CVE-2026-23362

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2026-23362
In the Linux kernel, the following vulnerability has been resolved: can: bcm: fix locking for bcm_op runtime updates Commit c2aba69d0c36 ("can: bcm: add locking for bcm_op runtime updates") added a locking for some variables that can be modified at runtime when updating the sending bcm_op with a new TX_SETUP command in bcm_tx_setup(). Usually the RX_SETUP only handles and filters incoming traffic with one exception: When the RX_RTR_FRAME flag is set a predefined CAN frame is sent when a specific RTR frame is received. Therefore the rx bcm_op uses bcm_can_tx() which uses the bcm_tx_lock that was only initialized in bcm_tx_setup(). Add the missing spin_lock_init() when allocating the bcm_op in bcm_rx_setup() to handle the RTR case properly.

5.5 /10

CVSS v3 : MEDIUM

V3 Legend

Vector :

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://git.kernel.org/stable/c/0904037e713f787d1376e1d349c3bdf6c3105881 Patch
https://git.kernel.org/stable/c/70e951afad4c025261fe3c952d2b07237e320a01 Patch
https://git.kernel.org/stable/c/800f26f11ae37b17f58e0001f28a47dd75c26557 Patch
https://git.kernel.org/stable/c/8215ba7bc99e84e66fd6938874ec4330a9d96518 Patch
https://git.kernel.org/stable/c/8bcf2d847adb82b2c617456f6da17ac5e6c75285 Patch
https://git.kernel.org/stable/c/c35636e91e392e1540949bbc67932167cb48bc3a Patch
https://git.kernel.org/stable/c/c85b96eaf766d8f066b1139a17a51efa2f6627ef Patch
https://git.kernel.org/stable/c/f0c349b2c21b220af5ba19f29b885e222958d796 Patch
Configurations

Configuration 1 (hide)

OR cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.15:-:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc4:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc5:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc6:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc7:*:*:*:*:*:*
History

24 Apr 2026, 18:21

Type Values Removed Values Added
CWE CWE-667
First Time Linux
Linux linux Kernel
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 5.5
References () https://git.kernel.org/stable/c/0904037e713f787d1376e1d349c3bdf6c3105881 - () https://git.kernel.org/stable/c/0904037e713f787d1376e1d349c3bdf6c3105881 - Patch
References () https://git.kernel.org/stable/c/70e951afad4c025261fe3c952d2b07237e320a01 - () https://git.kernel.org/stable/c/70e951afad4c025261fe3c952d2b07237e320a01 - Patch
References () https://git.kernel.org/stable/c/800f26f11ae37b17f58e0001f28a47dd75c26557 - () https://git.kernel.org/stable/c/800f26f11ae37b17f58e0001f28a47dd75c26557 - Patch
References () https://git.kernel.org/stable/c/8215ba7bc99e84e66fd6938874ec4330a9d96518 - () https://git.kernel.org/stable/c/8215ba7bc99e84e66fd6938874ec4330a9d96518 - Patch
References () https://git.kernel.org/stable/c/8bcf2d847adb82b2c617456f6da17ac5e6c75285 - () https://git.kernel.org/stable/c/8bcf2d847adb82b2c617456f6da17ac5e6c75285 - Patch
References () https://git.kernel.org/stable/c/c35636e91e392e1540949bbc67932167cb48bc3a - () https://git.kernel.org/stable/c/c35636e91e392e1540949bbc67932167cb48bc3a - Patch
References () https://git.kernel.org/stable/c/c85b96eaf766d8f066b1139a17a51efa2f6627ef - () https://git.kernel.org/stable/c/c85b96eaf766d8f066b1139a17a51efa2f6627ef - Patch
References () https://git.kernel.org/stable/c/f0c349b2c21b220af5ba19f29b885e222958d796 - () https://git.kernel.org/stable/c/f0c349b2c21b220af5ba19f29b885e222958d796 - Patch
CPE cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc6:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc7:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.15:-:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc4:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc5:*:*:*:*:*:*

18 Apr 2026, 09:16

Type Values Removed Values Added
Summary
  • (es) En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta: can: bcm: corregir el bloqueo para las actualizaciones en tiempo de ejecución de bcm_op El commit c2aba69d0c36 ('can: bcm: añadir bloqueo para las actualizaciones en tiempo de ejecución de bcm_op') añadió un bloqueo para algunas variables que pueden ser modificadas en tiempo de ejecución al actualizar el bcm_op de envío con un nuevo comando TX_SETUP en bcm_tx_setup(). Normalmente, el RX_SETUP solo maneja y filtra el tráfico entrante con una excepción: Cuando la bandera RX_RTR_FRAME está establecida, se envía una trama CAN predefinida cuando se recibe una trama RTR específica. Por lo tanto, el bcm_op de rx usa bcm_can_tx() que usa el bcm_tx_lock que solo fue inicializado en bcm_tx_setup(). Añadir el spin_lock_init() faltante al asignar el bcm_op en bcm_rx_setup() para manejar el caso RTR correctamente.
References
  • () https://git.kernel.org/stable/c/0904037e713f787d1376e1d349c3bdf6c3105881 -
  • () https://git.kernel.org/stable/c/c85b96eaf766d8f066b1139a17a51efa2f6627ef -

25 Mar 2026, 11:16

Type Values Removed Values Added
New CVE
Information

Published : 2026-03-25 11:16

Updated : 2026-04-24 18:21

NVD link : CVE-2026-23362

Mitre link : CVE-2026-23362

CVE.ORG link : CVE-2026-23362

JSON object : View

Products Affected

linux

  • linux_kernel
CWE
CWE-667

Improper Locking