ghsa-j2wx-wqf4-px3j
Vulnerability from github
Published
2025-12-24 15:30
Modified
2025-12-24 15:30
Details

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

nvme-pci: fix mempool alloc size

Convert the max size to bytes to match the units of the divisor that calculates the worst-case number of PRP entries.

The result is used to determine how many PRP Lists are required. The code was previously rounding this to 1 list, but we can require 2 in the worst case. In that scenario, the driver would corrupt memory beyond the size provided by the mempool.

While unlikely to occur (you'd need a 4MB in exactly 127 phys segments on a queue that doesn't support SGLs), this memory corruption has been observed by kfence.

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{
  "affected": [],
  "aliases": [
    "CVE-2022-50756"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-12-24T13:16:02Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnvme-pci: fix mempool alloc size\n\nConvert the max size to bytes to match the units of the divisor that\ncalculates the worst-case number of PRP entries.\n\nThe result is used to determine how many PRP Lists are required. The\ncode was previously rounding this to 1 list, but we can require 2 in the\nworst case. In that scenario, the driver would corrupt memory beyond the\nsize provided by the mempool.\n\nWhile unlikely to occur (you\u0027d need a 4MB in exactly 127 phys segments\non a queue that doesn\u0027t support SGLs), this memory corruption has been\nobserved by kfence.",
  "id": "GHSA-j2wx-wqf4-px3j",
  "modified": "2025-12-24T15:30:34Z",
  "published": "2025-12-24T15:30:34Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-50756"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9141144b37f30e3e7fa024bcfa0a13011e546ba9"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b1814724e0d7162bdf4799f2d565381bc2251c63"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c89a529e823d51dd23c7ec0c047c7a454a428541"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/dfb6d54893d544151e7f480bc44cfe7823f5ad23"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e1777b4286e526c58b4ee699344b0ad85aaf83a0"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}


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