github - ghsa-gvg4-xh6r-ggrp

GHSA-GVG4-XH6R-GGRP

Vulnerability from github – Published: 2025-04-16 15:34 – Updated: 2025-09-19 15:31

Details

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

ksmbd: fix null pointer dereference in alloc_preauth_hash()

The Client send malformed smb2 negotiate request. ksmbd return error response. Subsequently, the client can send smb2 session setup even thought conn->preauth_info is not allocated. This patch add KSMBD_SESS_NEED_SETUP status of connection to ignore session setup request if smb2 negotiate phase is not complete.

Severity ?

5.5 (Medium)


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

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{
  "affected": [],
  "aliases": [
    "CVE-2025-22037"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-476"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-04-16T15:15:56Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nksmbd: fix null pointer dereference in alloc_preauth_hash()\n\nThe Client send malformed smb2 negotiate request. ksmbd return error\nresponse. Subsequently, the client can send smb2 session setup even\nthought conn-\u003epreauth_info is not allocated.\nThis patch add KSMBD_SESS_NEED_SETUP status of connection to ignore\nsession setup request if smb2 negotiate phase is not complete.",
  "id": "GHSA-gvg4-xh6r-ggrp",
  "modified": "2025-09-19T15:31:07Z",
  "published": "2025-04-16T15:34:40Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-22037"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8f216b33a5e1b3489c073b1ea1b3d7cb63c8dc4d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b8eb243e670ecf30e91524dd12f7260dac07d335"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c8b5b7c5da7d0c31c9b7190b4a7bba5281fc4780"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ca8bed31edf728a662ef9d6f39f50e7a7dc2b5ad"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/cce57cd8c5dead24127cf2308fdd60fcad2d6ba6"
    },
    {
      "type": "WEB",
      "url": "https://www.zerodayinitiative.com/advisories/ZDI-25-310"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2025-22037 (GCVE-0-2025-22037)

Vulnerability from cvelistv5 – Published: 2025-04-16 14:11 – Updated: 2025-09-19 14:53

Title

ksmbd: fix null pointer dereference in alloc_preauth_hash()

Summary

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix null pointer dereference in alloc_preauth_hash() The Client send malformed smb2 negotiate request. ksmbd return error response. Subsequently, the client can send smb2 session setup even thought conn->preauth_info is not allocated. This patch add KSMBD_SESS_NEED_SETUP status of connection to ignore session setup request if smb2 negotiate phase is not complete.

Severity ?

No CVSS data available.

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/cce57cd8c5dead241…
	https://git.kernel.org/stable/c/ca8bed31edf728a66…
	https://git.kernel.org/stable/c/8f216b33a5e1b3489…
	https://git.kernel.org/stable/c/b8eb243e670ecf30e…
	https://git.kernel.org/stable/c/c8b5b7c5da7d0c31c…
	https://www.zerodayinitiative.com/advisories/ZDI-…

Impacted products

Vendor

Product

Version

Linux

Affected: 0626e6641f6b467447c81dd7678a69c66f7746cf , < cce57cd8c5dead24127cf2308fdd60fcad2d6ba6 (git)
Affected: 0626e6641f6b467447c81dd7678a69c66f7746cf , < ca8bed31edf728a662ef9d6f39f50e7a7dc2b5ad (git)
Affected: 0626e6641f6b467447c81dd7678a69c66f7746cf , < 8f216b33a5e1b3489c073b1ea1b3d7cb63c8dc4d (git)
Affected: 0626e6641f6b467447c81dd7678a69c66f7746cf , < b8eb243e670ecf30e91524dd12f7260dac07d335 (git)
Affected: 0626e6641f6b467447c81dd7678a69c66f7746cf , < c8b5b7c5da7d0c31c9b7190b4a7bba5281fc4780 (git)

Linux

Affected: 5.15
Unaffected: 0 , < 5.15 (semver)
Unaffected: 6.6.107 , ≤ 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": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/smb/server/connection.h",
            "fs/smb/server/mgmt/user_session.c",
            "fs/smb/server/smb2pdu.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "cce57cd8c5dead24127cf2308fdd60fcad2d6ba6",
              "status": "affected",
              "version": "0626e6641f6b467447c81dd7678a69c66f7746cf",
              "versionType": "git"
            },
            {
              "lessThan": "ca8bed31edf728a662ef9d6f39f50e7a7dc2b5ad",
              "status": "affected",
              "version": "0626e6641f6b467447c81dd7678a69c66f7746cf",
              "versionType": "git"
            },
            {
              "lessThan": "8f216b33a5e1b3489c073b1ea1b3d7cb63c8dc4d",
              "status": "affected",
              "version": "0626e6641f6b467447c81dd7678a69c66f7746cf",
              "versionType": "git"
            },
            {
              "lessThan": "b8eb243e670ecf30e91524dd12f7260dac07d335",
              "status": "affected",
              "version": "0626e6641f6b467447c81dd7678a69c66f7746cf",
              "versionType": "git"
            },
            {
              "lessThan": "c8b5b7c5da7d0c31c9b7190b4a7bba5281fc4780",
              "status": "affected",
              "version": "0626e6641f6b467447c81dd7678a69c66f7746cf",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "fs/smb/server/connection.h",
            "fs/smb/server/mgmt/user_session.c",
            "fs/smb/server/smb2pdu.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": "6.6.*",
              "status": "unaffected",
              "version": "6.6.107",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.23",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.13.*",
              "status": "unaffected",
              "version": "6.13.11",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.14.*",
              "status": "unaffected",
              "version": "6.14.2",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.15",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.107",
                  "versionStartIncluding": "5.15",
                  "vulnerable": true
                },
                {
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                },
                {
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                },
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                },
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                  "versionEndExcluding": "6.15",
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                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nksmbd: fix null pointer dereference in alloc_preauth_hash()\n\nThe Client send malformed smb2 negotiate request. ksmbd return error\nresponse. Subsequently, the client can send smb2 session setup even\nthought conn-\u003epreauth_info is not allocated.\nThis patch add KSMBD_SESS_NEED_SETUP status of connection to ignore\nsession setup request if smb2 negotiate phase is not complete."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-09-19T14:53:58.094Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
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          "url": "https://git.kernel.org/stable/c/cce57cd8c5dead24127cf2308fdd60fcad2d6ba6"
        },
        {
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        },
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          "url": "https://git.kernel.org/stable/c/8f216b33a5e1b3489c073b1ea1b3d7cb63c8dc4d"
        },
        {
          "url": "https://git.kernel.org/stable/c/b8eb243e670ecf30e91524dd12f7260dac07d335"
        },
        {
          "url": "https://git.kernel.org/stable/c/c8b5b7c5da7d0c31c9b7190b4a7bba5281fc4780"
        },
        {
          "url": "https://www.zerodayinitiative.com/advisories/ZDI-25-310/"
        }
      ],
      "title": "ksmbd: fix null pointer dereference in alloc_preauth_hash()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-22037",
    "datePublished": "2025-04-16T14:11:55.670Z",
    "dateReserved": "2024-12-29T08:45:45.809Z",
    "dateUpdated": "2025-09-19T14:53:58.094Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

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-GVG4-XH6R-GGRP

CVE-2025-22037 (GCVE-0-2025-22037)

Tags

Sightings

Nomenclature