In the Linux kernel, the following vulnerability has been resolved: Bluetooth: fix memory leak in error path of hci_alloc_dev() Early failures in Bluetooth HCI UART configuration leak SRCU percpu memory. When device initialization fails before hci_register_dev() completes, the HCI_UNREGISTER flag is never set. As a result, when the device reference count reaches zero, bt_host_release() evaluates this flag as false and falls back to a direct kfree(hdev). Because hci_release_dev() is bypassed, the SRCU struct initialized early in hci_alloc_dev() is never cleaned up, resulting in a leak of percpu memory. Fix the leak by explicitly calling cleanup_srcu_struct() in the fallback (unregistered) branch of bt_host_release() before freeing the device.

Metrics

No CVSS v4.0

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

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Affected Vendors & Products

Vendors Products
Linux
  • Linux Kernel

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References
Link Providers
https://git.kernel.org/stable/c/0622e527a31d4b44737fed5c1a2ac1fc2cfb5184 cve-icon
https://git.kernel.org/stable/c/37b3009bf5976e8ab77c8b9a9bc3bbd7ff49e37f cve-icon
https://git.kernel.org/stable/c/5b7dfca6f852e6b9d809fd0263b5427cc9fb33fd cve-icon
https://git.kernel.org/stable/c/bc2efe73c194a74839d7cf57b63880d97e21d309 cve-icon
https://git.kernel.org/stable/c/c016118b9e51eeaf5bc93850d4c455a3b583c0aa cve-icon
https://git.kernel.org/stable/c/ce4b4cac3c5749b6aa75e62e2991ae2263f2f889 cve-icon
https://git.kernel.org/stable/c/f82799407a50af7bcacacf09cc9b279af8fe9b81 cve-icon
History

Thu, 25 Jun 2026 09:15:00 +0000

Type Values Removed Values Added
Description In the Linux kernel, the following vulnerability has been resolved: Bluetooth: fix memory leak in error path of hci_alloc_dev() Early failures in Bluetooth HCI UART configuration leak SRCU percpu memory. When device initialization fails before hci_register_dev() completes, the HCI_UNREGISTER flag is never set. As a result, when the device reference count reaches zero, bt_host_release() evaluates this flag as false and falls back to a direct kfree(hdev). Because hci_release_dev() is bypassed, the SRCU struct initialized early in hci_alloc_dev() is never cleaned up, resulting in a leak of percpu memory. Fix the leak by explicitly calling cleanup_srcu_struct() in the fallback (unregistered) branch of bt_host_release() before freeing the device.
Title Bluetooth: fix memory leak in error path of hci_alloc_dev()
First Time appeared Linux
Linux linux Kernel
CPEs cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Vendors & Products Linux
Linux linux Kernel
References
cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published:

Updated: 2026-06-25T08:39:43.951Z

Reserved: 2026-06-09T07:44:35.394Z

Link: CVE-2026-53252

cve-icon Vulnrichment

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cve-icon NVD

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cve-icon Redhat

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cve-icon OpenCVE Enrichment

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