GHSA-XG2M-HPW9-R98W

Vulnerability from github – Published: 2025-05-09 09:33 – Updated: 2025-11-17 15:30
VLAI
Details

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

pwm: mediatek: Prevent divide-by-zero in pwm_mediatek_config()

With CONFIG_COMPILE_TEST && !CONFIG_HAVE_CLK, pwm_mediatek_config() has a divide-by-zero in the following line:

do_div(resolution, clk_get_rate(pc->clk_pwms[pwm->hwpwm]));

due to the fact that the !CONFIG_HAVE_CLK version of clk_get_rate() returns zero.

This is presumably just a theoretical problem: COMPILE_TEST overrides the dependency on RALINK which would select COMMON_CLK. Regardless it's a good idea to check for the error explicitly to avoid divide-by-zero.

Fixes the following warning:

drivers/pwm/pwm-mediatek.o: warning: objtool: .text: unexpected end of section

[ukleinek: s/CONFIG_CLK/CONFIG_HAVE_CLK/]

Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Show details on source website
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{
  "affected": [],
  "aliases": [
    "CVE-2025-37850"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-369"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-05-09T07:16:05Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\npwm: mediatek: Prevent divide-by-zero in pwm_mediatek_config()\n\nWith CONFIG_COMPILE_TEST \u0026\u0026 !CONFIG_HAVE_CLK, pwm_mediatek_config() has a\ndivide-by-zero in the following line:\n\n\tdo_div(resolution, clk_get_rate(pc-\u003eclk_pwms[pwm-\u003ehwpwm]));\n\ndue to the fact that the !CONFIG_HAVE_CLK version of clk_get_rate()\nreturns zero.\n\nThis is presumably just a theoretical problem: COMPILE_TEST overrides\nthe dependency on RALINK which would select COMMON_CLK.  Regardless it\u0027s\na good idea to check for the error explicitly to avoid divide-by-zero.\n\nFixes the following warning:\n\n  drivers/pwm/pwm-mediatek.o: warning: objtool: .text: unexpected end of section\n\n[ukleinek: s/CONFIG_CLK/CONFIG_HAVE_CLK/]",
  "id": "GHSA-xg2m-hpw9-r98w",
  "modified": "2025-11-17T15:30:31Z",
  "published": "2025-05-09T09:33:19Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-37850"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4cb15042b5f3ec0474e91cf379120cc597625dbb"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/77fb96dbe350e8a5ae4965ff9f6e7049f3966a6b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7ca59947b5fcf94e7ea4029d1bd0f7c41500a161"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8b9f60725d74b72c238e4437c957d0217746b506"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8ddbec73ea2598d8414e8f7103241b55cf877010"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c343856ff2689ce0afef823592732fc178ef4aac"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e1206d8e1651c9f62e5640b69b14d925b1a0a00a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e3cf0c38d3ce754ad63005102fcfeb0b7ff3290b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f3e9cf266c2c103cf071e15d7a17e2c699fff3c5"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html"
    }
  ],
  "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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