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GHSA-VPC3-747G-G72V

Vulnerability from github – Published: 2026-09-25 12:31 – Updated: 2026-09-25 12:31

Details

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

ksmbd: rate limit unmapped SID errors

A client can include many structurally valid but unmapped SIDs in a DACL. Logging every mapping failure lets one request generate hundreds of kernel error messages.

Rate limit the message to prevent an authenticated client from flooding the kernel log.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-98113"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-09-25T11:17:42Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nksmbd: rate limit unmapped SID errors\n\nA client can include many structurally valid but unmapped SIDs in a DACL.\nLogging every mapping failure lets one request generate hundreds of kernel\nerror messages.\n\nRate limit the message to prevent an authenticated client from flooding\nthe kernel log.",
  "id": "GHSA-vpc3-747g-g72v",
  "modified": "2026-09-25T12:31:37Z",
  "published": "2026-09-25T12:31:37Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-98113"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/13af319c1efec0b45fb5c1b16830eb0888b3fd1e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/30dbb08777b9a611d7d9193c040f382fbd0e7562"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/54cb2a909996346ac6a8a3beac96c07b3dcba584"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/feca5e70fc963b088377b20879e8cd8237c2fd7d"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-98113 (GCVE-0-2026-98113)

Vulnerability from cvelistv5 – Published: 2026-09-25 10:35 – Updated: 2026-09-25 10:35

Title

ksmbd: rate limit unmapped SID errors

Summary

In the Linux kernel, the following vulnerability has been resolved: ksmbd: rate limit unmapped SID errors A client can include many structurally valid but unmapped SIDs in a DACL. Logging every mapping failure lets one request generate hundreds of kernel error messages. Rate limit the message to prevent an authenticated client from flooding the kernel log.

Severity

No CVSS data available.

Assigner

Linux mitre root

References

4 references

URL	Tags
https://git.kernel.org/stable/c/13af319c1efec0b45…
https://git.kernel.org/stable/c/30dbb08777b9a611d…
https://git.kernel.org/stable/c/54cb2a909996346ac…
https://git.kernel.org/stable/c/feca5e70fc963b088…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 , < 13af319c1efec0b45fb5c1b16830eb0888b3fd1e (git) Affected: e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 , < 30dbb08777b9a611d7d9193c040f382fbd0e7562 (git) Affected: e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 , < 54cb2a909996346ac6a8a3beac96c07b3dcba584 (git) Affected: e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 , < feca5e70fc963b088377b20879e8cd8237c2fd7d (git)
Linux	Linux	Affected: 5.15 Unaffected: 0 , < 5.15 (semver) Unaffected: 6.12.111 , ≤ 6.12.* (semver) Unaffected: 6.18.53 , ≤ 6.18.* (semver) Unaffected: 7.2.7 , ≤ 7.2.* (semver) Unaffected: 7.3-rc2 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/smb/server/smbacl.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "13af319c1efec0b45fb5c1b16830eb0888b3fd1e",
              "status": "affected",
              "version": "e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9",
              "versionType": "git"
            },
            {
              "lessThan": "30dbb08777b9a611d7d9193c040f382fbd0e7562",
              "status": "affected",
              "version": "e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9",
              "versionType": "git"
            },
            {
              "lessThan": "54cb2a909996346ac6a8a3beac96c07b3dcba584",
              "status": "affected",
              "version": "e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9",
              "versionType": "git"
            },
            {
              "lessThan": "feca5e70fc963b088377b20879e8cd8237c2fd7d",
              "status": "affected",
              "version": "e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "fs/smb/server/smbacl.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.15"
            },
            {
              "lessThan": "5.15",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.111",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.53",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.7",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3-rc2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.111",
                  "versionStartIncluding": "5.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.53",
                  "versionStartIncluding": "5.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2.7",
                  "versionStartIncluding": "5.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.3-rc2",
                  "versionStartIncluding": "5.15",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nksmbd: rate limit unmapped SID errors\n\nA client can include many structurally valid but unmapped SIDs in a DACL.\nLogging every mapping failure lets one request generate hundreds of kernel\nerror messages.\n\nRate limit the message to prevent an authenticated client from flooding\nthe kernel log."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-25T10:35:59.909Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/13af319c1efec0b45fb5c1b16830eb0888b3fd1e"
        },
        {
          "url": "https://git.kernel.org/stable/c/30dbb08777b9a611d7d9193c040f382fbd0e7562"
        },
        {
          "url": "https://git.kernel.org/stable/c/54cb2a909996346ac6a8a3beac96c07b3dcba584"
        },
        {
          "url": "https://git.kernel.org/stable/c/feca5e70fc963b088377b20879e8cd8237c2fd7d"
        }
      ],
      "title": "ksmbd: rate limit unmapped SID errors",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-98113",
    "datePublished": "2026-09-25T10:35:59.909Z",
    "dateReserved": "2026-09-25T10:25:14.316Z",
    "dateUpdated": "2026-09-25T10:35:59.909Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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-VPC3-747G-G72V

CVE-2026-98113 (GCVE-0-2026-98113)

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