Vulnerability-Lookup

GHSA-8XW7-J864-H87Q

Vulnerability from github – Published: 2025-04-16 15:34 – Updated: 2025-11-03 21:33

Details

In the Linux kernel, the following vulnerability has been resolved:

ksmbd: validate zero num_subauth before sub_auth is accessed

Access psid->sub_auth[psid->num_subauth - 1] without checking if num_subauth is non-zero leads to an out-of-bounds read. This patch adds a validation step to ensure num_subauth != 0 before sub_auth is accessed.

Severity

7.1 (High)


                  
                    CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

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{
  "affected": [],
  "aliases": [
    "CVE-2025-22038"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-125"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-04-16T15:15:56Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nksmbd: validate zero num_subauth before sub_auth is accessed\n\nAccess psid-\u003esub_auth[psid-\u003enum_subauth - 1] without checking\nif num_subauth is non-zero leads to an out-of-bounds read.\nThis patch adds a validation step to ensure num_subauth != 0\nbefore sub_auth is accessed.",
  "id": "GHSA-8xw7-j864-h87q",
  "modified": "2025-11-03T21:33:34Z",
  "published": "2025-04-16T15:34:40Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-22038"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0e36a3e080d6d8bd7a34e089345d043da4ac8283"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3ac65de111c686c95316ade660f8ba7aea3cd3cc"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/56de7778a48560278c334077ace7b9ac4bfb2fd1"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/68c6c3142bfcdb049839d40a9a59ebe8ea865002"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/bf21e29d78cd2c2371023953d9c82dfef82ebb36"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c8bfe1954a0b89e7b29b3a3e7f4c5e0ebd295e20"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2025-22038 (GCVE-0-2025-22038)

Vulnerability from cvelistv5 – Published: 2025-04-16 14:11 – Updated: 2026-08-05 11:56

Title

ksmbd: validate zero num_subauth before sub_auth is accessed

Summary

In the Linux kernel, the following vulnerability has been resolved: ksmbd: validate zero num_subauth before sub_auth is accessed Access psid->sub_auth[psid->num_subauth - 1] without checking if num_subauth is non-zero leads to an out-of-bounds read. This patch adds a validation step to ensure num_subauth != 0 before sub_auth is accessed.

Severity

8.3 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:H

7.1 (High)


                        
                          CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-10-01 18:13 UTC

CWE

CWE-125 - Out-of-bounds Read

Assigner

Linux CNA under the mitre root

CNA scorecard D 54/100 over 6624 records in the last 180 days details

References

7 references

URL	Tags
https://git.kernel.org/stable/c/3ac65de111c686c95…
https://git.kernel.org/stable/c/0e36a3e080d6d8bd7…
https://git.kernel.org/stable/c/56de7778a48560278…
https://git.kernel.org/stable/c/68c6c3142bfcdb049…
https://git.kernel.org/stable/c/c8bfe1954a0b89e7b…
https://git.kernel.org/stable/c/bf21e29d78cd2c237…
https://lists.debian.org/debian-lts-announce/2025…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 0626e6641f6b467447c81dd7678a69c66f7746cf , < 3ac65de111c686c95316ade660f8ba7aea3cd3cc (git) Affected: 0626e6641f6b467447c81dd7678a69c66f7746cf , < 0e36a3e080d6d8bd7a34e089345d043da4ac8283 (git) Affected: 0626e6641f6b467447c81dd7678a69c66f7746cf , < 56de7778a48560278c334077ace7b9ac4bfb2fd1 (git) Affected: 0626e6641f6b467447c81dd7678a69c66f7746cf , < 68c6c3142bfcdb049839d40a9a59ebe8ea865002 (git) Affected: 0626e6641f6b467447c81dd7678a69c66f7746cf , < c8bfe1954a0b89e7b29b3a3e7f4c5e0ebd295e20 (git) Affected: 0626e6641f6b467447c81dd7678a69c66f7746cf , < bf21e29d78cd2c2371023953d9c82dfef82ebb36 (git)
Linux	Linux	Affected: 5.15 Unaffected: 0 , < 5.15 (semver) Unaffected: 6.1.134 , ≤ 6.1.* (semver) Unaffected: 6.6.87 , ≤ 6.6.* (semver) Unaffected: 6.12.23 , ≤ 6.12.* (semver) Unaffected: 6.13.11 , ≤ 6.13.* (semver) Unaffected: 6.14.2 , ≤ 6.14.* (semver) Unaffected: 6.15 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "LOCAL",
              "availabilityImpact": "HIGH",
              "baseScore": 7.1,
              "baseSeverity": "HIGH",
              "confidentialityImpact": "HIGH",
              "integrityImpact": "NONE",
              "privilegesRequired": "LOW",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H",
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            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2025-22038",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-10-01T18:13:11.878668Z",
                "version": "2.0.3"
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              "type": "ssvc"
            }
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "cweId": "CWE-125",
                "description": "CWE-125 Out-of-bounds Read",
                "lang": "en",
                "type": "CWE"
              }
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        ],
        "providerMetadata": {
          "dateUpdated": "2025-10-01T18:13:16.440Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      },
      {
        "providerMetadata": {
          "dateUpdated": "2025-11-03T19:41:20.321Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
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        "references": [
          {
            "url": "https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html"
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      "affected": [
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          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
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              "versionType": "git"
            },
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            {
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          "versions": [
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              "version": "5.15"
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              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
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            {
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              "versionType": "semver"
            },
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                },
                {
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                  "versionStartIncluding": "5.15",
                  "vulnerable": true
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                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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GHSA-8XW7-J864-H87Q

CVE-2025-22038 (GCVE-0-2025-22038)

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Nomenclature

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