GHSA-F94P-FCWW-CPFJ

Vulnerability from github – Published: 2026-03-25 12:30 – Updated: 2026-04-24 21:31
VLAI?
Details

In the Linux kernel, the following vulnerability has been resolved:

can: mcp251x: fix deadlock in error path of mcp251x_open

The mcp251x_open() function call free_irq() in its error path with the mpc_lock mutex held. But if an interrupt already occurred the interrupt handler will be waiting for the mpc_lock and free_irq() will deadlock waiting for the handler to finish.

This issue is similar to the one fixed in commit 7dd9c26bd6cf ("can: mcp251x: fix deadlock if an interrupt occurs during mcp251x_open") but for the error path.

To solve this issue move the call to free_irq() after the lock is released. Setting priv->force_quit = 1 beforehand ensure that the IRQ handler will exit right away once it acquired the lock.

Severity ?
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
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{
  "affected": [],
  "aliases": [
    "CVE-2026-23357"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-667"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-03-25T11:16:34Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ncan: mcp251x: fix deadlock in error path of mcp251x_open\n\nThe mcp251x_open() function call free_irq() in its error path with the\nmpc_lock mutex held. But if an interrupt already occurred the\ninterrupt handler will be waiting for the mpc_lock and free_irq() will\ndeadlock waiting for the handler to finish.\n\nThis issue is similar to the one fixed in commit 7dd9c26bd6cf (\"can:\nmcp251x: fix deadlock if an interrupt occurs during mcp251x_open\") but\nfor the error path.\n\nTo solve this issue move the call to free_irq() after the lock is\nreleased. Setting `priv-\u003eforce_quit = 1` beforehand ensure that the IRQ\nhandler will exit right away once it acquired the lock.",
  "id": "GHSA-f94p-fcww-cpfj",
  "modified": "2026-04-24T21:31:56Z",
  "published": "2026-03-25T12:30:23Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-23357"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/256f0cff6e946c570392bda1d01a65e789a7afd0"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/38063cc435b69d56e76f947c10d336fcb2953508"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/416c18ecddafab0ed09be1e7b9d2f448f3d4db16"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/739454057572cb0948658d1142f3fa2c6966465c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ab3f894de216f4a62adc3b57e9191888cbf26885"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b73832292cd914e87a55e863ba4413a907e7db6b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d27f12c3f5e85efc479896af4a69eccb37f75e8e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e728f444c913a91d290d1824b4770780bbd6378e"
    }
  ],
  "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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