Vulnerability Details CVE-2022-23092
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.002
EPSS Ranking 45.5%
CVSS Severity
CVSS v3 Score 8.8
References