GHSA-57PC-F5J8-25X4
Vulnerability from github – Published: 2026-03-25 12:30 – Updated: 2026-04-24 18:30In 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.
{
"affected": [],
"aliases": [
"CVE-2026-23362"
],
"database_specific": {
"cwe_ids": [
"CWE-667"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-03-25T11:16:35Z",
"severity": "MODERATE"
},
"details": "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.",
"id": "GHSA-57pc-f5j8-25x4",
"modified": "2026-04-24T18:30:40Z",
"published": "2026-03-25T12:30:24Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-23362"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/0904037e713f787d1376e1d349c3bdf6c3105881"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/70e951afad4c025261fe3c952d2b07237e320a01"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/800f26f11ae37b17f58e0001f28a47dd75c26557"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/8215ba7bc99e84e66fd6938874ec4330a9d96518"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/8bcf2d847adb82b2c617456f6da17ac5e6c75285"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/c35636e91e392e1540949bbc67932167cb48bc3a"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/c85b96eaf766d8f066b1139a17a51efa2f6627ef"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/f0c349b2c21b220af5ba19f29b885e222958d796"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
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