{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2025-39742",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2025-39742"
  ],
  "published": "2025-09-11T16:52:56Z",
  "summary": "RDMA: hfi1: fix possible divide-by-zero in find_hw_thread_mask()",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA: hfi1: fix possible divide-by-zero in find_hw_thread_mask()\n\nThe function divides number of online CPUs by num_core_siblings, and\nlater checks the divider by zero. This implies a possibility to get\nand divide-by-zero runtime error. Fix it by moving the check prior to\ndivision. This also helps to save one indentation level.",
  "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": "6.1.149",
            "compiled_filter": false
          }
        }
      }
    }
  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2025-39742"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/9bba1a9994c523b44db64f63b564b4719ea2b7ef"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/1a7cf828ed861de5be1aff99e10f114b363c19d3"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/9d3211cb61a0773a2440d0a0698c1e6e7429f907"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/4b4317b0d758ff92ba96f4e448a8992a6fe607bf"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/89fdac333a17ed990b41565630ef4791782e02f5"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/9b05e91afe948ed819bf87d7ba0fccf451ed79a6"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/31d0599a23efdbfe579bfbd1eb8f8c942f13744d"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/ac53f377393cc85156afdc90b636e84e544a6f96"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/59f7d2138591ef8f0e4e4ab5f1ab674e8181ad3a"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-05-12T04:54:46Z"
  }
}