CVE-2026-68393

Last refreshed2026-10-17

Status: UPDATED | Advisory ID: CVE-2026-68393

Key Details

CVE	CVE-2026-68393
CVSS Score / Version	8.8 (High) / CVSS v3.1
Updated	2026-10-16
CVSS Vector	`CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`
CVSS Prose	attack vector is adjacent; attack complexity is low; privileges required is none; user interaction is none; scope is unchanged; confidentiality impact is high; integrity impact is high; availability impact is high.
Affected products	Linux Kernel

Vendor	Product	Affected Versions	Patch Status
Linux	Linux Kernel

Vendor

Product

Affected Versions

Patch Status

Linux

Linux Kernel

Subsystems	OT Supporting Infrastructure
Sectors	All Sectors

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. (NVD)

Monitor Linux's web page for any future patch releases.

Source	Reference
NVD	https://nvd.nist.gov/vuln/detail/CVE-2026-68393
CVE	https://www.cve.org/CVERecord?id=CVE-2026-68393

Source

Reference

NVD

CVE