CVE-2022-23092

High

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.

SeverityHigh

CVSS8.8

Exploit probability—

Product

Freebsd

PublishedFeb 15, 2024

First seenFeb 15, 2024

Weakness typeCWE-787Out-of-bounds write

How to fix

Vendor advisories

security.freebsd.org/advisories/FreeBSD-SA-22:12.lib9p.asc

Affected products

Product	Affected versions	Fixed in
freebsd freebsd	13.0, 13.1	—

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