CVE-2026-23146In 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_uar…
Updated under an hour ago ()
Does this affect you?
It affects linux_kernel. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
Do this next
Free account, 1 product
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.
- CVSS
- 5.5 MEDIUM (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- Weakness (CWE)
- CWE-476
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Not given
- NVD analysis
- Analyzed
- Record last updated
- Jun 17, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
linux linux_kernel linux:linux_kernel | from 5.4.293 before 5.5; from 5.10.237 before 5.10.249; from 5.15.181 before 5.15.199; from 6.1.135 before 6.1.162; from 6.6.88 before 6.6.123; from 6.12.24 before 6.12.69; from 6.13.12 before 6.14; from 6.14.3 before 6.18.9; and 7 more ranges | NVD |
References
- https://git.kernel.org/stable/c/03e8c90c62233382042b7bd0fa8b8900552fdb62patch
- https://git.kernel.org/stable/c/0c3cd7a0b862c37acbee6d9502107146cc944398patch
- https://git.kernel.org/stable/c/186d147cf7689ba1f9b3ddb753ab634a84940cc9patch
- https://git.kernel.org/stable/c/53e54cb31e667fca05b1808b990eac0807d1dab0patch
- https://git.kernel.org/stable/c/937a573423ce5a96fdb1fd425dc6b8d8d4ab5779patch
- https://git.kernel.org/stable/c/b0a900939e7e4866d9b90e9112514b72c451e873patch
- https://git.kernel.org/stable/c/ccc683f597ceb28deb966427ae948e5ac739a909patch
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.