ghsa-m4w7-955p-fwcr
Vulnerability from github
Published
2025-02-27 03:33
Modified
2025-03-07 21:31
Severity ?
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Details

In the Linux kernel, the following vulnerability has been resolved:

rtc: tps6594: Fix integer overflow on 32bit systems

The problem is this multiply in tps6594_rtc_set_offset()

tmp = offset * TICKS_PER_HOUR;

The "tmp" variable is an s64 but "offset" is a long in the (-277774)-277774 range. On 32bit systems a long can hold numbers up to approximately two billion. The number of TICKS_PER_HOUR is really large, (32768 * 3600) or roughly a hundred million. When you start multiplying by a hundred million it doesn't take long to overflow the two billion mark.

Probably the safest way to fix this is to change the type of TICKS_PER_HOUR to long long because it's such a large number.

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{
  "affected": [],
  "aliases": [
    "CVE-2024-57953"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-190"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-02-27T02:15:10Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nrtc: tps6594: Fix integer overflow on 32bit systems\n\nThe problem is this multiply in tps6594_rtc_set_offset()\n\n\ttmp = offset * TICKS_PER_HOUR;\n\nThe \"tmp\" variable is an s64 but \"offset\" is a long in the\n(-277774)-277774 range.  On 32bit systems a long can hold numbers up to\napproximately two billion.  The number of TICKS_PER_HOUR is really large,\n(32768 * 3600) or roughly a hundred million.  When you start multiplying\nby a hundred million it doesn\u0027t take long to overflow the two billion\nmark.\n\nProbably the safest way to fix this is to change the type of\nTICKS_PER_HOUR to long long because it\u0027s such a large number.",
  "id": "GHSA-m4w7-955p-fwcr",
  "modified": "2025-03-07T21:31:04Z",
  "published": "2025-02-27T03:33:58Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-57953"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/09c4a610153286cef54d4f0c85398f4e32fc227e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5127f3cbfc78a7b301b86328247230bec47e0bb3"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/53b0c7b15accb18d15d95c7fe68f61630ebfd1ca"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}


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