Use-after-free in Linux kernel - CVE-2026-53072
Published: June 25, 2026
Vulnerability identifier: #VU135240
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-2026-53072
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 a use-after-free in hci_conn_request_evt() when handling deferred Bluetooth connection requests. A local user can trigger concurrent connection handling to cause a denial of service.
Only SCO deferred setup listen code paths are affected.
How to mitigate CVE-2026-53072
Install security update from vendor's repository.
Sources
- https://git.kernel.org/stable/c/385b2d0468a0871fc716c549fa3b0c257c7dbcb3
- https://git.kernel.org/stable/c/541d5bf9b5afaf41090b2a3aa7b47f2db2ff801f
- https://git.kernel.org/stable/c/5c7209a341ff2ac338b2b0375c34a307b37c9ac2
- https://git.kernel.org/stable/c/60e3f4ff02d1f2d55bfbf2ca32a97285a9771ee4
- https://git.kernel.org/stable/c/6b4d226d01ab7da0d2027a2a1e3a6079152e5065
- https://git.kernel.org/stable/c/9d4a6c0f43fc5e4d4f062e8e450e5483eb74176e
- https://git.kernel.org/stable/c/c27224daf0b08efbb2b24ed64b6139b294f5473a
- https://git.kernel.org/stable/c/c7777f534a8018ae4bb1c80d8925af4df588a314