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can: mcp251x: fix deadlock if an interrupt occurs during mcp251x_open

Type: advisorySources: OSV

In the Linux kernel, the following vulnerability has been resolved: can: mcp251x: fix deadlock if an interrupt occurs during mcp251x_open The mcp251x_hw_wake() function is called with the mpc_lock mutex held and disables the interrupt handler so that no interrupts can be processed while waking the device. If an interrupt has already occurred then waiting for the interrupt handler to complete will deadlock because it will be trying to acquire the same mutex. CPU0 CPU1 ---- ---- mcp251x_open() mutex_lock(&priv->mcp_lock) request_threaded_irq() mcp251x_can_ist() mutex_lock(&priv->mcp_lock) mcp251x_hw_wake() disable_irq() <-- deadlock Use disable_irq_nosync() instead because the interrupt handler does everything while holding the mutex so it doesn't matter if it's still running.

Products
Kernel
Affected versions
Not specified
Fixed versions
5.10.226, 5.15.167, 6.1.110, 6.10.10, 6.6.51
CVEs
CVE-2024-46791
Confirmed fixed CVEs
Not specified
Updated in this feed
3 Nov 2026, 15:46 UTC · Revision 1

Source evidence

can: mcp251x: fix deadlock if an interrupt occurs during mcp251x_open

core-osv · Original source

Published 18 Sept 2024, 07:12 UTC

In the Linux kernel, the following vulnerability has been resolved: can: mcp251x: fix deadlock if an interrupt occurs during mcp251x_open The mcp251x_hw_wake() function is called with the mpc_lock mutex held and disables the interrupt handler so that no interrupts can be processed while waking the device. If an interrupt has already occurred then waiting for the interrupt handler to complete will deadlock because it will be trying to acquire the same mutex. CPU0 CPU1 ---- ---- mcp251x_open() mutex_lock(&priv->mcp_lock) request_threaded_irq() mcp251x_can_ist() mutex_lock(&priv->mcp_lock) mcp251x_hw_wake() disable_irq() <-- deadlock Use disable_irq_nosync() instead because the interrupt handler does everything while holding the mutex so it doesn't matter if it's still running.

osv:CVE-2024-46791

Kernel

Fixed versions: 5.10.226, 5.15.167, 6.1.110, 6.6.51, 6.10.10

Complete source record
{
  "id": "49530d101053a2701b18fc5428361121d250d34e6e106a832dcc896d88a0740b",
  "url": "https://osv.dev/vulnerability/CVE-2024-46791",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "can: mcp251x: fix deadlock if an interrupt occurs during mcp251x_open",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: can: mcp251x: fix deadlock if an interrupt occurs during mcp251x_open The mcp251x_hw_wake() function is called with the mpc_lock mutex held and disables the interrupt handler so that no interrupts can be processed while waking the device. If an interrupt has already occurred then waiting for the interrupt handler to complete will deadlock because it will be trying to acquire the same mutex. CPU0 CPU1 ---- ---- mcp251x_open() mutex_lock(&priv->mcp_lock) request_threaded_irq() mcp251x_can_ist() mutex_lock(&priv->mcp_lock) mcp251x_hw_wake() disable_irq() <-- deadlock Use disable_irq_nosync() instead because the interrupt handler does everything while holding the mutex so it doesn't matter if it's still running.",
    "evidence": "osv:CVE-2024-46791",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "5.10.226",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "5.15.167",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.1.110",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.6.51",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.10.10",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2024-46791",
      "aliases": [
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      "affected": [
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              "type": "GIT",
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                {
                  "fixed": "e554113a1cd2a9cfc6c7af7bdea2141c5757e188"
                },
                {
                  "fixed": "7dd9c26bd6cf679bcfdef01a8659791aa6487a29"
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              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-46791.json"
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              "type": "ECOSYSTEM",
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            {
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                  "introduced": "5.16.0"
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                {
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              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
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                  "introduced": "6.2.0"
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          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-46791.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:30.298030671Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/3a49b6b1caf5cefc05264d29079d52c99cb188e0",
        "https://git.kernel.org/stable/c/513c8fc189b52f7922e36bdca58997482b198f0e",
        "https://git.kernel.org/stable/c/7dd9c26bd6cf679bcfdef01a8659791aa6487a29",
        "https://git.kernel.org/stable/c/8fecde9c3f9a4b97b68bb97c9f47e5b662586ba7",
        "https://git.kernel.org/stable/c/e554113a1cd2a9cfc6c7af7bdea2141c5757e188",
        "https://git.kernel.org/stable/c/f7ab9e14b23a3eac6714bdc4dba244d8aa1ef646",
        "https://lists.debian.org/debian-lts-announce/2024/10/msg00003.html",
        "https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/46xxx/CVE-2024-46791.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2024-46791",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/46xxx/CVE-2024-46791.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2024-46791",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 496972,
  "published_at": "2024-09-18T07:12:46.677+00:00"
}