.htmlPatch, Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.