FKIE_CVE-2022-50756

Vulnerability from fkie_nvd - Published: 2025-12-24 13:16 - Updated: 2026-06-17 05:24
Severity
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.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/9141144b37f30e3e7fa024bcfa0a13011e546ba9
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b1814724e0d7162bdf4799f2d565381bc2251c63
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c89a529e823d51dd23c7ec0c047c7a454a428541
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/dfb6d54893d544151e7f480bc44cfe7823f5ad23
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e1777b4286e526c58b4ee699344b0ad85aaf83a0
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/nvme/host/pci.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "dfb6d54893d544151e7f480bc44cfe7823f5ad23",
              "status": "affected",
              "version": "943e942e6266f22babee5efeb00f8f672fbff5bd",
              "versionType": "git"
            },
            {
              "lessThan": "9141144b37f30e3e7fa024bcfa0a13011e546ba9",
              "status": "affected",
              "version": "943e942e6266f22babee5efeb00f8f672fbff5bd",
              "versionType": "git"
            },
            {
              "lessThan": "e1777b4286e526c58b4ee699344b0ad85aaf83a0",
              "status": "affected",
              "version": "943e942e6266f22babee5efeb00f8f672fbff5bd",
              "versionType": "git"
            },
            {
              "lessThan": "b1814724e0d7162bdf4799f2d565381bc2251c63",
              "status": "affected",
              "version": "943e942e6266f22babee5efeb00f8f672fbff5bd",
              "versionType": "git"
            },
            {
              "lessThan": "c89a529e823d51dd23c7ec0c047c7a454a428541",
              "status": "affected",
              "version": "943e942e6266f22babee5efeb00f8f672fbff5bd",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/nvme/host/pci.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.18"
            },
            {
              "lessThan": "4.18",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.163",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.87",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.0.*",
              "status": "unaffected",
              "version": "6.0.17",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.3",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "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": "CVE-2022-50756",
  "lastModified": "2026-06-17T05:24:07.487",
  "metrics": {},
  "published": "2025-12-24T13:16:02.353",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/9141144b37f30e3e7fa024bcfa0a13011e546ba9"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/b1814724e0d7162bdf4799f2d565381bc2251c63"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/c89a529e823d51dd23c7ec0c047c7a454a428541"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/dfb6d54893d544151e7f480bc44cfe7823f5ad23"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/e1777b4286e526c58b4ee699344b0ad85aaf83a0"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Deferred"
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.