{
  "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-2026-63818",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-63818",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-07-19T12:02:17.022Z",
    "updatedAt": "2026-08-17T04:51:25.680Z",
    "importedAt": "2026-10-24T01:58:20.586Z",
    "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": "f2fs: validate orphan inode entry count",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nf2fs: validate orphan inode entry count\n\nf2fs_recover_orphan_inodes() trusts the orphan block entry_count when\nreplaying orphan inodes from the checkpoint pack. A corrupted entry_count\nlarger than F2FS_ORPHANS_PER_BLOCK makes the recovery loop read past the\nino[] array and interpret footer or following data as inode numbers.\n\nOn a crafted image, mounting an unpatched kernel can drive orphan recovery\ninto f2fs_bug_on() and panic the kernel. Validate entry_count before\nconsuming entries so corrupted checkpoint data fails the mount with\n-EFSCORRUPTED and requests fsck instead.\n\nSet ERROR_INCONSISTENT_ORPHAN as well, so the corruption reason can be\nrecorded in the superblock s_errors[] field. This gives fsck a persistent\nhint even though mount-time orphan recovery failure may leave no chance to\npersist SBI_NEED_FSCK through a checkpoint.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "127e670abfa7fa150f6550d620ded930f5bdb4e7",
              "status": "affected",
              "versionType": "git",
              "lessThan": "210c210c92d78fdf5051bc55c5c69044b1a2150a"
            },
            {
              "version": "127e670abfa7fa150f6550d620ded930f5bdb4e7",
              "status": "affected",
              "versionType": "git",
              "lessThan": "ad101d15716f5a24d1fa82a849f80430c805a3dd"
            },
            {
              "version": "127e670abfa7fa150f6550d620ded930f5bdb4e7",
              "status": "affected",
              "versionType": "git",
              "lessThan": "d18c81f5d0ecd5796aa47d66d98f2dd54d8d0f70"
            },
            {
              "version": "127e670abfa7fa150f6550d620ded930f5bdb4e7",
              "status": "affected",
              "versionType": "git",
              "lessThan": "d2f236196d542ccd8505736e41c3a1d3f0305f6f"
            },
            {
              "version": "127e670abfa7fa150f6550d620ded930f5bdb4e7",
              "status": "affected",
              "versionType": "git",
              "lessThan": "550511a2470f6d204fa07b331f048bd2d3c51280"
            },
            {
              "version": "127e670abfa7fa150f6550d620ded930f5bdb4e7",
              "status": "affected",
              "versionType": "git",
              "lessThan": "8aad54746c251f2c2370118df766c0c82e2d2091"
            },
            {
              "version": "127e670abfa7fa150f6550d620ded930f5bdb4e7",
              "status": "affected",
              "versionType": "git",
              "lessThan": "2e12381d4495dc8b0ff042c6856022b2e359835c"
            },
            {
              "version": "127e670abfa7fa150f6550d620ded930f5bdb4e7",
              "status": "affected",
              "versionType": "git",
              "lessThan": "846c499a65816d13f1186e3090e825e8bb8bcb8b"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "3.8",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "3.8"
            },
            {
              "version": "5.10.261",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "version": "5.15.212",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "version": "6.1.178",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "version": "6.6.145",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "version": "6.12.96",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "version": "6.18.38",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "version": "7.1.3",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "7.1.*"
            },
            {
              "version": "7.2",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}