{
  "schemaVersion": 1,
  "attribution": [
    {
      "source": "CISA Known Exploited Vulnerabilities",
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog",
      "licence": "US government work"
    },
    {
      "source": "GitHub Advisory Database",
      "url": "https://github.com/advisories",
      "licence": "CC BY 4.0"
    },
    {
      "source": "Have I Been Pwned",
      "url": "https://haveibeenpwned.com/",
      "licence": "CC BY 4.0"
    },
    {
      "source": "CVE Program (CVE records)",
      "url": "https://www.cve.org/Legal/TermsOfUse",
      "licence": "CVE Terms of Use",
      "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.",
      "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy."
    },
    {
      "source": "FIRST EPSS",
      "url": "https://www.first.org/epss/",
      "licence": "free to use; FIRST requests attribution"
    }
  ],
  "record": {
    "id": "CVE-2026-46139",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-46139",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-05-28T09:35:55.234Z",
    "updatedAt": "2026-06-14T17:57:22.559Z",
    "importedAt": "2026-10-24T01:58:14.884Z",
    "snapshot": {
      "id": "cve_2026-10-24_midnight_baseline",
      "at": "2026-10-24T00:00:00.000Z",
      "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z"
    },
    "facts": {
      "title": "smb: client: use kzalloc to zero-initialize security descriptor buffer",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: use kzalloc to zero-initialize security descriptor buffer\n\nCommit 62e7dd0a39c2d (\"smb: common: change the data type of num_aces\nto le16\") split struct smb_acl's __le32 num_aces field into __le16\nnum_aces and __le16 reserved. The reserved field corresponds to Sbz2\nin the MS-DTYP ACL wire format, which must be zero [1].\n\nWhen building an ACL descriptor in build_sec_desc(), we are using a\nkmalloc()'ed descriptor buffer and writing the fields explicitly using\nle16() writes now. This never writes to the 2 byte reserved field,\nleaving it as uninitialized heap data.\n\nWhen the reserved field happens to contain non-zero slab garbage,\nSamba rejects the security descriptor with \"ndr_pull_security_descriptor\nfailed: Range Error\", causing chmod to fail with EINVAL.\n\nChange kmalloc() to kzalloc() to ensure the entire buffer is\nzero-initialized.\n\n\n[1] https://learn.microsoft.com/en-us/openspecs/windows_protocols/ms-dtyp/20233ed8-a6c6-4097-aafa-dd545ed24428",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "1593ddb37bd124c131fe635397df68e854a03108",
              "status": "affected",
              "versionType": "git",
              "lessThan": "4c3ed344a970aad51388ac3b0145b98318f0e21f"
            },
            {
              "version": "da087905e3270e2291c0afae39a28e7d183e5ec3",
              "status": "affected",
              "versionType": "git",
              "lessThan": "941a1e6eb35440336913afc88a82103291956d5d"
            },
            {
              "version": "62e7dd0a39c2d0d7ff03274c36df971f1b3d2d0d",
              "status": "affected",
              "versionType": "git",
              "lessThan": "be1ef9512a3f5a755895c24f31b334342f4aa15b"
            },
            {
              "version": "62e7dd0a39c2d0d7ff03274c36df971f1b3d2d0d",
              "status": "affected",
              "versionType": "git",
              "lessThan": "9bdb2ca31368b7671949dfb94a5d57ffccd01edd"
            },
            {
              "version": "62e7dd0a39c2d0d7ff03274c36df971f1b3d2d0d",
              "status": "affected",
              "versionType": "git",
              "lessThan": "5e489c6c47a2ac15edbaca153b9348e42c1eacab"
            },
            {
              "version": "191f2f444745087c3c51fd6042a0e25f42315ab0",
              "status": "affected",
              "versionType": "git"
            },
            {
              "version": "6.12.23",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "6.12.88"
            },
            {
              "version": "6.13.11",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "6.14"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "6.14",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "6.14"
            },
            {
              "version": "6.12.88",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "version": "6.18.30",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "version": "7.0.7",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "7.0.*"
            },
            {
              "version": "7.1",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}