CVE-2026-23146
published 2026-02-14CVE-2026-23146: 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…
PriorityP420medium5.5CVSS 3.1
AVLACLPRLUINSUCNINAH
EPSS
0.12%
2.5th percentile
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.
Affected
74 ranges· showing 25
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | linux | < linux 6.1.162-1 (bookworm) | linux 6.1.162-1 (bookworm) |
| linux | linux | — | — |
| linux | linux | — | — |
| linux | linux | — | — |
| linux | linux | — | — |
| linux | linux | >= 02e1bcdfdf769974e7e9fa285e295cd9852e2a38 < 186d147cf7689ba1f9b3ddb753ab634a84940cc9 | 186d147cf7689ba1f9b3ddb753ab634a84940cc9 |
| linux | linux | >= 281782d2c6730241e300d630bb9f200d831ede71 < 53e54cb31e667fca05b1808b990eac0807d1dab0 | 53e54cb31e667fca05b1808b990eac0807d1dab0 |
| linux | linux | >= 5.10.237 < 5.10.249 | 5.10.249 |
| linux | linux | >= 5.15.181 < 5.15.199 | 5.15.199 |
| linux | linux | >= 5.4.293 < 5.5 | 5.5 |
| linux | linux | >= 5df5dafc171b90d0b8d51547a82657cd5a1986c7 < 03e8c90c62233382042b7bd0fa8b8900552fdb62 | 03e8c90c62233382042b7bd0fa8b8900552fdb62 |
| linux | linux | >= 5df5dafc171b90d0b8d51547a82657cd5a1986c7 < 0c3cd7a0b862c37acbee6d9502107146cc944398 | 0c3cd7a0b862c37acbee6d9502107146cc944398 |
| linux | linux | >= 6.1.135 < 6.1.162 | 6.1.162 |
| linux | linux | >= 6.12.24 < 6.12.69 | 6.12.69 |
| linux | linux | >= 6.13.12 < 6.14 | 6.14 |
| linux | linux | >= 6.14.3 < 6.15 | 6.15 |
| linux | linux | >= 6.6.88 < 6.6.123 | 6.6.123 |
| linux | linux | >= 80f14e9de6a43a0bd8194cad1003a3e6dcbc3984 < 937a573423ce5a96fdb1fd425dc6b8d8d4ab5779 | 937a573423ce5a96fdb1fd425dc6b8d8d4ab5779 |
| linux | linux | >= 9e5a0f5777162e503400c70c6ed25fbbe2d38799 < ccc683f597ceb28deb966427ae948e5ac739a909 | ccc683f597ceb28deb966427ae948e5ac739a909 |
| linux | linux | >= a40f94f7caa8d3421b64f63ac31bc0f24c890f39 < b0a900939e7e4866d9b90e9112514b72c451e873 | b0a900939e7e4866d9b90e9112514b72c451e873 |
| linux | linux_kernel | — | — |
| linux | linux_kernel | >= 0 < 5.10.249-1 | 5.10.249-1 |
| linux | linux_kernel | >= 0 < 6.1.162-1 | 6.1.162-1 |
| linux | linux_kernel | >= 0 < 6.12.69-1 | 6.12.69-1 |
| linux | linux_kernel | >= 0 < 6.18.9-1 | 6.18.9-1 |
CVSS provenance
nvdv3.15.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
osv5.5MEDIUM
vendor_ubuntu7.8HIGH
vendor_debian5.5MEDIUM
vendor_redhat5.5MEDIUM
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An attacker could possibly use these to compromise the system.
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- DMA engine subsystem;
- DPLL subsystem;
- GPU drivers;
- HID subsystem;
- Intel Trace Hub HW tracing drivers;
- IIO ADC drivers;
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- IRQ chip drivers;
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An attacker could possibly use these to compromise the system.
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- x86 architecture;
- Cryptographic API;
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A local attacker could use this to escalate privileges, or possibly escape
a container. (CVE-2026-31431)
Several security issues were discovered in the Linux kernel.
An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:
- ARM64 architecture;
- x86 architecture;
- Cryptographic API;
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- Drivers core;
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- DMA engine subsystem;
- GPU drivers;
- HID subsystem;
- Intel Trace Hub HW tracing drivers;
- IIO ADC drivers;
- IRQ chip drivers;
- Modular ISDN driver;
- LED subsystem;
- UACCE accelerator framework;
- Ethernet bonding driver;
- Network drivers;
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This update corrects flaws in the following subsystems:
- ARM64 architecture;
- Block layer subsystem;
- Drivers core;
- Bluetooth drivers;
- DMA engine subsystem;
- GPU drivers;
- HID subsystem;
- Intel Trace Hub HW tracing drivers;
- IIO ADC drivers;
- IRQ chip drivers;
- Modular ISDN driver;
- LED subsystem;
- UACCE accelerator framework;
- Ethernet bonding driver;
- Network drivers;
- STMicroelectronics network drivers;
- Ethernet team driver;
- NVME drivers;
- PHY drivers;
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- W1 Dallas's 1-wire bus driver;
- Xen hypervisor drivers;
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Title: Linux kernel vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
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An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:
- ARM64 architecture;
- Block layer subsystem;
- Drivers core;
- Bluetooth drivers;
- DMA engine subsystem;
- GPU drivers;
- HID subsystem;
- Intel Trace Hub HW tracing drivers;
- IIO ADC drivers;
- IRQ chip drivers;
- Modular ISDN driver;
- LED subsystem;
- UACCE accelerator framework;
- Ethernet bonding driver;
- Network drivers;
- STMicroelectronics network drivers;
- Ethernet team driver;
- NVME drivers;
- PHY drivers;
- SLIMbus drivers;
- W1 Dallas's 1-wire bus driver;
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Title: Linux kernel (HWE) vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
Several security issues were discovered in the Linux kernel.
An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:
- ARM64 architecture;
- Block layer subsystem;
- Cryptographic API;
- Drivers core;
- Bluetooth drivers;
- DMA engine subsystem;
- GPU drivers;
- HID subsystem;
- Intel Trace Hub HW tracing drivers;
- IIO ADC drivers;
- IRQ chip drivers;
- Modular ISDN driver;
- LED subsystem;
- UACCE accelerator framework;
- Ethernet bonding driver;
- Network drivers;
- STMicroelectronics network drivers;
- Ethernet team driver;
- NVME drivers;
- PHY drivers;
- SLIMbus drivers;
- W1 Dallas's 1-wire bus driver;
- Xen hyper
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Summary: Several security issues were fixed in the Linux kernel.
Several security issues were discovered in the Linux kernel.
An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:
- ARM64 architecture;
- Block layer subsystem;
- Drivers core;
- Bluetooth drivers;
- DMA engine subsystem;
- GPU drivers;
- HID subsystem;
- Intel Trace Hub HW tracing drivers;
- IIO ADC drivers;
- IRQ chip drivers;
- Modular ISDN driver;
- LED subsystem;
- UACCE accelerator framework;
- Ethernet bonding driver;
- Network drivers;
- STMicroelectronics network drivers;
- Ethernet team driver;
- NVME drivers;
- PHY drivers;
- SLIMbus drivers;
- W1 Dallas's 1-wire bus driver;
- Xen hypervisor drivers;
- B
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CVE-2026-23076 [MEDIUM] Linux kernel (FIPS) vulnerabilities
Title: Linux kernel (FIPS) vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
Several security issues were discovered in the Linux kernel.
An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:
- ARM64 architecture;
- Block layer subsystem;
- Drivers core;
- Bluetooth drivers;
- DMA engine subsystem;
- GPU drivers;
- HID subsystem;
- Intel Trace Hub HW tracing drivers;
- IIO ADC drivers;
- IRQ chip drivers;
- Modular ISDN driver;
- LED subsystem;
- UACCE accelerator framework;
- Ethernet bonding driver;
- Network drivers;
- STMicroelectronics network drivers;
- Ethernet team driver;
- NVME drivers;
- PHY drivers;
- SLIMbus drivers;
- W1 Dallas's 1-wire bus driver;
- Xen hypervisor drivers;
- BTR
Ubuntu
Linux kernel (Real-time) vulnerabilities
vendor_ubuntu·2026-04-17·CVSS 5.5
CVE-2026-23076 [MEDIUM] Linux kernel (Real-time) vulnerabilities
Title: Linux kernel (Real-time) vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
Several security issues were discovered in the Linux kernel.
An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:
- ARM64 architecture;
- Block layer subsystem;
- Drivers core;
- Bluetooth drivers;
- DMA engine subsystem;
- GPU drivers;
- HID subsystem;
- Intel Trace Hub HW tracing drivers;
- IIO ADC drivers;
- IRQ chip drivers;
- Modular ISDN driver;
- LED subsystem;
- UACCE accelerator framework;
- Ethernet bonding driver;
- Network drivers;
- STMicroelectronics network drivers;
- Ethernet team driver;
- NVME drivers;
- PHY drivers;
- SLIMbus drivers;
- W1 Dallas's 1-wire bus driver;
- Xen hypervisor drivers;
Ubuntu
Linux kernel vulnerabilities
vendor_ubuntu·2026-04-16·CVSS 5.5
CVE-2026-23076 [MEDIUM] Linux kernel vulnerabilities
Title: Linux kernel vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
Several security issues were discovered in the Linux kernel.
An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:
- ARM64 architecture;
- Block layer subsystem;
- Drivers core;
- Bluetooth drivers;
- DMA engine subsystem;
- GPU drivers;
- HID subsystem;
- Intel Trace Hub HW tracing drivers;
- IIO ADC drivers;
- IRQ chip drivers;
- Modular ISDN driver;
- LED subsystem;
- UACCE accelerator framework;
- Ethernet bonding driver;
- Network drivers;
- STMicroelectronics network drivers;
- Ethernet team driver;
- NVME drivers;
- PHY drivers;
- SLIMbus drivers;
- W1 Dallas's 1-wire bus driver;
- Xen hypervisor drivers;
- BTRFS file
Ubuntu
Linux kernel (NVIDIA Tegra) vulnerabilities
vendor_ubuntu·2026-04-09·CVSS 5.5
CVE-2023-54207 [MEDIUM] Linux kernel (NVIDIA Tegra) vulnerabilities
Title: Linux kernel (NVIDIA Tegra) vulnerabilities
Summary: Several security issues were fixed in the Linux kernel.
Several security issues were discovered in the Linux kernel.
An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:
- ARM64 architecture;
- Block layer subsystem;
- Cryptographic API;
- Drivers core;
- Bluetooth drivers;
- DMA engine subsystem;
- GPU drivers;
- HID subsystem;
- Intel Trace Hub HW tracing drivers;
- IIO ADC drivers;
- IRQ chip drivers;
- Modular ISDN driver;
- LED subsystem;
- UACCE accelerator framework;
- Ethernet bonding driver;
- Network drivers;
- STMicroelectronics network drivers;
- Ethernet team driver;
- NVME drivers;
- PHY drivers;
- SLIMbus drivers;
- W1 Dallas's 1-wire bus driver;
-
Red Hat
kernel: Linux kernel: Denial of Service in Bluetooth HCI UART driver via null pointer dereference
vendor_redhat·2026-02-14·CVSS 5.5
CVE-2026-23146 [MEDIUM] CWE-476 kernel: Linux kernel: Denial of Service in Bluetooth HCI UART driver via null pointer dereference
kernel: Linux kernel: Denial of Service in Bluetooth HCI UART driver via null pointer dereference
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-
Debian
CVE-2026-23146: linux - In the Linux kernel, the following vulnerability has been resolved: Bluetooth: ...
vendor_debian·2026·CVSS 5.5
CVE-2026-23146 [MEDIUM] CVE-2026-23146: linux - In the Linux kernel, the following vulnerability has been resolved: Bluetooth: ...
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
GHSA
GHSA-hcr8-x92w-q652: 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_prot
ghsa_unreviewed·2026-02-14
CVE-2026-23146 [MEDIUM] CWE-476 GHSA-hcr8-x92w-q652: 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_prot
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()
p
OSV
CVE-2026-23146: 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(
osv·2026-02-14·CVSS 5.5
CVE-2026-23146 [MEDIUM] CVE-2026-23146: 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(
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
No detection rules found.
No public exploits indexed.
Wiz
CVE-2026-23146 Impact, Exploitability, and Mitigation Steps | Wiz
blogs_wiz·CVSS 5.5
CVE-2026-23146 [MEDIUM] CVE-2026-23146 Impact, Exploitability, and Mitigation Steps | Wiz
## CVE-2026-23146 :
Linux Kernel vulnerability analysis and mitigation
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)
//
Bugzilla
CVE-2026-23146 kernel: Linux kernel: Denial of Service in Bluetooth HCI UART driver via null pointer dereference
bugzilla·2026-02-14·CVSS 5.5
CVE-2026-23146 [MEDIUM] CVE-2026-23146 kernel: Linux kernel: Denial of Service in Bluetooth HCI UART driver via null pointer dereference
CVE-2026-23146 kernel: Linux kernel: Denial of Service in Bluetooth HCI UART driver via null pointer dereference
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()
https://git.kernel.org/stable/c/03e8c90c62233382042b7bd0fa8b8900552fdb62https://git.kernel.org/stable/c/0c3cd7a0b862c37acbee6d9502107146cc944398https://git.kernel.org/stable/c/186d147cf7689ba1f9b3ddb753ab634a84940cc9https://git.kernel.org/stable/c/53e54cb31e667fca05b1808b990eac0807d1dab0https://git.kernel.org/stable/c/937a573423ce5a96fdb1fd425dc6b8d8d4ab5779https://git.kernel.org/stable/c/b0a900939e7e4866d9b90e9112514b72c451e873https://git.kernel.org/stable/c/ccc683f597ceb28deb966427ae948e5ac739a909
2026-02-14
Published