Use-after-free in Linux kernel - CVE-2026-53276
Published: June 26, 2026
Vulnerability identifier: #VU135481
CSH Severity: Low
CVSS v4.0: 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/E:U/U:Clear
CVE-ID: CVE-2026-53276
CWE-ID: CWE-416
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to use-after-free in iso_sock_rebind_bc() when handling a concurrent socket close during Bluetooth ISO socket rebinding. A local user can trigger a concurrent close operation to cause a denial of service.
The issue involves the hci_conn pointer in the Linux kernel Bluetooth ISO subsystem.
How to mitigate CVE-2026-53276
Install security update from vendor's repository.