CVE-2026-98328
Received Received - Intake

Buffer Overflow in Linux Kernel 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: mac80211: add HE 6 GHz capability in the scan elems len The HE 6 GHz Band Capability element is in the probe request for every band if 6 GHz is supported, so add the size to scan_ies_len. Otherwise, building probe request elements can fail, triggering the WARN_ON in __ieee80211_start_scan().

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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-2026-98328
EUVD
EUVD-2026-93313

Affected Vendors & Products

Showing 7 associated CPEs
Vendor Product Version / Range
Linux Linux 2ad2274c58ee2dcaf9ccde5c63ff30f59b138f77
Linux Linux 2ad2274c58ee2dcaf9ccde5c63ff30f59b138f77
Linux Linux 2ad2274c58ee2dcaf9ccde5c63ff30f59b138f77
Linux Linux 2ad2274c58ee2dcaf9ccde5c63ff30f59b138f77
Linux Linux 2ad2274c58ee2dcaf9ccde5c63ff30f59b138f77
Linux Linux 2ad2274c58ee2dcaf9ccde5c63ff30f59b138f77
Linux Linux 5.8

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Exploitability

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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 relates to the mac80211 subsystem handling Wi-Fi scanning. It involves the HE 6 GHz Band Capability element in probe requests. If the size for this element is not properly accounted for in scan_ies_len, it can cause probe request building to fail and trigger a kernel warning.

Detection Guidance

This vulnerability is specific to the Linux kernel's mac80211 subsystem and relates to HE 6 GHz capability handling in scan elements. Detection requires checking the kernel version and mac80211 module behavior. Use 'uname -a' to check kernel version and 'modprobe mac80211' to verify module status. Monitor kernel logs for WARN_ON messages during probe requests.

Impact Analysis

This vulnerability may cause Wi-Fi scanning to fail on affected systems, potentially leading to unstable or interrupted wireless network connections. Users might experience connectivity issues or reduced performance when using Wi-Fi.

Mitigation Strategies

Update the Linux kernel to a patched version that includes the fix for this issue. Check your distribution's security updates or apply the upstream kernel patch. If immediate patching isn't possible, monitor network interfaces for scan failures and disable 6 GHz band support temporarily if feasible.

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