nvme-pci: fix mempool alloc size

{
  "id": "4a9129633c2fa6164aee8bb5ef72fa00f6468ca5c9df3972300a0e4a8267c2e9",
  "url": "https://osv.dev/vulnerability/CVE-2022-50756",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "nvme-pci: fix mempool alloc size",
    "summary": "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.",
    "evidence": "osv:CVE-2022-50756",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "5.10.163",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "5.15.87",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.0.17",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.1.3",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "high",
    "structured": {
      "id": "CVE-2022-50756",
      "aliases": [
        "CVE-2022-50756"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
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              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
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                  "introduced": "943e942e6266f22babee5efeb00f8f672fbff5bd"
                },
                {
                  "fixed": "dfb6d54893d544151e7f480bc44cfe7823f5ad23"
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                  "fixed": "9141144b37f30e3e7fa024bcfa0a13011e546ba9"
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                  "fixed": "b1814724e0d7162bdf4799f2d565381bc2251c63"
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                {
                  "fixed": "c89a529e823d51dd23c7ec0c047c7a454a428541"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-50756.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "4.18.0"
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                {
                  "fixed": "5.10.163"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
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                  "introduced": "5.11.0"
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                  "fixed": "5.15.87"
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            {
              "type": "ECOSYSTEM",
              "events": [
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                  "introduced": "5.16.0"
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                {
                  "fixed": "6.0.17"
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            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.1.0"
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                {
                  "fixed": "6.1.3"
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              ]
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          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-50756.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:49.154764177Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/9141144b37f30e3e7fa024bcfa0a13011e546ba9",
        "https://git.kernel.org/stable/c/b1814724e0d7162bdf4799f2d565381bc2251c63",
        "https://git.kernel.org/stable/c/c89a529e823d51dd23c7ec0c047c7a454a428541",
        "https://git.kernel.org/stable/c/dfb6d54893d544151e7f480bc44cfe7823f5ad23",
        "https://git.kernel.org/stable/c/e1777b4286e526c58b4ee699344b0ad85aaf83a0",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/50xxx/CVE-2022-50756.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2022-50756",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/50xxx/CVE-2022-50756.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2022-50756",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 517234,
  "published_at": "2025-12-24T13:05:49.635+00:00"
}