CVE-2026-80722

Received Received - Intake

Wi-Fi TWT Setup Validation Flaw in Linux Kernel

Publication date: 2026-08-28

Last updated on: 2026-08-29

Assigner: kernel.org

Description

In the Linux kernel, the following vulnerability has been resolved: wifi: mac80211: validate individual TWT params before driver setup ieee80211_process_rx_twt_action() only partially validates a received S1G TWT setup frame before queueing it. An individual agreement can therefore reach ieee80211_s1g_rx_twt_setup() with twt->length too short for the full struct ieee80211_twt_params. The individual path passes twt to drv_add_twt_setup(). Both the tracepoint and the driver callback consume the complete parameters block, not merely req_type. Do not pass a short individual agreement to the driver. Broadcast agreements remain unchanged because they are rejected locally after accessing only req_type. [edit commit message to not overclaim lack of validation nor understate driver impact]

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-08-28

Last Modified

2026-08-29

Generated

2026-09-17

AI Q&A

2026-08-28

EPSS Evaluated

2026-09-15

NVD

CVE-2026-80722

EUVD

EUVD-2026-67457

Affected Vendors & Products

Vendor	Product	Version / Range
linux	linux_kernel	*

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-UNKNOWN

Attack-Flow Graph

Executive Summary

This vulnerability in the Linux kernel involves insufficient validation of individual TWT (Target Wake Time) parameters in received S1G TWT setup frames. The function ieee80211_process_rx_twt_action() does not fully validate the frame before passing it to the driver, potentially allowing a short agreement to reach ieee80211_s1g_rx_twt_setup() with an incomplete parameters block.

Detection Guidance

This vulnerability is specific to the Linux kernel's WiFi subsystem and requires kernel-level inspection. Detection involves checking kernel logs for malformed TWT setup frames or monitoring for unusual WiFi driver behavior. Use commands like dmesg | grep mac80211 or journalctl -k | grep TWT to search for related errors. Ensure your kernel is updated to a patched version.

Impact Analysis

This vulnerability could allow an attacker within Wi-Fi range to send maliciously crafted TWT setup frames, potentially causing undefined behavior in the kernel or driver. This might lead to system instability, crashes, or unexpected behavior in Wi-Fi operations.

Compliance Impact

This vulnerability does not directly affect compliance with GDPR, HIPAA, or similar standards as it pertains to a specific Wi-Fi protocol implementation in the Linux kernel. No evidence suggests data privacy or security control failures that would violate these regulations.

Mitigation Strategies

Update the Linux kernel to the latest patched version to resolve this vulnerability. Monitor vendor advisories for kernel updates and apply them promptly.

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