CVE-2026-23362
Estado: AnalizadaMedia (5.5)—
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.
CVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- Puntuación base: 5.5
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.10%
- Percentil entre todas las CVEs puntuadas: 1
- Fecha de la puntuación: 5/10/2026
EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).
Tecnologías afectadas (1)
CWE
- CWE-667
Referencias
- https://git.kernel.org/stable/c/0904037e713f787d1376e1d349c3bdf6c3105881
- https://git.kernel.org/stable/c/70e951afad4c025261fe3c952d2b07237e320a01
- https://git.kernel.org/stable/c/800f26f11ae37b17f58e0001f28a47dd75c26557
- https://git.kernel.org/stable/c/8215ba7bc99e84e66fd6938874ec4330a9d96518
- https://git.kernel.org/stable/c/8bcf2d847adb82b2c617456f6da17ac5e6c75285
- https://git.kernel.org/stable/c/c35636e91e392e1540949bbc67932167cb48bc3a
- https://git.kernel.org/stable/c/c85b96eaf766d8f066b1139a17a51efa2f6627ef
- https://git.kernel.org/stable/c/f0c349b2c21b220af5ba19f29b885e222958d796
JSON original (NVD)
Mostrar
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncan: bcm: fix locking for bcm_op runtime updates\n\nCommit c2aba69d0c36 (\"can: bcm: add locking for bcm_op runtime updates\")\nadded a locking for some variables that can be modified at runtime when\nupdating the sending bcm_op with a new TX_SETUP command in bcm_tx_setup().\n\nUsually the RX_SETUP only handles and filters incoming traffic with one\nexception: When the RX_RTR_FRAME flag is set a predefined CAN frame is\nsent when a specific RTR frame is received. Therefore the rx bcm_op uses\nbcm_can_tx() which uses the bcm_tx_lock that was only initialized in\nbcm_tx_setup(). Add the missing spin_lock_init() when allocating the\nbcm_op in bcm_rx_setup() to handle the RTR case properly."
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"value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\ncan: bcm: corregir el bloqueo para las actualizaciones en tiempo de ejecución de bcm_op\n\nEl 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().\n\nNormalmente, 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."
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