🔐 CVE Alert

CVE-2026-53252

UNKNOWN 0.0

Bluetooth: fix memory leak in error path of hci_alloc_dev()

CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th

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.

Vendor linux
Product linux
Ecosystems
Industries
Technology
Published Jun 25, 2026
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Affected Versions

Linux / Linux
90dee0a0ff84fac8accd5be98412b3819f667149 < 5b7dfca6f852e6b9d809fd0263b5427cc9fb33fd c56b177efce8b62798e4d96bdb9867106cb7c4a0 < c016118b9e51eeaf5bc93850d4c455a3b583c0aa bc0819a25e04cd68ef3568cfa51b63118fea39a7 < 0622e527a31d4b44737fed5c1a2ac1fc2cfb5184 ce23b73f0f27e2dbeb81734a79db710f05aa33c6 < bc2efe73c194a74839d7cf57b63880d97e21d309 1d6123102e9fbedc8d25bf4731da6d513173e49e < ce4b4cac3c5749b6aa75e62e2991ae2263f2f889 1d6123102e9fbedc8d25bf4731da6d513173e49e < f82799407a50af7bcacacf09cc9b279af8fe9b81 1d6123102e9fbedc8d25bf4731da6d513173e49e < 37b3009bf5976e8ab77c8b9a9bc3bbd7ff49e37f dd4becd3fd4102696e1c15e6d260a1712a2d8685 0e5c144c557df910ab64d9c25d06399a9a735e65 5.15.209 < 5.15.210 6.1.167 < 6.1.176 6.6.97 < 6.6.143 6.12.36 < 6.12.94 5.10.259 < 5.11 6.15.5 < 6.16
Linux / Linux
6.16

References

NVD ↗ CVE.org ↗ EPSS Data ↗
git.kernel.org: https://git.kernel.org/stable/c/5b7dfca6f852e6b9d809fd0263b5427cc9fb33fd git.kernel.org: https://git.kernel.org/stable/c/c016118b9e51eeaf5bc93850d4c455a3b583c0aa git.kernel.org: https://git.kernel.org/stable/c/0622e527a31d4b44737fed5c1a2ac1fc2cfb5184 git.kernel.org: https://git.kernel.org/stable/c/bc2efe73c194a74839d7cf57b63880d97e21d309 git.kernel.org: https://git.kernel.org/stable/c/ce4b4cac3c5749b6aa75e62e2991ae2263f2f889 git.kernel.org: https://git.kernel.org/stable/c/f82799407a50af7bcacacf09cc9b279af8fe9b81 git.kernel.org: https://git.kernel.org/stable/c/37b3009bf5976e8ab77c8b9a9bc3bbd7ff49e37f