Use-after-free in Linux kernel - CVE-2026-43018
Published: May 2, 2026
Vulnerability identifier: #VU128901
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-2026-43018
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 attacker to cause a denial of service.
The vulnerability exists due to use-after-free in hci_le_remote_conn_param_req_evt when handling Bluetooth LE remote connection parameter request events. A local attacker can trigger concurrent connection handling to cause a denial of service.
How to mitigate CVE-2026-43018
Install security update from vendor's repository.
Sources
- https://git.kernel.org/stable/c/1d0bdbfe3e91c11f0a704c52443a9446a10d699c
- https://git.kernel.org/stable/c/59eecf0ffde15670e6a5e10c47be67f73d843b20
- https://git.kernel.org/stable/c/5fb69e1eeea9d6cba80517e9f058b56b34bc3a81
- https://git.kernel.org/stable/c/7cadb03be37e761130edb153544fe0770a842b19
- https://git.kernel.org/stable/c/b255531b27da336571411248c2a72a350662bd09
- https://git.kernel.org/stable/c/ea3cd36d7382d5f8309df04c275d20df139ed42c