FKIE_CVE-2025-68806

Vulnerability from fkie_nvd - Published: 2026-01-13 16:16 - Updated: 2026-07-30 06:24
Severity
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Summary
In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix buffer validation by including null terminator size in EA length The smb2_set_ea function, which handles Extended Attributes (EA), was performing buffer validation checks that incorrectly omitted the size of the null terminating character (+1 byte) for EA Name. This patch fixes the issue by explicitly adding '+ 1' to EaNameLength where the null terminator is expected to be present in the buffer, ensuring the validation accurately reflects the total required buffer size.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/6dc8cf6e7998ef7aeb9383a4c2904ea5d22fa2e4
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/95d7a890e4b03e198836d49d699408fd1867cb55
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a28a375a5439eb474e9f284509a407efb479c925
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/cae52c592a07e1d3fa3338a5f064a374a5f26750
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d26af6d14da43ab92d07bc60437c62901dc522e6
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/smb/server/smb2pdu.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "cae52c592a07e1d3fa3338a5f064a374a5f26750",
              "status": "affected",
              "version": "d070c4dd2a5bed4e9832eec5b6c029c7d14892ea",
              "versionType": "git"
            },
            {
              "lessThan": "a28a375a5439eb474e9f284509a407efb479c925",
              "status": "affected",
              "version": "0ba5439d9afa2722e7728df56f272c89987540a4",
              "versionType": "git"
            },
            {
              "lessThan": "d26af6d14da43ab92d07bc60437c62901dc522e6",
              "status": "affected",
              "version": "0ba5439d9afa2722e7728df56f272c89987540a4",
              "versionType": "git"
            },
            {
              "lessThan": "6dc8cf6e7998ef7aeb9383a4c2904ea5d22fa2e4",
              "status": "affected",
              "version": "0ba5439d9afa2722e7728df56f272c89987540a4",
              "versionType": "git"
            },
            {
              "lessThan": "95d7a890e4b03e198836d49d699408fd1867cb55",
              "status": "affected",
              "version": "0ba5439d9afa2722e7728df56f272c89987540a4",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "bb5bf157b5be1643cccc7cbbe57fcdef9ae52c2c",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "1a13ecb96230e8b7b91967e292836f7b01ec8111",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "404e7c01e16288b5e0171d1d8fd3328e806d0794",
              "versionType": "git"
            },
            {
              "lessThan": "6.1.160",
              "status": "affected",
              "version": "6.1.52",
              "versionType": "semver"
            },
            {
              "lessThan": "5.16",
              "status": "affected",
              "version": "5.15.131",
              "versionType": "semver"
            },
            {
              "lessThan": "6.5",
              "status": "affected",
              "version": "6.4.15",
              "versionType": "semver"
            },
            {
              "lessThan": "6.6",
              "status": "affected",
              "version": "6.5.2",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "fs/smb/server/smb2pdu.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.6"
            },
            {
              "lessThan": "6.6",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.160",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.120",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.64",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.3",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.19",
              "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\nksmbd: fix buffer validation by including null terminator size in EA length\n\nThe smb2_set_ea function, which handles Extended Attributes (EA),\nwas performing buffer validation checks that incorrectly omitted the size\nof the null terminating character (+1 byte) for EA Name.\nThis patch fixes the issue by explicitly adding \u0027+ 1\u0027 to EaNameLength where\nthe null terminator is expected to be present in the buffer, ensuring\nthe validation accurately reflects the total required buffer size."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nksmbd: corrige la validaci\u00f3n del b\u00fafer al incluir el tama\u00f1o del terminador nulo en la longitud de EA\n\nLa funci\u00f3n smb2_set_ea, que maneja los Atributos Extendidos (EA),\nestaba realizando comprobaciones de validaci\u00f3n del b\u00fafer que omit\u00edan incorrectamente el tama\u00f1o\ndel car\u00e1cter de terminaci\u00f3n nula (+1 byte) para el Nombre de EA.\nEste parche corrige el problema al a\u00f1adir expl\u00edcitamente \u0027+ 1\u0027 a EaNameLength donde\nse espera que el terminador nulo est\u00e9 presente en el b\u00fafer, asegurando\nque la validaci\u00f3n refleje con precisi\u00f3n el tama\u00f1o total de b\u00fafer requerido."
    }
  ],
  "id": "CVE-2025-68806",
  "lastModified": "2026-07-30T06:24:46.273",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 3.6,
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-01-13T16:16:02.747",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/6dc8cf6e7998ef7aeb9383a4c2904ea5d22fa2e4"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/95d7a890e4b03e198836d49d699408fd1867cb55"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/a28a375a5439eb474e9f284509a407efb479c925"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/cae52c592a07e1d3fa3338a5f064a374a5f26750"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/d26af6d14da43ab92d07bc60437c62901dc522e6"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Deferred"
}



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