GHSA-RP5J-QFXG-3367

Vulnerability from github – Published: 2025-08-19 18:31 – Updated: 2026-01-07 18:30
VLAI
Details

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

powercap: dtpm_cpu: Fix NULL pointer dereference in get_pd_power_uw()

The get_pd_power_uw() function can crash with a NULL pointer dereference when em_cpu_get() returns NULL. This occurs when a CPU becomes impossible during runtime, causing get_cpu_device() to return NULL, which propagates through em_cpu_get() and leads to a crash when em_span_cpus() dereferences the NULL pointer.

Add a NULL check after em_cpu_get() and return 0 if unavailable, matching the existing fallback behavior in __dtpm_cpu_setup().

[ rjw: Drop an excess empty code line ]

Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
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{
  "affected": [],
  "aliases": [
    "CVE-2025-38610"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-476"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-08-19T17:15:39Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\npowercap: dtpm_cpu: Fix NULL pointer dereference in get_pd_power_uw()\n\nThe get_pd_power_uw() function can crash with a NULL pointer dereference\nwhen em_cpu_get() returns NULL. This occurs when a CPU becomes impossible\nduring runtime, causing get_cpu_device() to return NULL, which propagates\nthrough em_cpu_get() and leads to a crash when em_span_cpus() dereferences\nthe NULL pointer.\n\nAdd a NULL check after em_cpu_get() and return 0 if unavailable,\nmatching the existing fallback behavior in __dtpm_cpu_setup().\n\n[ rjw: Drop an excess empty code line ]",
  "id": "GHSA-rp5j-qfxg-3367",
  "modified": "2026-01-07T18:30:19Z",
  "published": "2025-08-19T18:31:33Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-38610"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/27914f2b795e2b58e9506f281dcdd98fef09d3c2"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/27e0318f0ea69fcfa32228847debc384ade14578"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2fd001a0075ac01dc64a28a8e21226b3d989a91d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/46dc57406887dd02565cb264224194a6776d882b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8374ac7d69a57d737e701a851ffe980a0d27d3ad"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c6ec27091cf5ac05094c1fe3a6ce914cf711a37c"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00008.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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