CVE-2025-40112 (GCVE-0-2025-40112)
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 Niagara 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 and a broken epilogue in the exception handlers. This will prevent crashes and ensure correct return values 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: 7ae3aaf53f1695877ccd5ebbc49ea65991e41f1e
Version: 7ae3aaf53f1695877ccd5ebbc49ea65991e41f1e
Version: 7ae3aaf53f1695877ccd5ebbc49ea65991e41f1e
Version: 7ae3aaf53f1695877ccd5ebbc49ea65991e41f1e
Version: 7ae3aaf53f1695877ccd5ebbc49ea65991e41f1e
Version: 7ae3aaf53f1695877ccd5ebbc49ea65991e41f1e
Version: 7ae3aaf53f1695877ccd5ebbc49ea65991e41f1e
Version: 7ae3aaf53f1695877ccd5ebbc49ea65991e41f1e
Version: bfc8be6593097cb074d3912ba2f27565cfbb7d6e
Version: a15859f9d8396cce7c55ccdb7e75f70f14cbc349
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{
  "containers": {
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        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "arch/sparc/lib/NGmemcpy.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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            },
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              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
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              "status": "unaffected",
              "version": "5.4.301",
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            {
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              "status": "unaffected",
              "version": "5.10.246",
              "versionType": "semver"
            },
            {
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              "status": "unaffected",
              "version": "5.15.195",
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            },
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              "status": "unaffected",
              "version": "6.1.156",
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              "version": "6.6.112",
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              "version": "6.12.53",
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            {
              "lessThanOrEqual": "6.17.*",
              "status": "unaffected",
              "version": "6.17.3",
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            },
            {
              "lessThanOrEqual": "*",
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              "version": "6.18-rc1",
              "versionType": "original_commit_for_fix"
            }
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        }
      ],
      "cpeApplicability": [
        {
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              "negate": false,
              "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 Niagara\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 and a broken epilogue in the exception handlers. This will\nprevent crashes and ensure correct return values of copy_from_user and\ncopy_to_user in the faulting case. The behaviour of memcpy stays unchanged."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-11-12T10:23:16.690Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/05440320ea3e249d5f984918f2bf51210c1a7c03"
        },
        {
          "url": "https://git.kernel.org/stable/c/7823fc4d8ab5e57f8db7806ff2530c03c166c4bb"
        },
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          "url": "https://git.kernel.org/stable/c/37547d8e6eba87507279ee3dfddfd9dc46335454"
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          "url": "https://git.kernel.org/stable/c/a365ee556e45f780ee322b349a06efdad0c1458f"
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          "url": "https://git.kernel.org/stable/c/8cdeb5e482d3fdce7e825444b6ca3865e24c0228"
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        {
          "url": "https://git.kernel.org/stable/c/0b67c8fc10b13a9090340c5f8a37d308f4e1571c"
        }
      ],
      "title": "sparc: fix accurate exception reporting in copy_{from_to}_user for Niagara",
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-40112",
    "datePublished": "2025-11-12T10:23:16.690Z",
    "dateReserved": "2025-04-16T07:20:57.167Z",
    "dateUpdated": "2025-11-12T10:23:16.690Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2025-40112\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-11-12T11:15:40.460\",\"lastModified\":\"2025-11-12T16:19:12.850\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"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 Niagara\\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 and a broken epilogue in the exception handlers. This will\\nprevent crashes and ensure correct return values of copy_from_user and\\ncopy_to_user in the faulting case. The behaviour of memcpy stays unchanged.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/05440320ea3e249d5f984918f2bf51210c1a7c03\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/088c5098ec6d6b0396edfbf3dad3e81de8469c1c\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/0b67c8fc10b13a9090340c5f8a37d308f4e1571c\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/37547d8e6eba87507279ee3dfddfd9dc46335454\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/7823fc4d8ab5e57f8db7806ff2530c03c166c4bb\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/8cdeb5e482d3fdce7e825444b6ca3865e24c0228\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/a365ee556e45f780ee322b349a06efdad0c1458f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/a90ce516a73dbe087f9bf3dbf311301a58d125c6\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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