CVE-2026-98185
Received Received - Intake

Buffer Overflow in Linux Kernel mwifiex WiFi Driver

Publication date: 2026-10-06

Last updated on: 2026-10-06

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: wifi: mwifiex: validate scan response extents mwifiex_ret_802_11_scan() subtracts the fixed response fields and the firmware-provided BSS length from resp->size without first proving that either extent fits. A short response or oversized BSS length can therefore underflow tlv_buf_size and make the TLV parser walk beyond the command response. Compute the fixed extent from the selected normal or background scan response. Validate that the fixed fields and BSS data fit before deriving the TLV extent and entering the parser.

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Meta Information

Published
2026-10-06
Last Modified
2026-10-06
Generated
2026-10-06
AI Q&A
2026-10-06
EPSS Evaluated
N/A
NVD
CVE-2026-98185
EUVD
EUVD-2026-93113

Affected Vendors & Products

Showing 9 associated CPEs
Vendor Product Version / Range
Linux Linux 5e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4e
Linux Linux 5e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4e
Linux Linux 5e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4e
Linux Linux 5e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4e
Linux Linux 5e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4e
Linux Linux 5e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4e
Linux Linux 5e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4e
Linux Linux 5e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4e
Linux Linux 3.0

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Exploitability

CWE
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KEV
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CWE ID Description
CWE-UNKNOWN

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Executive Summary

This vulnerability in the Linux kernel's mwifiex Wi-Fi driver allows a short or malformed scan response from a firmware to cause an integer underflow. This underflow can trick the driver into parsing memory outside the intended response buffer, potentially leading to memory corruption or crashes.

Impact Analysis

If exploited, this flaw could cause system instability, crashes, or unexpected behavior on devices using the affected mwifiex Wi-Fi driver. Attackers on the same network might trigger it via crafted Wi-Fi packets, leading to denial of service or privilege escalation.

Mitigation Strategies

Update the Linux kernel to the latest stable version that includes the fix for this vulnerability. Monitor vendor advisories for patches and apply them promptly.

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