Double free in Linux kernel - CVE-2026-74534
Published: August 16, 2026
Vulnerability identifier: #VU143251
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-2026-74534
CWE-ID: CWE-415
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 double free in net/bluetooth/iso.c when deleting Bluetooth ISO connections concurrently. A local user can trigger a race condition to cause a denial of service.
The issue arises from a race between iso_conn_del() and iso_chan_del() in the Bluetooth ISO subsystem.
Affected software
Linux kernel
How to mitigate CVE-2026-74534
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3