CVE-2021-29631

Description

In FreeBSD 13.0-STABLE before n246941-20f96f215562, 12.2-STABLE before r370400, 11.4-STABLE before r370399, 13.0-RELEASE before p4, 12.2-RELEASE before p10, and 11.4-RELEASE before p13, certain VirtIO-based device models in bhyve failed to handle errors when fetching I/O descriptors. A malicious guest may cause the device model to operate on uninitialized I/O vectors leading to memory corruption, crashing of the bhyve process, and possibly arbitrary code execution in the bhyve process.

Category

7.8
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.05%
Vendor Advisory FreeBSD.org
Affected: n/a FreeBSD
Published at:
Updated at:

References

Link Tags
https://security.FreeBSD.org/advisories/FreeBSD-SA-21:13.bhyve.asc vendor advisory
https://security.netapp.com/advisory/ntap-20210923-0004/ third party advisory

Frequently Asked Questions

What is the severity of CVE-2021-29631?
CVE-2021-29631 has been scored as a high severity vulnerability.
How to fix CVE-2021-29631?
To fix CVE-2021-29631, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-29631 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2021-29631 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-29631?
CVE-2021-29631 affects n/a FreeBSD.
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