ghsa-92f2-89hh-wf7v
Vulnerability from github
Published
2025-11-12 12:30
Modified
2025-11-12 12:30
Details

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.

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{
  "affected": [],
  "aliases": [
    "CVE-2025-40112"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-11-12T11:15:40Z",
    "severity": null
  },
  "details": "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.",
  "id": "GHSA-92f2-89hh-wf7v",
  "modified": "2025-11-12T12:30:26Z",
  "published": "2025-11-12T12:30:26Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-40112"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/05440320ea3e249d5f984918f2bf51210c1a7c03"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/088c5098ec6d6b0396edfbf3dad3e81de8469c1c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0b67c8fc10b13a9090340c5f8a37d308f4e1571c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/37547d8e6eba87507279ee3dfddfd9dc46335454"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7823fc4d8ab5e57f8db7806ff2530c03c166c4bb"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8cdeb5e482d3fdce7e825444b6ca3865e24c0228"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a365ee556e45f780ee322b349a06efdad0c1458f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a90ce516a73dbe087f9bf3dbf311301a58d125c6"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}


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