VULNERABILITY INTELLIGENCE
CVE-2026-68393
CVSS score8.8 HIGH
EPSS probability0.24%
CISA KEVNot currently listed
Published2026-08-10
Last modified2026-10-21
CVSS vectorCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Description
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_sync: extend conn_hash lookup critical sections Using RCU-protected pointers outside the critical sections without refcount is incorrect and may result to UAF. Extend critical section to cover both hci_conn_hash lookup and use of the returned conn. Add surrounding rcu_read_lock() also when return value is not used, in preparation for RCU lockdep requirement to hci_lookup_le_connect(). This avoids concurrent deletion of the conn before we are done dereferencing it. Also, make sure to hold hdev->lock when accessing hdev->accept_list.
Weakness classification
- 134c704f-9b21-4f2e-91b3-4a467353bcc0: CWE-416