CVE intelligence

CVE-2026-68393

Vulnerability intelligence

Published Aug 10, 2026Sources checked Oct 8, 2026

8.8HIGHCVSS out of 10

What this means

Review the available evidence

CVE-2026-68393 and is rated High severity with a CVSS score of 8.8. It is not in the current CISA KEV record we collected. That does not prove exploitation has not occurred.

CISA KEVNot listedBased on the latest collected catalog

EPSS0.4%Estimated 30-day exploitation probability

Ransomware useNot markedCISA KEV ransomware field

Threat actors0Source-linked actor relationships

Overview

What is CVE-2026-68393?

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.

Source: NVD