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CVE-2025-40308

Bluetooth: bcsp: receive data only if registered

Published
Last modified
published
Not listed in CISA KEV
Fix
Fixed in 5.4.302, 5.10.247, 5.15.197, 6.1.159, 6.6.117, and 3 more
None on Exploit-DB, Metasploit or GitHub

Summary

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.

Timeline

  1. CVE published
  2. Record last updated

Affected versions

  • Linux Linux

    From 5.4.293 · fixed in 5.4.302; From 5.10.237 · fixed in 5.10.247; From 5.15.181 · fixed in 5.15.197; From 6.1.135 · fixed in 6.1.159; From 6.6.88 · fixed in 6.6.117; From 6.12.24 · fixed in 6.12.58; From 6.13.12 · fixed in 6.14; From 6.14.3 · fixed in 6.15

  • Linux Linux

    6.15

References 8

git.kernel.org