Critical severity · published Dec 10, 2021
CVE-2021-38917
IBM PowerVM Hypervisor FW860, FW940, and FW950 could allow an attacker that gains service access to the FSP can read and write arbitrary host system memory through a series of…
9.1
CVSS
1.6%
EPSS
No
On KEV
Description
IBM PowerVM Hypervisor FW860, FW940, and FW950 could allow an attacker that gains service access to the FSP can read and write arbitrary host system memory through a series of carefully crafted service procedures. IBM X-Force ID: 210018.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.6% · higher than 75% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
PH
Powervm Hypervisor · Ibm
fw860; fw940; fw950 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-38917
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-38917
VDB Entry
https://exchange.xforce.ibmcloud.com/vulnerabilities/210018
Vendor Advisory
https://www.ibm.com/support/pages/node/6525010
More from Powervm Hypervisor
9.8
CVE-2022-34331
After performing a sequence of Power FW950, FW1010 maintenance operations a SRIOV network adapter can be improperly configured leading to desired VEPA configuration being…
8.8
CVE-2023-30438
An internally discovered vulnerability in PowerVM on IBM Power9 and Power10 systems could allow an attacker with privileged user access to a logical partition to perform an…
8.4
CVE-2026-11885
Power System update in Buffer Copy
8.2
CVE-2026-96262
IBM Power Systems Firmware Buffer Overflow
8.2
CVE-2026-96263
IBM Power Systems Firmware Buffer Overflow