The PowerVM Logical Partition Mobility(LPM) (PowerVM Hypervisor FW920, FW930, FW940, and…
Priority LOW 21Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- High
- User interaction
- None
- Attack complexity
- High
- Impact type
- —
- Confidentiality · integrity · availability
- High · None · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA.
Summary
The PowerVM Logical Partition Mobility(LPM) (PowerVM Hypervisor FW920, FW930, FW940, and FW950) encryption key exchange protocol can be compromised. If an attacker has the ability to capture encrypted LPM network traffic and is able to gain service access to the FSP they can use this information to perform a series of PowerVM service procedures to decrypt the captured migration traffic IBM X-Force ID: 198232
Why it matters now
EPSS 0.00546 45th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| IBM | PowerVM Hypervisor | FW920; FW930; FW940; FW950 | — | No fix listed | CNA |
- PowerVM Hypervisor VendorIBM Affected FW920; FW930; FW940; FW950 Fixed in — No fix listed CNA
CPE configurations NVD · 4
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:ibm:powervm_hypervisor:fw920:*:*:*:*:*:*:* | fw920 | Vulnerable | IBM |
| cpe:2.3:o:ibm:powervm_hypervisor:fw930:*:*:*:*:*:*:* | fw930 | Vulnerable | IBM |
| cpe:2.3:o:ibm:powervm_hypervisor:fw940:*:*:*:*:*:*:* | fw940 | Vulnerable | IBM |
| cpe:2.3:o:ibm:powervm_hypervisor:fw950:*:*:*:*:*:*:* | fw950 | Vulnerable | IBM |
- cpe:2.3:o:ibm:powervm_hypervisor:fw920:*:*:*:*:*:*:* Versions fw920 Vulnerable ·IBM
- cpe:2.3:o:ibm:powervm_hypervisor:fw930:*:*:*:*:*:*:* Versions fw930 Vulnerable ·IBM
- cpe:2.3:o:ibm:powervm_hypervisor:fw940:*:*:*:*:*:*:* Versions fw940 Vulnerable ·IBM
- cpe:2.3:o:ibm:powervm_hypervisor:fw950:*:*:*:*:*:*:* Versions fw950 Vulnerable ·IBM
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2021-20505
- 2026-10-03 Alias added: GHSA-mhgr-vqp5-q6x4
References
More IBM Powervm Hypervisor vulnerabilities
- TI-2022-15241 IBM Power FW security bypass CVSS 3.1CRITICAL 9.8
- TI-2023-14280 IBM PowerVM gain access CVSS 3.1CRITICAL 9.3
- TI-2021-16362 IBM PowerVM Hypervisor FW860, FW940, and FW950 could allow an attacker that gains service… CVSS 3.1CRITICAL 9.1
- TI-2021-16363 IBM PowerVM Hypervisor FW860, FW940, FW950, and FW1010, through a specific sequence of VM… CVSS 3.1HIGH 7.5
- TI-2023-14281 IBM PowerVM Hypervisor denial of service CVSS 3.1HIGH 7.9
- TI-2023-10961 IBM PowerVM Hypervisor information disclosure CVSS 3.1HIGH 7.5
Sources
- CVE-2021-20505 · CVE Program
- CVE-2021-20505 · NVD
- FIRST EPSS
- GHSA-mhgr-vqp5-q6x4 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences