Use-after-free in Linux kernel - CVE-2026-80692
Published: August 28, 2026
Vulnerability identifier: #VU146110
CSH Severity: Low
CVSS v4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-80692
CWE-ID: CWE-416
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to use-after-free in hci_connect_acl_sync() and hci_connect_le_sync() callbacks in net/bluetooth/hci_sync.c when processing Bluetooth connection operations. A local user can trigger a race condition to cause a denial of service.
The issue is described as theoretical and occurs if the connection object is freed while the hci_sync task is running.
Affected software
Linux kernel
How to mitigate CVE-2026-80692
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3