{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2026-90209",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2026-90209"
  ],
  "published": "2026-09-17T16:10:40Z",
  "summary": "s390/debug: Fix deadlock during unregister",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ns390/debug: Fix deadlock during unregister\n\nUnregistering an s390dbf debug area while one of the associated debugfs\nfiles is being written to can cause a deadlock:\n\n$ echo >.../vmur/level    $ rmmod vmur\n===================================================\ndebugfs write\ndebugfs_file_get()\n                          debug_unregister()\n                          mutex_lock(debug_mutex)\n                          debugfs_remove()\n                          wait for debugfs_file_put()\ndebug_file_ops.write()\ndebug_input()\nmutex_lock(debug_mutex) ==> DEADLOCK\n\nFix this by splitting debug_unregister() into an s390dbf and debugfs\npart, and running only the s390dbf part with debug_mutex locked.",
  "affected": [
    {
      "package": {
        "ecosystem": "Raspberry Pi OS:12",
        "name": "linux"
      },
      "versions": [
        "1:6.1.47-1+rpt4"
      ],
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-2712",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v6",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v7",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v7l",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v8",
            "binary_version": "1:6.1.47-1+rpt4"
          }
        ]
      },
      "database_specific": {
        "per_version": {
          "1:6.1.47-1+rpt4": {
            "linux_commit": "655fc658a15ae7a6f37103754adb39ba52a9a14e",
            "upstream_version": "6.1.47",
            "assessment": "commit ancestry (strak rule)",
            "upstream_fixed": "6.1.188",
            "compiled_filter": false
          }
        }
      }
    }
  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-90209"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/a214c3dacc779b2afcb0ac9c8001e45ee4ffb2ed"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/183f8f6d64bb0510070c856b9927618c53014a7b"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/a08b70ed2d1ec907353a72f15163b8e34ff4b2f8"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/45bb341d1b73eb293e0dd43d9b72bbc8b615d0ba"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/5d83f3faa3fb7f23f298cfd40382611999de5d1d"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/54e1259b75d6402a1d0cfb822b9bb2c507e53dab"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/445c31ac638fd1af203d79bdf25fc0cb3149fbbc"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-09-17T16:10:40Z"
  }
}