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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2025-40308 Detail

Description

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: bcsp: receive data only if registered Currently, bcsp_recv() can be called even when the BCSP protocol has not been registered. This leads to a NULL pointer dereference, as shown in the following stack trace: KASAN: null-ptr-deref in range [0x0000000000000108-0x000000000000010f] RIP: 0010:bcsp_recv+0x13d/0x1740 drivers/bluetooth/hci_bcsp.c:590 Call Trace: <TASK> hci_uart_tty_receive+0x194/0x220 drivers/bluetooth/hci_ldisc.c:627 tiocsti+0x23c/0x2c0 drivers/tty/tty_io.c:2290 tty_ioctl+0x626/0xde0 drivers/tty/tty_io.c:2706 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:907 [inline] __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:893 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f To prevent this, ensure that the HCI_UART_REGISTERED flag is set before processing received data. If the protocol is not registered, return -EUNATCH.


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

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URL Source(s) Tag(s)
https://git.kernel.org/stable/c/164586725b47f9d61912e6bf17dbaffeff11710b kernel.org
https://git.kernel.org/stable/c/39a7d40314b6288cfa2d13269275e9247a7a055a kernel.org
https://git.kernel.org/stable/c/55c1519fca830f59a10bbf9aa8209c87b06cf7bc kernel.org
https://git.kernel.org/stable/c/799cd62cbcc3f12ee04b33ef390ff7d41c37d671 kernel.org
https://git.kernel.org/stable/c/8b892dbef3887dbe9afdc7176d1a5fd90e1636aa kernel.org
https://git.kernel.org/stable/c/b420a4c7f915fc1c94ad1f6ca740acc046d94334 kernel.org
https://git.kernel.org/stable/c/b65ca9708bfbf47d8b7bd44b7c574bd16798e9c9 kernel.org
https://git.kernel.org/stable/c/ca94b2b036c22556c3a66f1b80f490882deef7a6 kernel.org

Weakness Enumeration

CWE-ID CWE Name Source

Change History

1 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2025-40308
NVD Published Date:
12/07/2025
NVD Last Modified:
04/14/2026
Source:
kernel.org