Summaryinfo

A vulnerability was found in Linux Kernel up to 6.18.16/6.19.6/7.0-rc1. It has been classified as critical. Affected by this issue is the function skb_queue_purge of the component Bluetooth. The manipulation leads to an unknown weakness. This vulnerability is uniquely identified as CVE-2026-23299. No exploit exists. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in Linux Kernel up to 6.18.16/6.19.6/7.0-rc1 and classified as critical. This issue affects the function skb_queue_purge of the component Bluetooth. The impact remains unknown. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: purge error queues in socket destructors When TX timestamping is enabled via SO_TIMESTAMPING, SKBs may be queued into sk_error_queue and will stay there until consumed. If userspace never gets to read the timestamps, or if the controller is removed unexpectedly, these SKBs will leak. Fix by adding skb_queue_purge() calls for sk_error_queue in affected bluetooth destructors. RFCOMM does not currently use sk_error_queue.

The advisory is shared at git.kernel.org. The identification of this vulnerability is CVE-2026-23299 since 01/13/2026. Technical details are known, but no exploit is available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 03/26/2026).

Upgrading to version 6.18.17, 6.19.7 or 7.0-rc2 eliminates this vulnerability. Applying the patch 2b6c942a526635f5c61d2f000258e620da32d3a7/3de7c10a950b36affc692d8bd2ac713852580e56/21e4271e65094172aadd5beb8caea95dd0fbf6d7 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.

The vulnerability is also documented in the vulnerability database at CERT Bund (WID-SEC-2026-0861). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Affected

• Open Source Linux Kernel

Productinfo

Type

• Operating System

Vendor

• Linux

Name

• Kernel

Version

• 6.18.0
• 6.18.1
• 6.18.2
• 6.18.3
• 6.18.4
• 6.18.5
• 6.18.6
• 6.18.7
• 6.18.8
• 6.18.9
• 6.18.10
• 6.18.11
• 6.18.12
• 6.18.13
• 6.18.14
• 6.18.15
• 6.18.16
• 6.19.0
• 6.19.1
• 6.19.2
• 6.19.3
• 6.19.4
• 6.19.5
• 6.19.6
• 7.0-rc1

License

• open-source

Website

• Vendor: https://www.kernel.org/

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