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CVE-2026-23299: Bluetooth: purge error queues in socket destructors

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-03-25 · updated 2026-06-17
• Weakness: CWE-772

Description

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.

Affected products

• Linux kernel: from 6.15 before 6.18.17; from 6.19 before 6.19.7; 7.0-rc1 — fixed in 6.18.17, 6.19.7

How to fix

Upgrade to a fixed version: Linux kernel 6.18.17, 6.19.7. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/21e4271e65094172aadd5beb8caea95dd0fbf6d7
• https://git.kernel.org/stable/c/2b6c942a526635f5c61d2f000258e620da32d3a7
• https://git.kernel.org/stable/c/3de7c10a950b36affc692d8bd2ac713852580e56

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