{
  "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-2023-54021",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2023-54021",
    "idYear": 2023,
    "status": "PUBLISHED",
    "publishedAt": "2025-12-24T10:55:51.373Z",
    "updatedAt": "2026-05-11T19:53:45.739Z",
    "importedAt": "2026-10-24T01:57:03.413Z",
    "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": "ext4: set goal start correctly in ext4_mb_normalize_request",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\next4: set goal start correctly in ext4_mb_normalize_request\n\nWe need to set ac_g_ex to notify the goal start used in\next4_mb_find_by_goal. Set ac_g_ex instead of ac_f_ex in\next4_mb_normalize_request.\nBesides we should assure goal start is in range [first_data_block,\nblocks_count) as ext4_mb_initialize_context does.\n\n[ Added a check to make sure size is less than ar->pright; otherwise\n  we could end up passing an underflowed value of ar->pright - size to\n  ext4_get_group_no_and_offset(), which will trigger a BUG_ON later on.\n  - TYT ]",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "c9de560ded61faa5b754137b7753da252391c55a",
              "status": "affected",
              "versionType": "git",
              "lessThan": "2479bb6cbdb4d56b807bbe5229e3e26a6f1f4530"
            },
            {
              "version": "c9de560ded61faa5b754137b7753da252391c55a",
              "status": "affected",
              "versionType": "git",
              "lessThan": "390eee955d4de4662db5e3e9e9a9eae020432cb7"
            },
            {
              "version": "c9de560ded61faa5b754137b7753da252391c55a",
              "status": "affected",
              "versionType": "git",
              "lessThan": "cee78217a7ae72d11c2e21e1a5263b8044489823"
            },
            {
              "version": "c9de560ded61faa5b754137b7753da252391c55a",
              "status": "affected",
              "versionType": "git",
              "lessThan": "3ca3005b502ca8ea87d6a344323b179b48c4e4a3"
            },
            {
              "version": "c9de560ded61faa5b754137b7753da252391c55a",
              "status": "affected",
              "versionType": "git",
              "lessThan": "bc4a3e1d07a86ae5845321d371190244acacb2f2"
            },
            {
              "version": "c9de560ded61faa5b754137b7753da252391c55a",
              "status": "affected",
              "versionType": "git",
              "lessThan": "c6bee8970075b256fc1b07bf4873049219380818"
            },
            {
              "version": "c9de560ded61faa5b754137b7753da252391c55a",
              "status": "affected",
              "versionType": "git",
              "lessThan": "abb330ffaa3a0ae7ce632e28c9260b461c01f19f"
            },
            {
              "version": "c9de560ded61faa5b754137b7753da252391c55a",
              "status": "affected",
              "versionType": "git",
              "lessThan": "b07ffe6927c75d99af534d685282ea188d9f71a6"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "2.6.25",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "2.6.25"
            },
            {
              "version": "4.14.316",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "4.14.*"
            },
            {
              "version": "4.19.284",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "4.19.*"
            },
            {
              "version": "5.4.244",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.4.*"
            },
            {
              "version": "5.10.181",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "version": "5.15.113",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "version": "6.1.30",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "version": "6.3.4",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.3.*"
            },
            {
              "version": "6.4",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}