CVE-2026-23146

Katalog CVE

CVSS 5.5 · Medium EPSS 0,14%

Kerentanan NULL Pointer Dereference pada linux kernel. Skor CVSS 3.1 5.5 (Medium) menurut NVD.

Deskripsi (NVD)

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_uart: fix null-ptr-deref in hci_uart_write_work hci_uart_set_proto() sets HCI_UART_PROTO_INIT before calling hci_uart_register_dev(), which calls proto->open() to initialize hu->priv. However, if a TTY write wakeup occurs during this window, hci_uart_tx_wakeup() may schedule write_work before hu->priv is initialized, leading to a NULL pointer dereference in hci_uart_write_work() when proto->dequeue() accesses hu->priv. The race condition is: CPU0 CPU1 ---- ---- hci_uart_set_proto() set_bit(HCI_UART_PROTO_INIT) hci_uart_register_dev() tty write wakeup hci_uart_tty_wakeup() hci_uart_tx_wakeup() schedule_work(&hu->write_work) proto->open(hu) // initializes hu->priv hci_uart_write_work() hci_uart_dequeue() proto->dequeue(hu) // accesses hu->priv (NULL!) Fix this by moving set_bit(HCI_UART_PROTO_INIT) after proto->open() succeeds, ensuring hu->priv is initialized before any work can be scheduled.

Rincian

Terbit di NVD

14 Februari 2026

Terakhir diubah

17 Juni 2026

Status NVD

Analyzed

CVSS 3.1

5.5 (Medium), sumber NVD
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H · uraikan di kalkulator

Jenis kelemahan (CWE)

CWE-476: NULL Pointer Dereference

EPSS (30 hari)

0,14% peluang dieksploitasi; lebih tinggi dari 3,2% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://git.kernel.org/stable/c/03e8c90c62233382042b7bd0fa8b8900552fdb62 patch
• https://git.kernel.org/stable/c/0c3cd7a0b862c37acbee6d9502107146cc944398 patch
• https://git.kernel.org/stable/c/186d147cf7689ba1f9b3ddb753ab634a84940cc9 patch
• https://git.kernel.org/stable/c/53e54cb31e667fca05b1808b990eac0807d1dab0 patch
• https://git.kernel.org/stable/c/937a573423ce5a96fdb1fd425dc6b8d8d4ab5779 patch
• https://git.kernel.org/stable/c/b0a900939e7e4866d9b90e9112514b72c451e873 patch
• https://git.kernel.org/stable/c/ccc683f597ceb28deb966427ae948e5ac739a909 patch