CVE-2021-38937 Denial of service in PowerVM Hypervisor

What is CVE-2021-38937?

CVE-2021-38937 is a medium-severity denial of service vulnerability in IBM PowerVM Hypervisor, published on 10 Dec 2021. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

IBM PowerVM Hypervisor FW940, FW950, and FW1010 could allow an authenticated user to cause the system to crash using a specially crafted IBMi Hypervisor call. IBM X-Force ID: 210894.

Which versions are affected by CVE-2021-38937?

It affects 1 product.

Products include Ibm Powervm Hypervisor.

How do I fix CVE-2021-38937?

No fix has been published for CVE-2021-38937 yet. Limit exposure of the affected software until one is available.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2021-38937 being exploited?

There is no known exploitation of CVE-2021-38937 in the wild and no public exploit code.

Other vulnerabilities in IBM PowerVM Hypervisor

• CVE-2023-30438 IBM PowerVM gain access Critical 9.3
• CVE-2021-38918 Security feature bypass in PowerVM Hypervisor High 8.6
• CVE-2022-22445 Privilege escalation in PowerVM Hypervisor High 7.6
• CVE-2021-38917 Privilege escalation in PowerVM Hypervisor High 7.4
• CVE-2025-36035 IBM PowerVM Hypervisor denial of service Medium 6.7

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-q983-m4fh-gqhm.