CVE-2026-68406
Received Received - Intake

Wi-Fi PMSR FTM Preamble Range Validation Bypass in Linux Kernel

Publication date: 2026-08-10

Last updated on: 2026-08-10

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: wifi: cfg80211: validate PMSR FTM preamble range PMSR FTM request parsing accepts preamble values outside the enumerated nl80211 preamble range. Reject out-of-range values before using them in the parser capability bit test using the policy. [drop unnecessary check]

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Meta Information

Published
2026-08-10
Last Modified
2026-08-10
Generated
2026-08-10
AI Q&A
2026-08-10
EPSS Evaluated
N/A
NVD
CVE-2026-68406
EUVD
EUVD-2026-55592

Affected Vendors & Products

Currently, no data is known.

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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 involves improper validation of PMSR FTM preamble range values in the wifi cfg80211 component. The parser accepts preamble values outside the defined nl80211 preamble range, which could lead to incorrect processing or potential security issues.

Detection Guidance

This vulnerability affects the Linux kernel's wifi configuration (cfg80211) and involves improper validation of PMSR FTM preamble ranges. Detection requires checking kernel versions and wifi driver behavior. No specific commands are provided in the context, but monitoring kernel logs for wifi-related errors or checking for out-of-range preamble values in network traffic may help identify exploitation attempts.

Impact Analysis

This vulnerability may allow attackers to send malformed wireless network requests, potentially causing system instability, crashes, or unauthorized access to network resources. Systems using affected Linux kernel versions could be at risk if not patched.

Mitigation Strategies

Apply the latest Linux kernel updates to patch the vulnerability. Monitor vendor advisories for specific kernel versions affected. Disable unnecessary wifi features if immediate patching is not possible. Ensure network monitoring for unusual preamble values in wifi traffic.

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