Linux Kernel up to 6.7.4 cfg80211 denial of service

Summaryinfo

A vulnerability was found in Linux Kernel up to 6.7.4. It has been rated as problematic. The affected element is an unknown function of the component cfg80211. This manipulation causes denial of service. The identification of this vulnerability is CVE-2024-26683. There is no exploit available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability has been found in Linux Kernel up to 6.7.4 and classified as problematic. Affected by this vulnerability is an unknown function of the component cfg80211. The manipulation with an unknown input leads to a denial of service vulnerability. The CWE definition for the vulnerability is CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. As an impact it is known to affect availability. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: wifi: cfg80211: detect stuck ECSA element in probe resp We recently added some validation that we don't try to connect to an AP that is currently in a channel switch process, since that might want the channel to be quiet or we might not be able to connect in time to hear the switching in a beacon. This was in commit c09c4f31998b ("wifi: mac80211: don't connect to an AP while it's in a CSA process"). However, we promptly got a report that this caused new connection failures, and it turns out that the AP that we now cannot connect to is permanently advertising an extended channel switch announcement, even with quiet. The AP in question was an Asus RT-AC53, with firmware 3.0.0.4.380_10760-g21a5898. As a first step, attempt to detect that we're dealing with such a situation, so mac80211 can use this later.

It is possible to read the advisory at git.kernel.org. This vulnerability is known as CVE-2024-26683 since 02/19/2024. The technical details are unknown and an exploit is not publicly available.

Upgrading to version 6.7.5 or 6.8 eliminates this vulnerability. Applying the patch ce112c941c2b/177fbbcb4ed6 is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. The best possible mitigation is suggested to be upgrading to the latest version.

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Productinfo

Type

• Operating System

Vendor

• Linux

Name

• Kernel

Version

• 6.7.0
• 6.7.1
• 6.7.2
• 6.7.3
• 6.7.4

License

• open-source

Website

• Vendor: https://www.kernel.org/

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