WiFi Driver Underflow in iwlwifi MVM Firmware

Executive Summary

This vulnerability in the Linux kernel's iwlwifi driver could allow an underflow condition due to untrusted firmware data regarding the length of a wowlan packet. This might lead to unexpected behavior or crashes in the wireless subsystem.

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Detection Guidance

This vulnerability is specific to the Linux kernel's iwlwifi driver and relates to a possible underflow in WiFi WoWLAN (Wake on Wireless LAN) packet handling. Detection requires checking the kernel version and iwlwifi driver for the affected code. Use commands like 'uname -a' to check kernel version and 'modinfo iwlwifi' to inspect the driver. If your system runs a vulnerable kernel version, update it immediately.

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Impact Analysis

The impact may include system instability, crashes, or potential denial of service if the underflow occurs during wireless operations. Users could experience Wi-Fi connectivity issues or unexpected system freezes.

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Compliance Impact

This vulnerability does not provide sufficient information to determine its impact on compliance with standards like GDPR or HIPAA. The issue involves a possible underflow in the iwlwifi driver, which may affect system stability or security but lacks details on data exposure or privacy implications.

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Mitigation Strategies

Update the Linux kernel to the latest stable version to ensure the vulnerability is patched. Monitor vendor advisories for iwlwifi firmware updates and apply them promptly.

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