Vulnerability-Lookup

GHSA-FHPH-RCWP-75HP

Vulnerability from github – Published: 2026-07-25 12:31 – Updated: 2026-07-25 12:31

Details

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

smb: client: mask server-provided mode to 07777 in modefromsid

When modefromsid is active, parse_dacl() applies the server-provided sub_auth[2] value from the NFS mode SID to cf_mode without masking to 07777. Apply the correct masking, same as in the read path.

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-64379"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-07-25T10:17:21Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: mask server-provided mode to 07777 in modefromsid\n\nWhen modefromsid is active, parse_dacl() applies the server-provided\nsub_auth[2] value from the NFS mode SID to cf_mode without masking to\n07777. Apply the correct masking, same as in the read path.",
  "id": "GHSA-fhph-rcwp-75hp",
  "modified": "2026-07-25T12:31:33Z",
  "published": "2026-07-25T12:31:33Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-64379"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/08c600b7e1818539ba5efee4cdb06215c245ca78"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5f6f2241034f189c69d4d0b5f8fe24a0c25b0c14"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b84e002e0df26bbc6cbd3ca01b8212601fe0ae7d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c6c484a7d5bff6b929a86d7ed5130f29834c6a0d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e3d9c7160d483fc8f9e225aafad8ecbbc43f3151"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ee2216dbdf0c677e89bb43e03247dba590ed00ef"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f511807feee7cb29b61bdfa86472c7e9e2e5df94"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f80add1bfb3425100a325b14f19648e75669a954"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-64379 (GCVE-0-2026-64379)

Vulnerability from cvelistv5 – Published: 2026-07-25 08:50 – Updated: 2026-07-25 08:50

Title

smb: client: mask server-provided mode to 07777 in modefromsid

Summary

In the Linux kernel, the following vulnerability has been resolved: smb: client: mask server-provided mode to 07777 in modefromsid When modefromsid is active, parse_dacl() applies the server-provided sub_auth[2] value from the NFS mode SID to cf_mode without masking to 07777. Apply the correct masking, same as in the read path.

Severity

No CVSS data available.

Assigner

Linux

References

8 references

URL	Tags
https://git.kernel.org/stable/c/5f6f2241034f189c6…
https://git.kernel.org/stable/c/ee2216dbdf0c677e8…
https://git.kernel.org/stable/c/f511807feee7cb29b…
https://git.kernel.org/stable/c/08c600b7e1818539b…
https://git.kernel.org/stable/c/b84e002e0df26bbc6…
https://git.kernel.org/stable/c/c6c484a7d5bff6b92…
https://git.kernel.org/stable/c/f80add1bfb3425100…
https://git.kernel.org/stable/c/e3d9c7160d483fc8f…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: e2f8fbfb8d09c06decde162090fac3ee220aa280 , < 5f6f2241034f189c69d4d0b5f8fe24a0c25b0c14 (git) Affected: e2f8fbfb8d09c06decde162090fac3ee220aa280 , < ee2216dbdf0c677e89bb43e03247dba590ed00ef (git) Affected: e2f8fbfb8d09c06decde162090fac3ee220aa280 , < f511807feee7cb29b61bdfa86472c7e9e2e5df94 (git) Affected: e2f8fbfb8d09c06decde162090fac3ee220aa280 , < 08c600b7e1818539ba5efee4cdb06215c245ca78 (git) Affected: e2f8fbfb8d09c06decde162090fac3ee220aa280 , < b84e002e0df26bbc6cbd3ca01b8212601fe0ae7d (git) Affected: e2f8fbfb8d09c06decde162090fac3ee220aa280 , < c6c484a7d5bff6b929a86d7ed5130f29834c6a0d (git) Affected: e2f8fbfb8d09c06decde162090fac3ee220aa280 , < f80add1bfb3425100a325b14f19648e75669a954 (git) Affected: e2f8fbfb8d09c06decde162090fac3ee220aa280 , < e3d9c7160d483fc8f9e225aafad8ecbbc43f3151 (git)
Linux	Linux	Affected: 5.4 Unaffected: 0 , < 5.4 (semver) Unaffected: 5.10.261 , ≤ 5.10.* (semver) Unaffected: 5.15.212 , ≤ 5.15.* (semver) Unaffected: 6.1.178 , ≤ 6.1.* (semver) Unaffected: 6.6.145 , ≤ 6.6.* (semver) Unaffected: 6.12.96 , ≤ 6.12.* (semver) Unaffected: 6.18.39 , ≤ 6.18.* (semver) Unaffected: 7.1.4 , ≤ 7.1.* (semver) Unaffected: 7.2-rc3 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/smb/client/cifsacl.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "5f6f2241034f189c69d4d0b5f8fe24a0c25b0c14",
              "status": "affected",
              "version": "e2f8fbfb8d09c06decde162090fac3ee220aa280",
              "versionType": "git"
            },
            {
              "lessThan": "ee2216dbdf0c677e89bb43e03247dba590ed00ef",
              "status": "affected",
              "version": "e2f8fbfb8d09c06decde162090fac3ee220aa280",
              "versionType": "git"
            },
            {
              "lessThan": "f511807feee7cb29b61bdfa86472c7e9e2e5df94",
              "status": "affected",
              "version": "e2f8fbfb8d09c06decde162090fac3ee220aa280",
              "versionType": "git"
            },
            {
              "lessThan": "08c600b7e1818539ba5efee4cdb06215c245ca78",
              "status": "affected",
              "version": "e2f8fbfb8d09c06decde162090fac3ee220aa280",
              "versionType": "git"
            },
            {
              "lessThan": "b84e002e0df26bbc6cbd3ca01b8212601fe0ae7d",
              "status": "affected",
              "version": "e2f8fbfb8d09c06decde162090fac3ee220aa280",
              "versionType": "git"
            },
            {
              "lessThan": "c6c484a7d5bff6b929a86d7ed5130f29834c6a0d",
              "status": "affected",
              "version": "e2f8fbfb8d09c06decde162090fac3ee220aa280",
              "versionType": "git"
            },
            {
              "lessThan": "f80add1bfb3425100a325b14f19648e75669a954",
              "status": "affected",
              "version": "e2f8fbfb8d09c06decde162090fac3ee220aa280",
              "versionType": "git"
            },
            {
              "lessThan": "e3d9c7160d483fc8f9e225aafad8ecbbc43f3151",
              "status": "affected",
              "version": "e2f8fbfb8d09c06decde162090fac3ee220aa280",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "fs/smb/client/cifsacl.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.4"
            },
            {
              "lessThan": "5.4",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.261",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.212",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.178",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.145",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.96",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.39",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.4",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2-rc3",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.261",
                  "versionStartIncluding": "5.4",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.212",
                  "versionStartIncluding": "5.4",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.178",
                  "versionStartIncluding": "5.4",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.145",
                  "versionStartIncluding": "5.4",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.96",
                  "versionStartIncluding": "5.4",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.39",
                  "versionStartIncluding": "5.4",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1.4",
                  "versionStartIncluding": "5.4",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2-rc3",
                  "versionStartIncluding": "5.4",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: mask server-provided mode to 07777 in modefromsid\n\nWhen modefromsid is active, parse_dacl() applies the server-provided\nsub_auth[2] value from the NFS mode SID to cf_mode without masking to\n07777. Apply the correct masking, same as in the read path."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-07-25T08:50:29.717Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/5f6f2241034f189c69d4d0b5f8fe24a0c25b0c14"
        },
        {
          "url": "https://git.kernel.org/stable/c/ee2216dbdf0c677e89bb43e03247dba590ed00ef"
        },
        {
          "url": "https://git.kernel.org/stable/c/f511807feee7cb29b61bdfa86472c7e9e2e5df94"
        },
        {
          "url": "https://git.kernel.org/stable/c/08c600b7e1818539ba5efee4cdb06215c245ca78"
        },
        {
          "url": "https://git.kernel.org/stable/c/b84e002e0df26bbc6cbd3ca01b8212601fe0ae7d"
        },
        {
          "url": "https://git.kernel.org/stable/c/c6c484a7d5bff6b929a86d7ed5130f29834c6a0d"
        },
        {
          "url": "https://git.kernel.org/stable/c/f80add1bfb3425100a325b14f19648e75669a954"
        },
        {
          "url": "https://git.kernel.org/stable/c/e3d9c7160d483fc8f9e225aafad8ecbbc43f3151"
        }
      ],
      "title": "smb: client: mask server-provided mode to 07777 in modefromsid",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-64379",
    "datePublished": "2026-07-25T08:50:29.717Z",
    "dateReserved": "2026-07-19T15:36:31.784Z",
    "dateUpdated": "2026-07-25T08:50:29.717Z",
    "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.

Detection rules are retrieved from Rulezet.

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.

Action not permitted

GHSA-FHPH-RCWP-75HP

CVE-2026-64379 (GCVE-0-2026-64379)

Tags

Sightings

Nomenclature