{
  "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-2024-40974",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2024-40974",
    "idYear": 2024,
    "status": "PUBLISHED",
    "publishedAt": "2024-07-12T12:32:11.417Z",
    "updatedAt": "2026-08-05T11:34:20.623Z",
    "importedAt": "2026-10-24T01:57:16.009Z",
    "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": "powerpc/pseries: Enforce hcall result buffer validity and size",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\npowerpc/pseries: Enforce hcall result buffer validity and size\n\nplpar_hcall(), plpar_hcall9(), and related functions expect callers to\nprovide valid result buffers of certain minimum size. Currently this\nis communicated only through comments in the code and the compiler has\nno idea.\n\nFor example, if I write a bug like this:\n\n  long retbuf[PLPAR_HCALL_BUFSIZE]; // should be PLPAR_HCALL9_BUFSIZE\n  plpar_hcall9(H_ALLOCATE_VAS_WINDOW, retbuf, ...);\n\nThis compiles with no diagnostics emitted, but likely results in stack\ncorruption at runtime when plpar_hcall9() stores results past the end\nof the array. (To be clear this is a contrived example and I have not\nfound a real instance yet.)\n\nTo make this class of error less likely, we can use explicitly-sized\narray parameters instead of pointers in the declarations for the hcall\nAPIs. When compiled with -Warray-bounds[1], the code above now\nprovokes a diagnostic like this:\n\nerror: array argument is too small;\nis of size 32, callee requires at least 72 [-Werror,-Warray-bounds]\n   60 |                 plpar_hcall9(H_ALLOCATE_VAS_WINDOW, retbuf,\n      |                 ^                                   ~~~~~~\n\n[1] Enabled for LLVM builds but not GCC for now. See commit\n    0da6e5fd6c37 (\"gcc: disable '-Warray-bounds' for gcc-13 too\") and\n    related changes.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "b9377ffc3a03cde558d76349a262a1adbb6d3112",
              "status": "affected",
              "versionType": "git",
              "lessThan": "acf2b80c31c37acab040baa3cf5f19fbd5140b18"
            },
            {
              "version": "b9377ffc3a03cde558d76349a262a1adbb6d3112",
              "status": "affected",
              "versionType": "git",
              "lessThan": "19c166ee42cf16d8b156a6cb4544122d9a65d3ca"
            },
            {
              "version": "b9377ffc3a03cde558d76349a262a1adbb6d3112",
              "status": "affected",
              "versionType": "git",
              "lessThan": "a8c988d752b3d98d5cc1e3929c519a55ef55426c"
            },
            {
              "version": "b9377ffc3a03cde558d76349a262a1adbb6d3112",
              "status": "affected",
              "versionType": "git",
              "lessThan": "262e942ff5a839b9e4f3302a8987928b0c8b8a2d"
            },
            {
              "version": "b9377ffc3a03cde558d76349a262a1adbb6d3112",
              "status": "affected",
              "versionType": "git",
              "lessThan": "8aa11aa001576bf3b00dcb8559564ad7a3113588"
            },
            {
              "version": "b9377ffc3a03cde558d76349a262a1adbb6d3112",
              "status": "affected",
              "versionType": "git",
              "lessThan": "3ad0034910a57aa88ed9976b1431b7b8c84e0048"
            },
            {
              "version": "b9377ffc3a03cde558d76349a262a1adbb6d3112",
              "status": "affected",
              "versionType": "git",
              "lessThan": "aa6107dcc4ce9a3451f2d729204713783b657257"
            },
            {
              "version": "b9377ffc3a03cde558d76349a262a1adbb6d3112",
              "status": "affected",
              "versionType": "git",
              "lessThan": "ff2e185cf73df480ec69675936c4ee75a445c3e4"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "2.6.19",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "2.6.19"
            },
            {
              "version": "4.19.317",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "4.19.*"
            },
            {
              "version": "5.4.279",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.4.*"
            },
            {
              "version": "5.10.221",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "version": "5.15.162",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "version": "6.1.96",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "version": "6.6.36",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "version": "6.9.7",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.9.*"
            },
            {
              "version": "6.10",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}