CVE-2026-68352

Received Received - Intake

Buffer Overflow in Linux Kernel Atheros ath6kl Driver

Publication date: 2026-08-10

Last updated on: 2026-08-19

Assigner: kernel.org

Description

In the Linux kernel, the following vulnerability has been resolved: wifi: ath6kl: fix OOB read from firmware IE lengths in connect event The firmware-controlled beacon_ie_len, assoc_req_len, and assoc_resp_len fields in ath6kl_wmi_connect_event_rx() are not validated against the buffer length. Their sum (up to 765) can exceed the actual WMI event data, causing out-of-bounds reads during IE parsing and state corruption of wmi->is_wmm_enabled. Add a check that the total IE length fits within the buffer.

CVSS Scores

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Meta Information

Published

2026-08-10

Last Modified

2026-08-19

Generated

2026-08-30

AI Q&A

2026-08-10

EPSS Evaluated

2026-08-29

NVD

CVE-2026-68352

EUVD

EUVD-2026-55453

Affected Vendors & Products

Vendor	Product	Version / Range
linux_kernel	ath6kl	*

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-UNKNOWN

Attack-Flow Graph

Executive Summary

This is a vulnerability in the Linux kernel's ath6kl Wi-Fi driver where firmware-controlled fields in a connect event are not properly validated. The beacon_ie_len, assoc_req_len, and assoc_resp_len fields can exceed the actual event data buffer, leading to out-of-bounds reads during information element (IE) parsing. This may corrupt the wmi->is_wmm_enabled state.

Detection Guidance

This vulnerability involves out-of-bounds reads in the Linux kernel's ath6kl WiFi driver due to unvalidated firmware-controlled IE lengths. Detection requires checking kernel logs for ath6kl-related errors or crashes during WiFi operations. Monitor logs with 'dmesg | grep ath6kl' or 'journalctl -k | grep ath6kl' for suspicious events.

Impact Analysis

An attacker within Wi-Fi range could exploit this to cause a denial-of-service (system crash) or potentially execute arbitrary code on affected systems using the ath6kl driver. Systems relying on this driver for Wi-Fi connectivity are at risk.

Compliance Impact

This vulnerability does not directly affect compliance with GDPR, HIPAA, or similar standards as it is a low-level kernel memory corruption issue in the ath6kl WiFi driver. Compliance impacts would only occur if this vulnerability were exploited to gain unauthorized access to sensitive data, which is not described in the provided context.

Mitigation Strategies

Apply the latest Linux kernel update that includes the fix for this issue. If immediate patching is not possible, disable the ath6kl driver by blacklisting it or restrict WiFi usage to trusted networks until patched.

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