Vulnerability-Lookup

GHSA-4WFQ-6XP5-VP47

Vulnerability from github – Published: 2026-01-13 18:31 – Updated: 2026-01-13 18:31

Details

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.

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{
  "affected": [],
  "aliases": [
    "CVE-2025-68806"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-01-13T16:16:02Z",
    "severity": null
  },
  "details": "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.",
  "id": "GHSA-4wfq-6xp5-vp47",
  "modified": "2026-01-13T18:31:04Z",
  "published": "2026-01-13T18:31:04Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-68806"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6dc8cf6e7998ef7aeb9383a4c2904ea5d22fa2e4"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/95d7a890e4b03e198836d49d699408fd1867cb55"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a28a375a5439eb474e9f284509a407efb479c925"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/cae52c592a07e1d3fa3338a5f064a374a5f26750"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d26af6d14da43ab92d07bc60437c62901dc522e6"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2025-68806 (GCVE-0-2025-68806)

Vulnerability from cvelistv5 – Published: 2026-01-13 15:29 – Updated: 2026-01-14 08:51

Title

ksmbd: fix buffer validation by including null terminator size in EA length

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.

Severity ?

No CVSS data available.

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/cae52c592a07e1d3f…
	https://git.kernel.org/stable/c/a28a375a5439eb474…
	https://git.kernel.org/stable/c/d26af6d14da43ab92…
	https://git.kernel.org/stable/c/6dc8cf6e7998ef7ae…
	https://git.kernel.org/stable/c/95d7a890e4b03e198…

Impacted products

Vendor

Product

Version

Linux

Affected: d070c4dd2a5bed4e9832eec5b6c029c7d14892ea , < cae52c592a07e1d3fa3338a5f064a374a5f26750 (git)
Affected: 0ba5439d9afa2722e7728df56f272c89987540a4 , < a28a375a5439eb474e9f284509a407efb479c925 (git)
Affected: 0ba5439d9afa2722e7728df56f272c89987540a4 , < d26af6d14da43ab92d07bc60437c62901dc522e6 (git)
Affected: 0ba5439d9afa2722e7728df56f272c89987540a4 , < 6dc8cf6e7998ef7aeb9383a4c2904ea5d22fa2e4 (git)
Affected: 0ba5439d9afa2722e7728df56f272c89987540a4 , < 95d7a890e4b03e198836d49d699408fd1867cb55 (git)
Affected: bb5bf157b5be1643cccc7cbbe57fcdef9ae52c2c (git)
Affected: 1a13ecb96230e8b7b91967e292836f7b01ec8111 (git)
Affected: 404e7c01e16288b5e0171d1d8fd3328e806d0794 (git)

Linux

Affected: 6.6
Unaffected: 0 , < 6.6 (semver)
Unaffected: 6.1.160 , ≤ 6.1.* (semver)
Unaffected: 6.6.120 , ≤ 6.6.* (semver)
Unaffected: 6.12.64 , ≤ 6.12.* (semver)
Unaffected: 6.18.3 , ≤ 6.18.* (semver)
Unaffected: 6.19-rc2 , ≤ * (original_commit_for_fix)

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JSON

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        {
          "defaultStatus": "unaffected",
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          "programFiles": [
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          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.6"
            },
            {
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              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
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              "status": "unaffected",
              "version": "6.1.160",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.120",
              "versionType": "semver"
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            {
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              "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-rc2",
              "versionType": "original_commit_for_fix"
            }
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        }
      ],
      "cpeApplicability": [
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                  "versionStartIncluding": "6.4.15",
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          "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."
        }
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        "dateUpdated": "2026-01-14T08:51:38.039Z",
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        {
          "url": "https://git.kernel.org/stable/c/95d7a890e4b03e198836d49d699408fd1867cb55"
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    "datePublished": "2026-01-13T15:29:13.797Z",
    "dateReserved": "2025-12-24T10:30:51.045Z",
    "dateUpdated": "2026-01-14T08:51:38.039Z",
    "state": "PUBLISHED"
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}

Sightings

Author	Source	Type	Date

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.

Action not permitted

GHSA-4WFQ-6XP5-VP47

CVE-2025-68806 (GCVE-0-2025-68806)

Tags

Sightings

Nomenclature