Linux vulnerability

What happened

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: mgmt: hold reference for hci_conn in mgmt_pending_cmds Dereferencing RCU-protected pointers outside critical sections is invalid and may lead to UAF. Use of hci_conn in hci_sync callbacks also needs to hold refcount to avoid UAF. Take appropriate locks for hci_conn lookups, and take refcount for hci_conn pointers stored in mgmt_pending_cmd so that the pointer stays valid. When accessing conn->state, ensure hdev->lock is held to avoid data race.

Affected versions

Linux: 7b445e220db9a2c58be5d09bbbd322abf1b1452a through before 84674dd1d3192ecb050827d3148642609c0c9dbb (git); 7b445e220db9a2c58be5d09bbbd322abf1b1452a through before b56f2ecafc08f372bf0529f9c4f3f429cb1702dc (git); 7b445e220db9a2c58be5d09bbbd322abf1b1452a through before f915e74b6f18293d1d69a2a3305ef321ff7c0172 (git); 7b445e220db9a2c58be5d09bbbd322abf1b1452a through before d5b3b484b62bb0f4542e7622789d28871626cdf0 (git); 7b445e220db9a2c58be5d09bbbd322abf1b1452a through before ecdcb55ea1c01dda074406f38058785a69526734 (git); 7b445e220db9a2c58be5d09bbbd322abf1b1452a through before da55f570191d5d72f10c607a7043b947eb05ea46 (git); 6.0 Fixed: See vendor advisory.

Why it matters

Review the vendor advisory and exposure of the affected product to determine operational impact.

Detection & mitigation

• Apply vendor-provided updates or mitigations.
• Review affected product exposure and access logs.