CVE-2021-38918
IBM PowerVM Hypervisor FW860, FW940, FW950, and FW1010, through a specific sequence of VM...
IBM PowerVM Hypervisor FW860, FW940, FW950, and FW1010, through a specific sequence of VM management operations could lead to a violation of the isolation between peer VMs. IBM X-Force ID: 210019.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- None
- Availability
- None
Exploit likelihood
What each source reports
CVE List Score used
IBM PowerVM Hypervisor FW860, FW940, FW950, and FW1010, through a specific sequence of VM management operations could lead to a violation of the isolation between peer VMs. IBM X-Force ID: 210019.
- Record
CVE-2021-38918- CVSS 3.0
- 8.6 High
CVSS:3.0/I:N/AC:L/AV:N/UI:N/C:H/A:N/S:C/PR:N/RC:C/RL:O/E:U - Updated
- 2026-11-02
EUVDEUVD-2021-25355
IBM PowerVM Hypervisor FW860, FW940, FW950, and FW1010, through a specific sequence of VM management operations could lead to a violation of the isolation between peer VMs. IBM X-Force ID: 210019.
- Record
EUVD-2021-25355- CVSS 3.0
- 8.6 High
CVSS:3.0/I:N/AC:L/AV:N/UI:N/C:H/A:N/S:C/PR:N/RC:C/RL:O/E:U - Updated
- 2026-11-03
GitHub AdvisoriesGHSA-m8m5-5pw5-3xr7 No score
IBM PowerVM Hypervisor FW860, FW940, FW950, and FW1010, through a specific sequence of VM...
IBM PowerVM Hypervisor FW860, FW940, FW950, and FW1010, through a specific sequence of VM management operations could lead to a violation of the isolation between peer VMs. IBM X-Force ID: 210019.
- Record
GHSA-m8m5-5pw5-3xr7- Updated
- 2026-11-02
NVD
IBM PowerVM Hypervisor FW860, FW940, FW950, and FW1010, through a specific sequence of VM management operations could lead to a violation of the isolation between peer VMs. IBM X-Force ID: 210019.
- Record
CVE-2021-38918- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - CVSS 3.0
- 8.6 High
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N - CVSS 2.0
- 5.0 Medium
AV:N/AC:L/Au:N/C:P/I:N/A:N - Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases, published | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-38918 is a high vulnerability (CVSS 8.6) in Ibm Powervm Hypervisor, published January 5, 2022. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.25%, the 69th percentile. No source names a fixed version.