CVE-2021-29631

HIGH

FreeBSD Memory Corruption via VirtIO Device Model I/O Descriptor Handling

Title source: llm
STIX 2.1

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.

References (2)

Core 2
Core References
Third Party Advisory x_refsource_confirm
https://security.netapp.com/advisory/ntap-20210923-0004/

Scores

CVSS v3 7.8
EPSS 0.0005
EPSS Percentile 15.1%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Details

CWE
CWE-908
Status published
Products (3)
freebsd/freebsd 11.4 (14 CPE variants)
freebsd/freebsd 12.2 (11 CPE variants)
freebsd/freebsd 13.0 (4 CPE variants)
Published Aug 30, 2021
Tracked Since Feb 18, 2026