CVE-2026-68391 is a vulnerability in Linux Kernel
Published on August 10, 2026
Bluetooth: mgmt: hold reference for hci_conn in mgmt_pending_cmds
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.
Products Associated with CVE-2026-68391
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Affected Versions
Linux:- Version 7b445e220db9a2c58be5d09bbbd322abf1b1452a and below b56f2ecafc08f372bf0529f9c4f3f429cb1702dc is affected.
- Version 7b445e220db9a2c58be5d09bbbd322abf1b1452a and below f915e74b6f18293d1d69a2a3305ef321ff7c0172 is affected.
- Version 7b445e220db9a2c58be5d09bbbd322abf1b1452a and below d5b3b484b62bb0f4542e7622789d28871626cdf0 is affected.
- Version 7b445e220db9a2c58be5d09bbbd322abf1b1452a and below ecdcb55ea1c01dda074406f38058785a69526734 is affected.
- Version 7b445e220db9a2c58be5d09bbbd322abf1b1452a and below da55f570191d5d72f10c607a7043b947eb05ea46 is affected.
- Version 6.0 is affected.
- Before 6.0 is unaffected.
- Version 6.6.148, <= 6.6.* is unaffected.
- Version 6.12.101, <= 6.12.* is unaffected.
- Version 6.18.42, <= 6.18.* is unaffected.
- Version 7.1.6, <= 7.1.* is unaffected.
- Version 7.2-rc4, <= * is unaffected.