CVE-2021-29631
moderate-risk
Published 2021-08-30
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.
Do I need to act?
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0.05% 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
7
CVSS 7.8/10
High
LOCAL
/ LOW complexity
Affected Products (20)
Affected Vendors
References (4)
Third Party Advisory
https://security.netapp.com/advisory/ntap-20210923-0004/
Third Party Advisory
https://security.netapp.com/advisory/ntap-20210923-0004/
46
/ 100
moderate-risk
Severity
24/34 · High
Exploitability
0/34 · Minimal
Exposure
22/34 · High