CVE-2022-23092

Missing bounds check in 9p message handling

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.

Category

8.8
CVSS
Severity: High
CVSS 3.1 •
EPSS 0.13%
Vendor Advisory freebsd.org
Affected: FreeBSD FreeBSD
Published at:
Updated at:

References

Link Tags
https://security.freebsd.org/advisories/FreeBSD-SA-22:12.lib9p.asc vendor advisory
https://security.netapp.com/advisory/ntap-20240415-0009/

Frequently Asked Questions

What is the severity of CVE-2022-23092?
CVE-2022-23092 has been scored as a high severity vulnerability.
How to fix CVE-2022-23092?
To fix CVE-2022-23092, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2022-23092 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2022-23092 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2022-23092?
CVE-2022-23092 affects FreeBSD FreeBSD.
This platform uses data from the NIST NVD, MITRE CVE, MITRE CWE, First.org and CISA KEV but is not endorsed or certified by these entities. CVE is a registred trademark of the MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. CWE is a registred trademark of the MITRE Corporation and the authoritative source of CWE content is MITRE's CWE web site.
© 2025 Under My Watch. All Rights Reserved.