fkie_cve-2023-53310
Vulnerability from fkie_nvd
Published
2025-09-16 17:15
Modified
2025-09-17 14:18
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: power: supply: axp288_fuel_gauge: Fix external_power_changed race fuel_gauge_external_power_changed() dereferences info->bat, which gets sets in axp288_fuel_gauge_probe() like this: info->bat = devm_power_supply_register(dev, &fuel_gauge_desc, &psy_cfg); As soon as devm_power_supply_register() has called device_add() the external_power_changed callback can get called. So there is a window where fuel_gauge_external_power_changed() may get called while info->bat has not been set yet leading to a NULL pointer dereference. Fixing this is easy. The external_power_changed callback gets passed the power_supply which will eventually get stored in info->bat, so fuel_gauge_external_power_changed() can simply directly use the passed in psy argument which is always valid.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/0456b912121e45b3ef54abe3135e5dcb541f956c
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a636c6ba9ce898207f283271cb28511206ab739b
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f8319774d6f1567d6e7d03653174ab0c82c5c66d
Impacted products
Vendor Product Version


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{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\npower: supply: axp288_fuel_gauge: Fix external_power_changed race\n\nfuel_gauge_external_power_changed() dereferences info-\u003ebat,\nwhich gets sets in axp288_fuel_gauge_probe() like this:\n\n  info-\u003ebat = devm_power_supply_register(dev, \u0026fuel_gauge_desc, \u0026psy_cfg);\n\nAs soon as devm_power_supply_register() has called device_add()\nthe external_power_changed callback can get called. So there is a window\nwhere fuel_gauge_external_power_changed() may get called while\ninfo-\u003ebat has not been set yet leading to a NULL pointer dereference.\n\nFixing this is easy. The external_power_changed callback gets passed\nthe power_supply which will eventually get stored in info-\u003ebat,\nso fuel_gauge_external_power_changed() can simply directly use\nthe passed in psy argument which is always valid."
    }
  ],
  "id": "CVE-2023-53310",
  "lastModified": "2025-09-17T14:18:55.093",
  "metrics": {},
  "published": "2025-09-16T17:15:36.847",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/0456b912121e45b3ef54abe3135e5dcb541f956c"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/a636c6ba9ce898207f283271cb28511206ab739b"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/f8319774d6f1567d6e7d03653174ab0c82c5c66d"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Awaiting Analysis"
}


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