{
  "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-2026-23230",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-23230",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-02-18T14:53:34.078Z",
    "updatedAt": "2026-10-19T18:35:39.300Z",
    "importedAt": "2026-10-24T01:58:02.025Z",
    "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: split cached_fid bitfields to avoid shared-byte RMW races",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: split cached_fid bitfields to avoid shared-byte RMW races\n\nis_open, has_lease and on_list are stored in the same bitfield byte in\nstruct cached_fid but are updated in different code paths that may run\nconcurrently. Bitfield assignments generate byte read–modify–write\noperations (e.g. `orb $mask, addr` on x86_64), so updating one flag can\nrestore stale values of the others.\n\nA possible interleaving is:\n    CPU1: load old byte (has_lease=1, on_list=1)\n    CPU2: clear both flags (store 0)\n    CPU1: RMW store (old | IS_OPEN) -> reintroduces cleared bits\n\nTo avoid this class of races, convert these flags to separate bool\nfields.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "ebe98f1447bbccf8228335c62d86af02a0ed23f7",
              "status": "affected",
              "versionType": "git",
              "lessThan": "569fecc56bfe4df66f05734d67daef887746656b"
            },
            {
              "version": "ebe98f1447bbccf8228335c62d86af02a0ed23f7",
              "status": "affected",
              "versionType": "git",
              "lessThan": "4386f6af8aaedd0c5ad6f659b40cadcc8f423828"
            },
            {
              "version": "ebe98f1447bbccf8228335c62d86af02a0ed23f7",
              "status": "affected",
              "versionType": "git",
              "lessThan": "3eaa22d688311c708b73f3c68bc6d0c8e3f0f77a"
            },
            {
              "version": "ebe98f1447bbccf8228335c62d86af02a0ed23f7",
              "status": "affected",
              "versionType": "git",
              "lessThan": "c4b9edd55987384a1f201d3d07ff71e448d79c1b"
            },
            {
              "version": "ebe98f1447bbccf8228335c62d86af02a0ed23f7",
              "status": "affected",
              "versionType": "git",
              "lessThan": "4cfa4c37dcbcfd70866e856200ed8a2894cac578"
            },
            {
              "version": "ebe98f1447bbccf8228335c62d86af02a0ed23f7",
              "status": "affected",
              "versionType": "git",
              "lessThan": "ec306600d5ba7148c9dbf8f5a8f1f5c1a044a241"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "6.1",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "6.1"
            },
            {
              "version": "6.1.164",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "version": "6.6.125",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "version": "6.12.72",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "version": "6.18.11",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "version": "6.19.1",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.19.*"
            },
            {
              "version": "7.0",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}