CVE-2022-23092

Name: CVE-2022-23092
Creator: NVD / NIST
Published: 2024-02-15T06:15:45.19+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.8/10EPSS 0.65%

Last modified Jun 17, 2026

CVE-2022-23092 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. 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. EPSS estimates a 0.65% chance of exploitation in the next 30 days.

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

8.8/10

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

EPSS Probability

0.65%

46.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-787

Affected Software

Vendor	Product	Versions	Update
Freebsd	Freebsd	13.0	Beta1
Freebsd	Freebsd	13.1	B1-P1

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
Status: Analyzed

Frequently Asked Questions

What is CVE-2022-23092?

How severe is CVE-2022-23092?

CVE-2022-23092 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 0.65% probability of exploitation in the next 30 days.

How do I fix CVE-2022-23092?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2022-23092?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST