{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2023-52638",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2023-52638"
  ],
  "published": "2024-04-03T14:55:57Z",
  "summary": "can: j1939: prevent deadlock by changing j1939_socks_lock to rwlock",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ncan: j1939: prevent deadlock by changing j1939_socks_lock to rwlock\n\nThe following 3 locks would race against each other, causing the\ndeadlock situation in the Syzbot bug report:\n\n- j1939_socks_lock\n- active_session_list_lock\n- sk_session_queue_lock\n\nA reasonable fix is to change j1939_socks_lock to an rwlock, since in\nthe rare situations where a write lock is required for the linked list\nthat j1939_socks_lock is protecting, the code does not attempt to\nacquire any more locks. This would break the circular lock dependency,\nwhere, for example, the current thread already locks j1939_socks_lock\nand attempts to acquire sk_session_queue_lock, and at the same time,\nanother thread attempts to acquire j1939_socks_lock while holding\nsk_session_queue_lock.\n\nNOTE: This patch along does not fix the unregister_netdevice bug\nreported by Syzbot; instead, it solves a deadlock situation to prepare\nfor one or more further patches to actually fix the Syzbot bug, which\nappears to be a reference counting problem within the j1939 codebase.\n\n[mkl: remove unrelated newline change]",
  "affected": [
    {
      "package": {
        "ecosystem": "Raspberry Pi OS:12",
        "name": "linux"
      },
      "versions": [
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        "1:6.1.47-1+rpt2",
        "1:6.1.47-1+rpt4",
        "1:6.1.54-1+rpt2",
        "1:6.1.58-1+rpt2",
        "1:6.1.63-1+rpt1",
        "1:6.1.73-1+rpt1"
      ],
      "ecosystem_specific": {
        "binaries": [
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            "binary_name": "linux-image-6.1.0-rpi1-rpi-v6",
            "binary_version": "1:6.1.21-1+rpt1"
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            "binary_version": "1:6.1.21-1+rpt1"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi1-rpi-v7l",
            "binary_version": "1:6.1.21-1+rpt1"
          },
          {
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            "binary_version": "1:6.1.21-1+rpt1"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi2-rpi-v6",
            "binary_version": "1:6.1.47-1+rpt2"
          },
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            "binary_version": "1:6.1.47-1+rpt2"
          },
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            "binary_version": "1:6.1.47-1+rpt2"
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            "binary_version": "1:6.1.47-1+rpt4"
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            "binary_version": "1:6.1.54-1+rpt2"
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          },
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            "binary_version": "1:6.1.58-1+rpt2"
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            "assessment": "commit ancestry (strak rule)",
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            "assessment": "upstream version (no usable Linux commit)",
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            "assessment": "upstream version (no usable Linux commit)",
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    }
  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2023-52638"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/03358aba991668d3bb2c65b3c82aa32c36851170"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/aedda066d717a0b4335d7e0a00b2e3a61e40afcf"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/26dfe112ec2e95fe0099681f6aec33da13c2dd8e"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/559b6322f9480bff68cfa98d108991e945a4f284"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/6cdedc18ba7b9dacc36466e27e3267d201948c8d"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-05-12T04:54:46Z"
  }
}