CVE-2022-23092: Freebsd

High severity, CVSS 8.8. EPSS: 0.7% chance of exploitation in the next 30 days.

The implementation of lib9p's handling of RWALK messages was missing a bounds check needed when unpacking the message contents. The missing check means that the receipt of a specially crafted message will cause lib9p to overwrite unrelated memory. The bug can be triggered by a malicious bhyve guest kernel to overwrite memory in the bhyve(8) process. This could potentially lead to user-mode code execution on the host, subject to bhyve's Capsicum sandbox.

Affected products

• Freebsd Freebsd: version 13.0 only; version 13.1 only

Published 2024-02-15. Last modified 2026-06-17.