CVE-2021-32843: Null Pointer Dereference
First published: Fri Feb 17 2023(Updated: )
HyperKit is a toolkit for embedding hypervisor capabilities in an application. In versions 0.20210107 and prior of HyperKit, `virtio.c` has is a call to `vc_cfgread` that does not check for null which when called makes the host crash. This issue may lead to a guest crashing the host causing a denial of service. This issue is fixed in commit df0e46c7dbfd81a957d85e449ba41b52f6f7beb4.
Credit: security-advisories@github.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Mobyproject Hyperkit | <=0.20210107 |
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Reference Links
Frequently Asked Questions
What is CVE-2021-32843?
CVE-2021-32843 is a vulnerability in HyperKit, a toolkit for embedding hypervisor capabilities in an application.
What is the severity of CVE-2021-32843?
The severity of CVE-2021-32843 is medium with a CVSS score of 5.5.
How does CVE-2021-32843 affect HyperKit?
CVE-2021-32843 affects HyperKit versions 0.20210107 and prior, potentially allowing a guest to crash the host and cause denial of service.
How can I fix CVE-2021-32843?
To fix CVE-2021-32843, update HyperKit to a version that includes the fix, such as the commit df0e46c7dbfd81a957d85e449ba41b52f6f7beb4 or the pull request 313 in the GitHub repository.
Are there any additional resources for CVE-2021-32843?
Yes, you can find more information about CVE-2021-32843 in the security advisory GHSL-2021-054_057-moby-hyperkit on the GitHub Security Lab website.
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