{
  "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-2026-98923",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-98923",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-10-23T12:03:28.027Z",
    "updatedAt": "2026-10-23T12:05:45.179Z",
    "importedAt": "2026-10-24T01:58:41.756Z",
    "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": "arm64: io: Reject non-user protection in ioremap_prot()",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\narm64: io: Reject non-user protection in ioremap_prot()\n\nMapping a stack-top page via /dev/mem with PROT_NONE and then\nreading that process's /proc/<pid>/cmdline triggers a spurious WARN\nin ioremap_prot() through generic_access_phys():\n\n  WARNING: ./arch/arm64/include/asm/io.h:275 at generic_access_phys\n  Call trace:\n    generic_access_phys+0x1c8/0x228 (P)\n    __access_remote_vm+0x2b4/0x398\n    access_remote_vm+0x14/0x30\n    get_mm_cmdline+0xf8/0x2a0\n    proc_pid_cmdline_read+0x68/0x120\n\ngeneric_access_phys() passes the protection derived from the user PTE\nto ioremap_prot(). On arm64, a PROT_NONE mapping is represented by a\npresent-invalid PTE, so pte_present() still returns true and the\nprotection reaches ioremap_prot().\n\nA PROT_NONE mapping does not have PTE_USER, causing the existing\nWARN_ON_ONCE() in ioremap_prot() to fire even though this is a valid\nuser mapping. Execute-only mappings have the same issue and must not\nbe readable through this path either.\n\nioremap_prot() should therefore reject protection values without\nPTE_USER without warning. This makes the access fail cleanly for\nPROT_NONE and execute-only mappings while retaining the existing\nuser-protection contract.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "64858b76ec67c5fc40fef8ec1841fecb78c1ebde",
              "status": "affected",
              "versionType": "git",
              "lessThan": "fddc90d4af4550af410f52d11bbf6b5f36443838"
            },
            {
              "version": "eeecafce5afffb4da703666ebefbd4d6e2a5abf6",
              "status": "affected",
              "versionType": "git",
              "lessThan": "0b04af3d88bb7fc69b2d92457890608860e42365"
            },
            {
              "version": "3d64dcc0799c2d6921ba027716b7be721eb19fa8",
              "status": "affected",
              "versionType": "git",
              "lessThan": "b17aa4955e3a694c663ebe99626e4c76ca4f7cfb"
            },
            {
              "version": "8f098037139b294050053123ab2bc0f819d08932",
              "status": "affected",
              "versionType": "git",
              "lessThan": "9b583795feb51f8d50203228d001760d1344ef01"
            },
            {
              "version": "8f098037139b294050053123ab2bc0f819d08932",
              "status": "affected",
              "versionType": "git",
              "lessThan": "bb756b11ad63832ebee58caf9e8f9381eaecff9f"
            },
            {
              "version": "d1ad8fe7f72d73e1617bac79f2ec7a3bedf47e2a",
              "status": "affected",
              "versionType": "git"
            },
            {
              "version": "6.6.143",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "6.6.158"
            },
            {
              "version": "6.12.93",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "6.12.112"
            },
            {
              "version": "6.18.17",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "6.18.55"
            },
            {
              "version": "6.19.7",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "6.20"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "7.0",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "7.0"
            },
            {
              "version": "6.6.158",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "version": "6.12.112",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "version": "6.18.55",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "version": "7.2.9",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "7.2.*"
            },
            {
              "version": "7.3",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}