Buffer overflow in FreeBSD
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.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.007 (49.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 49th percentile — 49.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000
Affected products
- FreeBSD — versions 13.1, 13.0-RELEASE, 13.1-RELEASE
Weakness classification (CWE)
Public proof-of-concept exploits
References
- security.freebsd.org/advisories/FreeBSD-SA-22:12.lib9p.asc (vendor-advisory, Vendor Advisory)
- security.netapp.com/advisory/ntap-20240415-0009/ (Third Party Advisory)
Frequently asked questions
- What is CVE-2022-23092?
- CVE-2022-23092 is a high-severity vulnerability in FreeBSD, classified under Out-of-bounds Write. CVSS score: 8.8/10. Published 2024-02-15.
- How severe is CVE-2022-23092?
- High severity. CVSS v3 base score is 8.8 out of 10.
- Is CVE-2022-23092 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.