CVE-2022-3628

Local privilege escalation via unchecked BSS index

Published Jan 12, 2023 · Updated Apr 8, 2025

Buffer overflow in the Broadcom Full MAC Wi-Fi driver in Linux kernel 6.1-rc5 allows local users to crash the system or gain privileges. brcmf_fweh_event_worker uses the USB-supplied emsg.bsscfgidx to access drvr->iflist without first checking the array bound. A malicious USB Wi-Fi device must supply the event; controlling execution additionally requires knowledge of the randomized kernel layout, while the overflow otherwise interrupts the system.

CVSS severity6.6
Medium
EPSS probability0.51%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Buffer overflow in the Broadcom Full MAC Wi-Fi driver in Linux kernel 6.1-rc5 allows local users to crash the system or gain privileges. brcmf_fweh_event_worker uses the USB-supplied emsg.bsscfgidx to access drvr->iflist without first checking the array bound. A malicious USB Wi-Fi device must supply the event; controlling execution additionally requires knowledge of the randomized kernel layout, while the overflow otherwise interrupts the system.

The record

CVE
CVE-2022-3628
Published
Jan 12, 2023
Updated
Apr 8, 2025
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-120, CWE-119, T1068
Attack vector
physical
Privileges
Unavailable

Timeline

How it unfolded

  1. Jan 12, 2023CVE publishedPublication date reported by the CVE source.
  2. Apr 8, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=Linux kernel 6.1-rc5

What conditions does exploitation require?

Attack vectorphysical
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linux Kernelversion=Linux kernel 6.1-rc5

Published CVSS scores

6.6CISA-ADPCVSS:3.1/AV:P/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
6.6NIST NVDCVSS:3.1/AV:P/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorphysical
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer
T1068Exploitation for Privilege Escalation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo