FKIE_CVE-2026-23362

Vulnerability from fkie_nvd - Published: 2026-03-25 11:16 - Updated: 2026-04-24 18:21
Severity ?
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Summary
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.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/0904037e713f787d1376e1d349c3bdf6c3105881Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/70e951afad4c025261fe3c952d2b07237e320a01Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/800f26f11ae37b17f58e0001f28a47dd75c26557Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/8215ba7bc99e84e66fd6938874ec4330a9d96518Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/8bcf2d847adb82b2c617456f6da17ac5e6c75285Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c35636e91e392e1540949bbc67932167cb48bc3aPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c85b96eaf766d8f066b1139a17a51efa2f6627efPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f0c349b2c21b220af5ba19f29b885e222958d796Patch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel 6.15
linux linux_kernel 7.0
linux linux_kernel 7.0
linux linux_kernel 7.0
linux linux_kernel 7.0
linux linux_kernel 7.0
linux linux_kernel 7.0
linux linux_kernel 7.0
To clipboard 

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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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      "lang": "es",
      "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\ncan: bcm: corregir el bloqueo para las actualizaciones en tiempo de ejecuci\u00f3n de bcm_op\n\nEl commit c2aba69d0c36 (\u0027can: bcm: a\u00f1adir bloqueo para las actualizaciones en tiempo de ejecuci\u00f3n de bcm_op\u0027) a\u00f1adi\u00f3 un bloqueo para algunas variables que pueden ser modificadas en tiempo de ejecuci\u00f3n al actualizar el bcm_op de env\u00edo con un nuevo comando TX_SETUP en bcm_tx_setup().\n\nNormalmente, el RX_SETUP solo maneja y filtra el tr\u00e1fico entrante con una excepci\u00f3n: Cuando la bandera RX_RTR_FRAME est\u00e1 establecida, se env\u00eda una trama CAN predefinida cuando se recibe una trama RTR espec\u00edfica. 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(). A\u00f1adir el spin_lock_init() faltante al asignar el bcm_op en bcm_rx_setup() para manejar el caso RTR correctamente."
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  "id": "CVE-2026-23362",
  "lastModified": "2026-04-24T18:21:28.463",
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          "confidentialityImpact": "NONE",
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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
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