Vulnerability-Lookup

GHSA-72GQ-5J57-9667

Vulnerability from github – Published: 2026-09-17 18:31 – Updated: 2026-09-17 18:31

Details

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

smb/server: fix null-ptr-deref in ksmbd_ipc_tree_connect_request()

See the procedure below:

ksmbd_tree_conn_connect ksmbd_share_config_get share->name = kstrdup() // fail if (!test_share_config_flag(share, KSMBD_SHARE_FLAG_PIPE)) // false // do not check share->name ksmbd_ipc_tree_connect_request strlen(share->name) // null-ptr-deref

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{
  "affected": [],
  "aliases": [
    "CVE-2026-90166"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-09-17T17:17:09Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nsmb/server: fix null-ptr-deref in ksmbd_ipc_tree_connect_request()\n\nSee the procedure below:\n\n  ksmbd_tree_conn_connect\n    ksmbd_share_config_get\n      share-\u003ename = kstrdup() // fail\n      if (!test_share_config_flag(share, KSMBD_SHARE_FLAG_PIPE)) // false\n      // do not check `share-\u003ename`\n    ksmbd_ipc_tree_connect_request\n      strlen(share-\u003ename) // null-ptr-deref",
  "id": "GHSA-72gq-5j57-9667",
  "modified": "2026-09-17T18:31:53Z",
  "published": "2026-09-17T18:31:53Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-90166"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4eb74a34ea401abfbbd5991076715dae3de938df"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7065d3648b1a48d2c49da3d6364dd3c4d503b10c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8461f27902727ad434375caf13a0100aafc0340f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d2ccf905f47d2344270749f4dfa905afcd3edeb0"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-90166 (GCVE-0-2026-90166)

Vulnerability from cvelistv5 – Published: 2026-09-17 16:06 – Updated: 2026-09-17 16:06

Title

smb/server: fix null-ptr-deref in ksmbd_ipc_tree_connect_request()

Summary

In the Linux kernel, the following vulnerability has been resolved: smb/server: fix null-ptr-deref in ksmbd_ipc_tree_connect_request() See the procedure below: ksmbd_tree_conn_connect ksmbd_share_config_get share->name = kstrdup() // fail if (!test_share_config_flag(share, KSMBD_SHARE_FLAG_PIPE)) // false // do not check `share->name` ksmbd_ipc_tree_connect_request strlen(share->name) // null-ptr-deref

Severity

No CVSS data available.

Assigner

Linux mitre root

References

4 references

URL	Tags
https://git.kernel.org/stable/c/4eb74a34ea401abfb…
https://git.kernel.org/stable/c/8461f27902727ad43…
https://git.kernel.org/stable/c/7065d3648b1a48d2c…
https://git.kernel.org/stable/c/d2ccf905f47d23442…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 , < 4eb74a34ea401abfbbd5991076715dae3de938df (git) Affected: e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 , < 8461f27902727ad434375caf13a0100aafc0340f (git) Affected: e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 , < 7065d3648b1a48d2c49da3d6364dd3c4d503b10c (git) Affected: e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 , < d2ccf905f47d2344270749f4dfa905afcd3edeb0 (git)
Linux	Linux	Affected: 5.15 Unaffected: 0 , < 5.15 (semver) Unaffected: 6.12.110 , ≤ 6.12.* (semver) Unaffected: 6.18.52 , ≤ 6.18.* (semver) Unaffected: 7.2.6 , ≤ 7.2.* (semver) Unaffected: 7.3-rc1 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/smb/server/mgmt/share_config.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "4eb74a34ea401abfbbd5991076715dae3de938df",
              "status": "affected",
              "version": "e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9",
              "versionType": "git"
            },
            {
              "lessThan": "8461f27902727ad434375caf13a0100aafc0340f",
              "status": "affected",
              "version": "e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9",
              "versionType": "git"
            },
            {
              "lessThan": "7065d3648b1a48d2c49da3d6364dd3c4d503b10c",
              "status": "affected",
              "version": "e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9",
              "versionType": "git"
            },
            {
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              "status": "affected",
              "version": "e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "fs/smb/server/mgmt/share_config.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": "6.12.110",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.52",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.6",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3-rc1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.110",
                  "versionStartIncluding": "5.15",
                  "vulnerable": true
                },
                {
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                  "versionEndExcluding": "6.18.52",
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                },
                {
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                  "vulnerable": true
                }
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              "negate": false,
              "operator": "OR"
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        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsmb/server: fix null-ptr-deref in ksmbd_ipc_tree_connect_request()\n\nSee the procedure below:\n\n  ksmbd_tree_conn_connect\n    ksmbd_share_config_get\n      share-\u003ename = kstrdup() // fail\n      if (!test_share_config_flag(share, KSMBD_SHARE_FLAG_PIPE)) // false\n      // do not check `share-\u003ename`\n    ksmbd_ipc_tree_connect_request\n      strlen(share-\u003ename) // null-ptr-deref"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-17T16:06:55.863Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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      "references": [
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        {
          "url": "https://git.kernel.org/stable/c/d2ccf905f47d2344270749f4dfa905afcd3edeb0"
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      ],
      "title": "smb/server: fix null-ptr-deref in ksmbd_ipc_tree_connect_request()",
      "x_generator": {
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    }
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-90166",
    "datePublished": "2026-09-17T16:06:55.863Z",
    "dateReserved": "2026-09-11T19:38:34.790Z",
    "dateUpdated": "2026-09-17T16:06:55.863Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

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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.

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GHSA-72GQ-5J57-9667

CVE-2026-90166 (GCVE-0-2026-90166)

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