CVE-2026-43110
Awaiting Analysis Awaiting Analysis - Queue
Buffer Overflow in Linux Kernel WiFi Driver

Publication date: 2026-05-06

Last updated on: 2026-06-01

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: wifi: brcmfmac: validate bsscfg indices in IF events brcmf_fweh_handle_if_event() validates the firmware-provided interface index before it touches drvr->iflist[], but it still uses the raw bsscfgidx field as an array index without a matching range check. Reject IF events whose bsscfg index does not fit in drvr->iflist[] before indexing the interface array. [add missing wifi prefix]
CVSS Scores
EPSS Scores
Probability:
Percentile:
Meta Information
Published
2026-05-06
Last Modified
2026-06-01
Generated
2026-06-16
AI Q&A
2026-05-06
EPSS Evaluated
2026-06-15
NVD
CVE-2026-43110
EUVD
EUVD-2026-27630
Affected Vendors & Products
Showing 11 associated CPEs
Vendor Product Version / Range
linux linux_kernel 7.0
linux linux_kernel 7.0
linux linux_kernel 7.0
linux linux_kernel 7.0
linux linux_kernel 7.0
linux linux_kernel 7.0
linux linux_kernel 7.0
linux linux_kernel From 6.13 (inc) to 6.18.24 (exc)
linux linux_kernel From 6.19 (inc) to 6.19.14 (exc)
linux linux_kernel From 6.7 (inc) to 6.12.83 (exc)
linux linux_kernel From 3.9 (inc) to 6.6.136 (exc)
Helpful Resources
Exploitability
CWE
CWE Icon
KEV
KEV Icon
CWE ID Description
CWE-UNKNOWN
Attack-Flow Graph
AI Quick Actions
Instant insights powered by AI
Executive Summary

This vulnerability exists in the Linux kernel's wifi driver brcmfmac. Specifically, the function brcmf_fweh_handle_if_event() does not properly validate the bsscfg index before using it as an array index. Although it validates the firmware-provided interface index before accessing the iflist array, it still uses the raw bsscfgidx field without a proper range check. This can lead to improper indexing of the interface array.

Impact Analysis

Improper validation of the bsscfg index could potentially lead to out-of-bounds array access in the wifi driver. This might cause unexpected behavior such as crashes, memory corruption, or other stability issues in the Linux kernel's wifi subsystem.

Chat Assistant
Ask questions about this CVE
Hi! I’m here to help you understand CVE-2026-43110. Ask me anything about the vulnerability, its impact, or mitigation strategies.
0/70
EPSS Chart