CVE-2021-29795 Denial of service in PowerVM Hypervisor

What is CVE-2021-29795?

CVE-2021-29795 is a medium-severity denial of service vulnerability in IBM PowerVM Hypervisor, published on 21 Sep 2021. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

IBM PowerVM Hypervisor FW860, FW930, FW940, and FW950 could allow a local user to create a specially crafted sequence of hypervisor calls from a partition that could crash the system. IBM X-Force ID: 203557.

Weakness: CWE-74

Which versions are affected by CVE-2021-29795?

It affects 1 product.

Products include Ibm Powervm Hypervisor.

How do I fix CVE-2021-29795?

No fix has been published for CVE-2021-29795 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-2021-29795 being exploited?

There is no known exploitation of CVE-2021-29795 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-jc84-3h2h-pgxj.