Use-after-free in Linux kernel - CVE-2026-43322
Published: May 9, 2026
Vulnerability identifier: #VU130866
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-2026-43322
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 a use-after-free in le_read_features_complete in the Bluetooth hci_sync subsystem when processing Bluetooth Low Energy remote feature completion events. A local user can trigger a race condition that causes a freed hci_conn object to be accessed to cause a denial of service.
Affected software
Linux kernel
Red Hat Enterprise Linux for x86_64
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux for ARM 64
kernel (Red Hat package)
Red Hat Enterprise Linux for x86_64
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux for ARM 64
kernel (Red Hat package)
How to mitigate CVE-2026-43322
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3
kernel (Red Hat package) - update to 6.12.0-211.20.1.el10_2
kernel (Red Hat package) - update to 6.12.0-211.20.1.el10_2