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CVE-2026-68393

8.8 · HIGH

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 witho…

Published Aug 10, 2026EPSS 0.24%

Overview

CVE-2026-68393 is a high-severity vulnerability. It was published on August 10, 2026 and has a CVSS 3.1 base score of 8.8 (HIGH).

This vulnerability has a CVSS 3.1 base score of 8.8, rated HIGH. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refgit.kernel.org/stable/c/38326774df6198df0cc2744cc73bf77cb741c538Refgit.kernel.org/stable/c/83b7e67698d0b93f685875ce82c8d335436834f7Refgit.kernel.org/stable/c/d5efd6e4b8b0634af6843178fe1a7dd2b2178a3d

How CyberStrike helps

Frequently asked questions

What is CVE-2026-68393?

CVE-2026-68393 is a high-severity vulnerability. It was published on August 10, 2026 and has a CVSS 3.1 base score of 8.8 (HIGH).

How severe is CVE-2026-68393?

This vulnerability has a CVSS 3.1 base score of 8.8, rated HIGH. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-68393?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-68393?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-68393 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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