ghsa-3xq3-w9mf-92jr
Vulnerability from github
Published
2025-09-11 18:35
Modified
2025-11-03 18:31
Details

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

RDMA: hfi1: fix possible divide-by-zero in find_hw_thread_mask()

The function divides number of online CPUs by num_core_siblings, and later checks the divider by zero. This implies a possibility to get and divide-by-zero runtime error. Fix it by moving the check prior to division. This also helps to save one indentation level.

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{
  "affected": [],
  "aliases": [
    "CVE-2025-39742"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-09-11T17:15:36Z",
    "severity": null
  },
  "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.",
  "id": "GHSA-3xq3-w9mf-92jr",
  "modified": "2025-11-03T18:31:40Z",
  "published": "2025-09-11T18:35:51Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-39742"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1a7cf828ed861de5be1aff99e10f114b363c19d3"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/31d0599a23efdbfe579bfbd1eb8f8c942f13744d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4b4317b0d758ff92ba96f4e448a8992a6fe607bf"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/59f7d2138591ef8f0e4e4ab5f1ab674e8181ad3a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/89fdac333a17ed990b41565630ef4791782e02f5"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9b05e91afe948ed819bf87d7ba0fccf451ed79a6"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9bba1a9994c523b44db64f63b564b4719ea2b7ef"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9d3211cb61a0773a2440d0a0698c1e6e7429f907"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ac53f377393cc85156afdc90b636e84e544a6f96"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}


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