github - ghsa-f39w-x49r-j8p2

GHSA-F39W-X49R-J8P2

Vulnerability from github – Published: 2025-12-30 15:30 – Updated: 2025-12-30 15:30

Details

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

ksmbd: avoid out of bounds access in decode_preauth_ctxt()

Confirm that the accessed pneg_ctxt->HashAlgorithms address sits within the SMB request boundary; deassemble_neg_contexts() only checks that the eight byte smb2_neg_context header + (client controlled) DataLength are within the packet boundary, which is insufficient.

Checking for sizeof(struct smb2_preauth_neg_context) is overkill given that the type currently assumes SMB311_SALT_SIZE bytes of trailing Salt.

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2023-54250"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-12-30T13:16:13Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nksmbd: avoid out of bounds access in decode_preauth_ctxt()\n\nConfirm that the accessed pneg_ctxt-\u003eHashAlgorithms address sits within\nthe SMB request boundary; deassemble_neg_contexts() only checks that the\neight byte smb2_neg_context header + (client controlled) DataLength are\nwithin the packet boundary, which is insufficient.\n\nChecking for sizeof(struct smb2_preauth_neg_context) is overkill given\nthat the type currently assumes SMB311_SALT_SIZE bytes of trailing Salt.",
  "id": "GHSA-f39w-x49r-j8p2",
  "modified": "2025-12-30T15:30:33Z",
  "published": "2025-12-30T15:30:33Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-54250"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/39f5b4b313b445c980a2a295bed28228c29228ed"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a2f6ded41bec1d3be643c80a5eb97f1680309001"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e7067a446264a7514fa1cfaa4052cdb6803bc6a2"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f02edb9debbd36f44efa7567031485892c7df60d"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2023-54250 (GCVE-0-2023-54250)

Vulnerability from cvelistv5 – Published: 2025-12-30 12:15 – Updated: 2025-12-30 12:15

Title

ksmbd: avoid out of bounds access in decode_preauth_ctxt()

Summary

In the Linux kernel, the following vulnerability has been resolved: ksmbd: avoid out of bounds access in decode_preauth_ctxt() Confirm that the accessed pneg_ctxt->HashAlgorithms address sits within the SMB request boundary; deassemble_neg_contexts() only checks that the eight byte smb2_neg_context header + (client controlled) DataLength are within the packet boundary, which is insufficient. Checking for sizeof(struct smb2_preauth_neg_context) is overkill given that the type currently assumes SMB311_SALT_SIZE bytes of trailing Salt.

Severity ?

No CVSS data available.

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/39f5b4b313b445c98…
	https://git.kernel.org/stable/c/a2f6ded41bec1d3be…
	https://git.kernel.org/stable/c/f02edb9debbd36f44…
	https://git.kernel.org/stable/c/e7067a446264a7514…

Impacted products

Vendor

Product

Version

Linux

Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 39f5b4b313b445c980a2a295bed28228c29228ed (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < a2f6ded41bec1d3be643c80a5eb97f1680309001 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < f02edb9debbd36f44efa7567031485892c7df60d (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < e7067a446264a7514fa1cfaa4052cdb6803bc6a2 (git)

Linux

Unaffected: 5.15.145 , ≤ 5.15.* (semver)
Unaffected: 6.1.25 , ≤ 6.1.* (semver)
Unaffected: 6.2.12 , ≤ 6.2.* (semver)
Unaffected: 6.3 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/ksmbd/smb2pdu.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "39f5b4b313b445c980a2a295bed28228c29228ed",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "a2f6ded41bec1d3be643c80a5eb97f1680309001",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "f02edb9debbd36f44efa7567031485892c7df60d",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "e7067a446264a7514fa1cfaa4052cdb6803bc6a2",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "fs/ksmbd/smb2pdu.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.145",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.25",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.2.*",
              "status": "unaffected",
              "version": "6.2.12",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.3",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.145",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.25",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.2.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.3",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nksmbd: avoid out of bounds access in decode_preauth_ctxt()\n\nConfirm that the accessed pneg_ctxt-\u003eHashAlgorithms address sits within\nthe SMB request boundary; deassemble_neg_contexts() only checks that the\neight byte smb2_neg_context header + (client controlled) DataLength are\nwithin the packet boundary, which is insufficient.\n\nChecking for sizeof(struct smb2_preauth_neg_context) is overkill given\nthat the type currently assumes SMB311_SALT_SIZE bytes of trailing Salt."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-12-30T12:15:47.467Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/39f5b4b313b445c980a2a295bed28228c29228ed"
        },
        {
          "url": "https://git.kernel.org/stable/c/a2f6ded41bec1d3be643c80a5eb97f1680309001"
        },
        {
          "url": "https://git.kernel.org/stable/c/f02edb9debbd36f44efa7567031485892c7df60d"
        },
        {
          "url": "https://git.kernel.org/stable/c/e7067a446264a7514fa1cfaa4052cdb6803bc6a2"
        }
      ],
      "title": "ksmbd: avoid out of bounds access in decode_preauth_ctxt()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2023-54250",
    "datePublished": "2025-12-30T12:15:47.467Z",
    "dateReserved": "2025-12-30T12:06:44.514Z",
    "dateUpdated": "2025-12-30T12:15:47.467Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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-F39W-X49R-J8P2

CVE-2023-54250 (GCVE-0-2023-54250)

Tags

Sightings

Nomenclature