{
  "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-2025-40124",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2025-40124",
    "idYear": 2025,
    "status": "PUBLISHED",
    "publishedAt": "2025-11-12T10:23:19.861Z",
    "updatedAt": "2026-08-05T12:07:57.197Z",
    "importedAt": "2026-10-24T01:57:34.152Z",
    "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": "sparc: fix accurate exception reporting in copy_{from_to}_user for UltraSPARC III",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nsparc: fix accurate exception reporting in copy_{from_to}_user for UltraSPARC III\n\nAnthony Yznaga tracked down that a BUG_ON in ext4 code with large folios\nenabled resulted from copy_from_user() returning impossibly large values\ngreater than the size to be copied. This lead to __copy_from_iter()\nreturning impossible values instead of the actual number of bytes it was\nable to copy.\n\nThe BUG_ON has been reported in\nhttps://lore.kernel.org/r/b14f55642207e63e907965e209f6323a0df6dcee.camel@physik.fu-berlin.de\n\nThe referenced commit introduced exception handlers on user-space memory\nreferences in copy_from_user and copy_to_user. These handlers return from\nthe respective function and calculate the remaining bytes left to copy\nusing the current register contents. The exception handlers expect that\n%o2 has already been masked during the bulk copy loop, but the masking was\nperformed after that loop. This will fix the return value of copy_from_user\nand copy_to_user in the faulting case. The behaviour of memcpy stays\nunchanged.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "ee841d0aff649164080e445e84885015958d8ff4",
              "status": "affected",
              "versionType": "git",
              "lessThan": "fdd43fe6d286f27b826572457a89c926f97e2d3a"
            },
            {
              "version": "ee841d0aff649164080e445e84885015958d8ff4",
              "status": "affected",
              "versionType": "git",
              "lessThan": "1198077606aeffb102587c6ea079ce99641c99d4"
            },
            {
              "version": "ee841d0aff649164080e445e84885015958d8ff4",
              "status": "affected",
              "versionType": "git",
              "lessThan": "1857cdca12c4aff58bf26a7005a4d02850c29927"
            },
            {
              "version": "ee841d0aff649164080e445e84885015958d8ff4",
              "status": "affected",
              "versionType": "git",
              "lessThan": "91eda032eb16e5d2be27c95584665bc555bb5a90"
            },
            {
              "version": "ee841d0aff649164080e445e84885015958d8ff4",
              "status": "affected",
              "versionType": "git",
              "lessThan": "dc766c4830a7e1e1ee9d7f77d4ab344f2eb23c8e"
            },
            {
              "version": "ee841d0aff649164080e445e84885015958d8ff4",
              "status": "affected",
              "versionType": "git",
              "lessThan": "5ef9c94d7110e90260c06868cf1dcf899b9f25ee"
            },
            {
              "version": "ee841d0aff649164080e445e84885015958d8ff4",
              "status": "affected",
              "versionType": "git",
              "lessThan": "e50377c6b3f278c9f3ef017ffce17f5fcc9dace4"
            },
            {
              "version": "ee841d0aff649164080e445e84885015958d8ff4",
              "status": "affected",
              "versionType": "git",
              "lessThan": "47b49c06eb62504075f0f2e2227aee2e2c2a58b3"
            },
            {
              "version": "1c7e17b1c4d60cc5aa575460f7efb73686dd3b39",
              "status": "affected",
              "versionType": "git"
            },
            {
              "version": "ac663c54f40b2830b1ca32d1ae9d683fe248b14c",
              "status": "affected",
              "versionType": "git"
            },
            {
              "version": "4.4.34",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "4.5"
            },
            {
              "version": "4.8.10",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "4.9"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "4.9",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "4.9"
            },
            {
              "version": "5.4.301",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.4.*"
            },
            {
              "version": "5.10.246",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "version": "5.15.195",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "version": "6.1.156",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "version": "6.6.112",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "version": "6.12.53",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "version": "6.17.3",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.17.*"
            },
            {
              "version": "6.18",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}