{
  "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-2026-46124",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-46124",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-05-28T09:35:38.887Z",
    "updatedAt": "2026-10-19T19:36:51.382Z",
    "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": "isofs: validate block number from NFS file handle in isofs_export_iget",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nisofs: validate block number from NFS file handle in isofs_export_iget\n\nisofs_fh_to_dentry() and isofs_fh_to_parent() pass an attacker-\ncontrolled block number (ifid->block or ifid->parent_block) from\nthe NFS file handle to isofs_export_iget(), which only rejects\nblock == 0 before calling isofs_iget() and ultimately sb_bread().\nA crafted file handle with fh_len sufficient to pass the check\nadded by commit 0405d4b63d08 (\"isofs: Prevent the use of too small\nfid\") can still drive the server to read any in-range block on the\nbacking device as if it were an iso_directory_record.  That earlier\nfix was assigned CVE-2025-37780.\n\nsb_bread() on an out-of-range block returns NULL cleanly via the\nEIO path, so there is no memory-safety violation.  For in-range\nreads of adjacent-partition data on the same block device, the\nunrelated bytes end up in iso_inode_info fields that reach the NFS\nclient as dentry metadata.  The deployment surface (isofs exported\nover NFS from loop-mounted images) is narrow and requires an\nauthenticated NFS peer, but the malformed-file-handle class is\nreportable as hardening next to the existing CVE-2025-37780 fix.\n\nReject block >= ISOFS_SB(sb)->s_nzones in isofs_export_iget() so\nthe check covers both isofs_fh_to_dentry() and isofs_fh_to_parent()\ncall sites with a single line.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "5e7de55602c61c8ff28db075cc49c8dd6989d7e0",
              "status": "affected",
              "versionType": "git",
              "lessThan": "ee0024f5a7e3c73aa253869fae9650ae054093ca"
            },
            {
              "version": "63d5a3e207bf315a32c7d16de6c89753a759f95a",
              "status": "affected",
              "versionType": "git",
              "lessThan": "31dbb4ba0f719ae7774e4c0c95172c9bf81692f5"
            },
            {
              "version": "0fdafdaef796816a9ed0fd7ac812932d569d9beb",
              "status": "affected",
              "versionType": "git",
              "lessThan": "908a76f0b1038035e6ebb4f2293ce079f92e0a02"
            },
            {
              "version": "952e7a7e317f126d0a2b879fc531b716932d5ffa",
              "status": "affected",
              "versionType": "git",
              "lessThan": "bb0988ed4f2e26d59bbb58f644cb3a55b7521e21"
            },
            {
              "version": "56dfffea9fd3be0b3795a9ca6401e133a8427e0b",
              "status": "affected",
              "versionType": "git",
              "lessThan": "0a1af74ae2177bda3aee0837a0546309aa539d0d"
            },
            {
              "version": "0405d4b63d082861f4eaff9d39c78ee9dc34f845",
              "status": "affected",
              "versionType": "git",
              "lessThan": "afbafeddf23db13fe2edb2d5c0bf4bbb13d7881b"
            },
            {
              "version": "0405d4b63d082861f4eaff9d39c78ee9dc34f845",
              "status": "affected",
              "versionType": "git",
              "lessThan": "4c721a1d9b3c4fcaf59cc9b2281e3ec5a043e1a6"
            },
            {
              "version": "0405d4b63d082861f4eaff9d39c78ee9dc34f845",
              "status": "affected",
              "versionType": "git",
              "lessThan": "24376458138387fb251e782e624c7776e9826796"
            },
            {
              "version": "ee01a309ebf598be1ff8174901ed6e91619f1749",
              "status": "affected",
              "versionType": "git"
            },
            {
              "version": "007124c896e7d4614ac1f6bd4dedb975c35a2a8e",
              "status": "affected",
              "versionType": "git"
            },
            {
              "version": "5.10.237",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "5.10.258"
            },
            {
              "version": "5.15.181",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "5.15.209"
            },
            {
              "version": "6.1.135",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "6.1.175"
            },
            {
              "version": "6.6.88",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "6.6.140"
            },
            {
              "version": "6.12.25",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "6.12.88"
            },
            {
              "version": "5.4.293",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "5.5"
            },
            {
              "version": "6.14.4",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "6.15"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "6.15",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "6.15"
            },
            {
              "version": "5.10.258",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "version": "5.15.209",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "version": "6.1.175",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "version": "6.6.140",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "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": "*"
            }
          ]
        }
      ]
    }
  }
}