CVE-2026-68391

Summary

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 Software

VendorProductVersion RangeStatus
LinuxLinux7b445e220db9a2c58be5d09bbbd322abf1b1452a < b56f2ecafc08f372bf0529f9c4f3f429cb1702dcaffected
LinuxLinux7b445e220db9a2c58be5d09bbbd322abf1b1452a < f915e74b6f18293d1d69a2a3305ef321ff7c0172affected
LinuxLinux7b445e220db9a2c58be5d09bbbd322abf1b1452a < d5b3b484b62bb0f4542e7622789d28871626cdf0affected
LinuxLinux7b445e220db9a2c58be5d09bbbd322abf1b1452a < ecdcb55ea1c01dda074406f38058785a69526734affected
LinuxLinux7b445e220db9a2c58be5d09bbbd322abf1b1452a < da55f570191d5d72f10c607a7043b947eb05ea46affected
LinuxLinux6.0affected
LinuxLinux0 < 6.0unaffected
LinuxLinux6.6.148 <= 6.6.*unaffected
LinuxLinux6.12.101 <= 6.12.*unaffected
LinuxLinux6.18.42 <= 6.18.*unaffected
LinuxLinux7.1.6 <= 7.1.*unaffected
LinuxLinux7.2-rc4 <= *unaffected

Weaknesses

References