CVE-2026-46292 (GCVE-0-2026-46292)
Vulnerability from cvelistv5
Published
2026-06-08 15:46
Modified
2026-06-19 12:00
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: pmdomain: core: Fix detach procedure for virtual devices in genpd If a device is attached to a PM domain through genpd_dev_pm_attach_by_id(), genpd calls pm_runtime_enable() for the corresponding virtual device that it registers. While this avoids boilerplate code in drivers, there is no corresponding call to pm_runtime_disable() in genpd_dev_pm_detach(). This means these virtual devices are typically detached from its genpd, while runtime PM remains enabled for them, which is not how things are designed to work. In worst cases it may lead to critical errors, like a NULL pointer dereference bug in genpd_runtime_suspend(), which was recently reported. For another case, we may end up keeping an unnecessary vote for a performance state for the device. To fix these problems, let's add this missing call to pm_runtime_disable() in genpd_dev_pm_detach().
References
Impacted products
Vendor Product Version
Linux Linux Version: 3c095f32a92be4d07f3172a777dab1aacdb6a728
Version: 3c095f32a92be4d07f3172a777dab1aacdb6a728
Version: 3c095f32a92be4d07f3172a777dab1aacdb6a728
Version: 3c095f32a92be4d07f3172a777dab1aacdb6a728
Version: 3c095f32a92be4d07f3172a777dab1aacdb6a728
Version: 3c095f32a92be4d07f3172a777dab1aacdb6a728
Version: 3c095f32a92be4d07f3172a777dab1aacdb6a728
Version: 3c095f32a92be4d07f3172a777dab1aacdb6a728
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\npmdomain: core: Fix detach procedure for virtual devices in genpd\n\nIf a device is attached to a PM domain through genpd_dev_pm_attach_by_id(),\ngenpd calls pm_runtime_enable() for the corresponding virtual device that\nit registers. While this avoids boilerplate code in drivers, there is no\ncorresponding call to pm_runtime_disable() in genpd_dev_pm_detach().\n\nThis means these virtual devices are typically detached from its genpd,\nwhile runtime PM remains enabled for them, which is not how things are\ndesigned to work. In worst cases it may lead to critical errors, like a\nNULL pointer dereference bug in genpd_runtime_suspend(), which was recently\nreported. For another case, we may end up keeping an unnecessary vote for a\nperformance state for the device.\n\nTo fix these problems, let\u0027s add this missing call to pm_runtime_disable()\nin genpd_dev_pm_detach()."
        }
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      "providerMetadata": {
        "dateUpdated": "2026-06-19T12:00:08.563Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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          "url": "https://git.kernel.org/stable/c/8d44391a7f29e4601e8243f13498d0219bab2576"
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        {
          "url": "https://git.kernel.org/stable/c/26735dfdd8930d9ef1fa92e590a9bf77726efdf6"
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      "title": "pmdomain: core: Fix detach procedure for virtual devices in genpd",
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-46292",
    "datePublished": "2026-06-08T15:46:19.431Z",
    "dateReserved": "2026-05-13T15:03:33.110Z",
    "dateUpdated": "2026-06-19T12:00:08.563Z",
    "state": "PUBLISHED"
  },
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}


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