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CVE-2026-68392: Bluetooth: mgmt: fix locking in unpair_device/disconnect_sync

• Severity: high (CVSS 7.8 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: 2026-08-10 · updated 2026-08-23

Description

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: mgmt: fix locking in unpair_device/disconnect_sync Dereferencing RCU-protected pointers outside critical sections is invalid and may lead to UAF. Take hdev->lock for hci_conn lookup and hci_abort_conn(). Don't use RCU to ensure the conn is fully initialized at this point.

Affected products

• Linux kernel: from 6.6.51 before 6.6.148; from 6.10.10 before 6.11; 6.11 — fixed in 6.11, 6.6.148, 7.2

How to fix

Upgrade to a fixed version: Linux kernel 6.11, 6.6.148, 7.2. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/16cd66443957e4ad42155c6fec401012f600c6f8
• https://git.kernel.org/stable/c/579faba5ede6df6b7f36777c431dc8dcf9d272e7
• https://git.kernel.org/stable/c/74f3e6e21ebc6c418d348f8ce68aef6fe6d82c82
• https://git.kernel.org/stable/c/8bc83f9ef6789571f399ff631a2a14a12b6d8585
• https://git.kernel.org/stable/c/b11511006f9e17000de3f4cadee451364f658ca3
• https://git.kernel.org/stable/c/ca58ad287bfc5b9d31a72ecb8650289df2b57250

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