CVE-2025-40126 (GCVE-0-2025-40126)
Vulnerability from cvelistv5
Published
2025-11-12 10:23
Modified
2025-11-12 10:23
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: sparc: fix accurate exception reporting in copy_{from_to}_user for UltraSPARC The referenced commit introduced exception handlers on user-space memory references in copy_from_user and copy_to_user. These handlers return from the respective function and calculate the remaining bytes left to copy using the current register contents. This commit fixes a couple of bad calculations. This will fix the return value of copy_from_user and copy_to_user in the faulting case. The behaviour of memcpy stays unchanged.
References
Impacted products
Vendor Product Version
Linux Linux Version: cb736fdbb208eb3420f1a2eb2bfc024a6e9dcada
Version: cb736fdbb208eb3420f1a2eb2bfc024a6e9dcada
Version: cb736fdbb208eb3420f1a2eb2bfc024a6e9dcada
Version: cb736fdbb208eb3420f1a2eb2bfc024a6e9dcada
Version: cb736fdbb208eb3420f1a2eb2bfc024a6e9dcada
Version: cb736fdbb208eb3420f1a2eb2bfc024a6e9dcada
Version: cb736fdbb208eb3420f1a2eb2bfc024a6e9dcada
Version: cb736fdbb208eb3420f1a2eb2bfc024a6e9dcada
Version: 1731d90d8a558ecb20cdee0c2c001ae8e15c251d
Version: b0580eadc19ff3a617a7d07cfaf2a985153c114e
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{
  "containers": {
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        {
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          "product": "Linux",
          "programFiles": [
            "arch/sparc/lib/U1memcpy.S"
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          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "version": "4.9"
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              "version": "0",
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              "status": "unaffected",
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              "status": "unaffected",
              "version": "5.10.246",
              "versionType": "semver"
            },
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              "status": "unaffected",
              "version": "5.15.195",
              "versionType": "semver"
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              "status": "unaffected",
              "version": "6.1.156",
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              "status": "unaffected",
              "version": "6.6.112",
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              "status": "unaffected",
              "version": "6.12.53",
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              "lessThanOrEqual": "6.17.*",
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              "version": "6.17.3",
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              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.18-rc1",
              "versionType": "original_commit_for_fix"
            }
          ]
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      ],
      "cpeApplicability": [
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              "operator": "OR"
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsparc: fix accurate exception reporting in copy_{from_to}_user for UltraSPARC\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. This commit fixes a couple of bad\ncalculations. This will fix the return value of copy_from_user and\ncopy_to_user in the faulting case. The behaviour of memcpy stays unchanged."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-11-12T10:23:20.460Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/0bf3dc3a2156f1c5ddaba4b85d09767874634114"
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          "url": "https://git.kernel.org/stable/c/41c18baee66134e6ef786eb075c1b6adb22432b0"
        },
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          "url": "https://git.kernel.org/stable/c/59424dc0d0e044b2eb007686a4724ddd91d57db5"
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        },
        {
          "url": "https://git.kernel.org/stable/c/4fba1713001195e59cfc001ff1f2837dab877efb"
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-40126",
    "datePublished": "2025-11-12T10:23:20.460Z",
    "dateReserved": "2025-04-16T07:20:57.169Z",
    "dateUpdated": "2025-11-12T10:23:20.460Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
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  }
}


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