CVE-2021-32844

low-risk
Published 2023-02-17

HyperKit is a toolkit for embedding hypervisor capabilities in an application. In versions 0.20210107 and prior of HyperKit, ` vi_pci_write` has is a call to `vc_cfgwrite` 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 451558fe8aaa8b24e02e34106e3bb9fe41d7ad13.

Do I need to act?

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0.06% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
6
CVSS 6.2/10 Medium
LOCAL / LOW complexity

Affected Products (1)

Hyperkit

Affected Vendors

Mobyproject

References (6)

Patch https://github.com/moby/hyperkit/commit/451558fe8aaa8b24e02e34106e3bb9fe41d7ad13
Patch https://github.com/moby/hyperkit/pull/313
Third Party Advisory https://securitylab.github.com/advisories/GHSL-2021-054_057-moby-hyperkit/
Patch https://github.com/moby/hyperkit/commit/451558fe8aaa8b24e02e34106e3bb9fe41d7ad13
Patch https://github.com/moby/hyperkit/pull/313
Third Party Advisory https://securitylab.github.com/advisories/GHSL-2021-054_057-moby-hyperkit/
25
/ 100
low-risk
Severity 20/34 · Moderate
Exploitability 0/34 · Minimal
Exposure 5/34 · Minimal