Security Bulletin: The PowerVM hypervisor can violate the isolation between peer VMs in certain scenarios

Summary

A specific sequence of VM management operations from the management console (HMC, Novalink, or PowerVC) can lead to a violation of the isolation between peer VMs.

Vulnerability Details

CVEID:CVE-2021-38918
**DESCRIPTION:**IBM PowerVM Hypervisor through a specific sequence of VM management operations could lead to a violation of the isolation between peer VMs.
CVSS Base score: 8.6
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/210019 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N)

Affected Products and Versions

Remediation/Fixes

Customers with the products below should install FW860.A2(860_236), FW940.50(940_095), FW950.30(950_092), FW1010.01(1010_69) or newer to remediate this concern.

Power 8

1. IBM Power System S812 (8284-21A)

2. IBM Power System S822 (8284-22A)

3. IBM Power System S814 (8286-41A)

4. IBM Power System S824 (8286-42A)

5. IBM Power System E850 (8408-E8E)

6. IBM Power System E850C (8408-44E)

7. IBM Power System E870 (9119-MME)

8. IBM Power System E880 (9119-MHE)

9. IBM Power System E870C (9080-MME)

10. IBM Power System E880C (9080-MHE)

Power 9

1. IBM Power System S922 (9009-22A, 9009-22G)

2. IBM Power System H922 (9223-22H, 9223-22S)

3. IBM Power System S914 (9009-41A, 9009-41G)

4. IBM Power System S924 (9009-42A, 9009-42G)

5. IBM Power System H924 (9223-42H, 9223-42S)

6. IBM Power System E950 (9040-MR9)

7. IBM Power System E980 (9080-M98, 9080-M9S)

Power 10

1. IBM Power System E1080 (9080-HEX)

Workarounds and Mitigations

None