CVE-2022-23092

HighCVSS 8.8/10Last modified Jun 17, 2026

Description

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.

Metrics

CVSS 3.1 8.8/10CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-787

Affected software

Vendor	Product	Versions
FreeBSD	FreeBSD	>= 13.1-RELEASE, < p1; >= 13.0-RELEASE, < p12
freebsd	freebsd	>= 13.1-release, < p1; >= 13.0-release, < p12

References

https://security.freebsd.org/advisories/FreeBSD-SA-22:12.lib9p.ascVendor Advisory
https://security.netapp.com/advisory/ntap-20240415-0009/Third Party Advisory
https://security.freebsd.org/advisories/FreeBSD-SA-22:12.lib9p.ascVendor Advisory
https://security.netapp.com/advisory/ntap-20240415-0009/Third Party Advisory

Timeline

Published: Feb 15, 2024
Last modified: Jun 17, 2026
NVD status: Analyzed

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