FKIE_CVE-2025-68185

Vulnerability from fkie_nvd - Published: 2025-12-16 14:15 - Updated: 2026-10-14 13:10
Severity
Summary
In the Linux kernel, the following vulnerability has been resolved: nfs4_setup_readdir(): insufficient locking for ->d_parent->d_inode dereferencing Theoretically it's an oopsable race, but I don't believe one can manage to hit it on real hardware; might become doable on a KVM, but it still won't be easy to attack. Anyway, it's easy to deal with - since xdr_encode_hyper() is just a call of put_unaligned_be64(), we can put that under ->d_lock and be done with that.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/40be5b9080114f18b0cea386db415b68a7273c1a
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/504b3fb9948a9e96ebbabdee0d33966a8bab15cb
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/6025f641a0e30afdc5aa62017397b1860ad9f677
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a890a2e339b929dbd843328f9a92a1625404fe63
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e6cafe71eb3b5579b245ba1bd528a181e77f3df1
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/eacfd08b26a062f1095b18719715bc82ad35312e
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f5e570eaab36a110c6ffda32b87c51170990c2d1
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/fa4daf7d11e45b72aad5d943a7ab991f869fff79
Impacted products
Vendor Product Version
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{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/nfs/nfs4proc.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "6025f641a0e30afdc5aa62017397b1860ad9f677",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "e6cafe71eb3b5579b245ba1bd528a181e77f3df1",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "fa4daf7d11e45b72aad5d943a7ab991f869fff79",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "504b3fb9948a9e96ebbabdee0d33966a8bab15cb",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "eacfd08b26a062f1095b18719715bc82ad35312e",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "40be5b9080114f18b0cea386db415b68a7273c1a",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "f5e570eaab36a110c6ffda32b87c51170990c2d1",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "a890a2e339b929dbd843328f9a92a1625404fe63",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "fs/nfs/nfs4proc.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "2.6.12"
            },
            {
              "lessThan": "2.6.12",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.4.*",
              "status": "unaffected",
              "version": "5.4.302",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.247",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.197",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.159",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.117",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.58",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.17.*",
              "status": "unaffected",
              "version": "6.17.8",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.18",
              "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\nnfs4_setup_readdir(): insufficient locking for -\u003ed_parent-\u003ed_inode dereferencing\n\nTheoretically it\u0027s an oopsable race, but I don\u0027t believe one can manage\nto hit it on real hardware; might become doable on a KVM, but it still\nwon\u0027t be easy to attack.\n\nAnyway, it\u0027s easy to deal with - since xdr_encode_hyper() is just a call of\nput_unaligned_be64(), we can put that under -\u003ed_lock and be done with that."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nnfs4_setup_readdir(): bloqueo insuficiente para la desreferenciaci\u00f3n de  -\u003e d_parent -\u003e d_inode\n\nTe\u00f3ricamente es una condici\u00f3n de carrera que puede causar un \u0027oops\u0027, pero no creo que se pueda lograr activarla en hardware real; podr\u00eda volverse factible en un KVM, pero a\u00fan as\u00ed no ser\u00e1 f\u00e1cil de atacar.\n\nDe todos modos, es f\u00e1cil de solucionar: ya que xdr_encode_hyper() es solo una llamada a put_unaligned_be64(), podemos poner eso bajo  -\u003e d_lock y terminar con eso."
    }
  ],
  "id": "CVE-2025-68185",
  "lastModified": "2026-10-14T13:10:00.187",
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2025-68185",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-06-16T19:21:00.664758Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2025-12-16T14:15:51.113",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/40be5b9080114f18b0cea386db415b68a7273c1a"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/504b3fb9948a9e96ebbabdee0d33966a8bab15cb"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/6025f641a0e30afdc5aa62017397b1860ad9f677"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/a890a2e339b929dbd843328f9a92a1625404fe63"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/e6cafe71eb3b5579b245ba1bd528a181e77f3df1"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/eacfd08b26a062f1095b18719715bc82ad35312e"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/f5e570eaab36a110c6ffda32b87c51170990c2d1"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/fa4daf7d11e45b72aad5d943a7ab991f869fff79"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Deferred"
}



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