CVE-2026-23362 (GCVE-0-2026-23362)
Vulnerability from cvelistv5
Published
2026-03-25 10:27
Modified
2026-04-18 08:58
Severity ?
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
Impacted products
Vendor Product Version
Linux Linux Version: 7595de7bc56e0e52b74e56c90f7e247bf626d628
Version: fbd8fdc2b218e979cfe422b139b8f74c12419d1f
Version: 2a437b86ac5a9893c902f30ef66815bf13587bf6
Version: 76c84c3728178b2d38d5604e399dfe8b0752645e
Version: cc55dd28c20a6611e30596019b3b2f636819a4c0
Version: c2aba69d0c36a496ab4f2e81e9c2b271f2693fd7
Version: c2aba69d0c36a496ab4f2e81e9c2b271f2693fd7
Version: c2aba69d0c36a496ab4f2e81e9c2b271f2693fd7
Version: 8f1c022541bf5a923c8d6fa483112c15250f30a4
Version: c4e8a172501e677ebd8ea9d9161d97dc4df56fbd
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{
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          "programFiles": [
            "net/can/bcm.c"
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      "descriptions": [
        {
          "lang": "en",
          "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."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-04-18T08:58:12.167Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/0904037e713f787d1376e1d349c3bdf6c3105881"
        },
        {
          "url": "https://git.kernel.org/stable/c/c85b96eaf766d8f066b1139a17a51efa2f6627ef"
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          "url": "https://git.kernel.org/stable/c/800f26f11ae37b17f58e0001f28a47dd75c26557"
        },
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          "url": "https://git.kernel.org/stable/c/70e951afad4c025261fe3c952d2b07237e320a01"
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        {
          "url": "https://git.kernel.org/stable/c/8bcf2d847adb82b2c617456f6da17ac5e6c75285"
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          "url": "https://git.kernel.org/stable/c/8215ba7bc99e84e66fd6938874ec4330a9d96518"
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        {
          "url": "https://git.kernel.org/stable/c/f0c349b2c21b220af5ba19f29b885e222958d796"
        },
        {
          "url": "https://git.kernel.org/stable/c/c35636e91e392e1540949bbc67932167cb48bc3a"
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      "title": "can: bcm: fix locking for bcm_op runtime updates",
      "x_generator": {
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  "cveMetadata": {
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-23362",
    "datePublished": "2026-03-25T10:27:45.476Z",
    "dateReserved": "2026-01-13T15:37:46.002Z",
    "dateUpdated": "2026-04-18T08:58:12.167Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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