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CVE-2021-32843

Date: February 17, 2023

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.

Language: C

Severity Score

Related Resources (5)

https://nvd.nist.gov/vuln/detail/CVE-2021-32843
https://github.com/moby/hyperkit/commit/df0e46c7dbfd81a957d85e449ba41b52f6f7beb4
https://securitylab.github.com/advisories/GHSL-2021-054_057-moby-hyperkit/
https://github.com/moby/hyperkit/pull/313
https://www.mend.io/vulnerability-database/CVE-2021-32843

Severity Score

Weakness Type (CWE)

NULL Pointer Dereference

CWE-476

CVSS v3.1

Base Score:
Attack Vector (AV): LOCAL
Attack Complexity (AC): LOW
Privileges Required (PR): LOW
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): HIGH

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