CVE-2026-90249 (GCVE-0-2026-90249)
Vulnerability from cvelistv5
Published
2026-09-17 16:07
Modified
2026-10-19 09:00
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: iio: light: gp2ap002: Fix unbalanced runtime PM on repeated event writes The IIO core does not filter duplicate writes to the event enable attribute, so writing the same value twice invokes write_event_config() twice. Enabling twice leaks a runtime PM reference, preventing the device from ever suspending again; disabling twice underflows the usage count and triggers a "Runtime PM usage count underflow" warning. Bail out early when the requested state matches the current state. While at it, switch to pm_runtime_resume_and_get() so a failed resume is propagated to userspace instead of silently marking the event enabled.
References
Impacted products
Vendor Product Version
Linux Linux Version: 97d642e23037c5545266f9564c9b81e6db81b122
Version: 97d642e23037c5545266f9564c9b81e6db81b122
Version: 97d642e23037c5545266f9564c9b81e6db81b122
Version: 97d642e23037c5545266f9564c9b81e6db81b122
Version: 97d642e23037c5545266f9564c9b81e6db81b122
Version: 97d642e23037c5545266f9564c9b81e6db81b122
Version: 97d642e23037c5545266f9564c9b81e6db81b122
Version: 97d642e23037c5545266f9564c9b81e6db81b122
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\niio: light: gp2ap002: Fix unbalanced runtime PM on repeated event writes\n\nThe IIO core does not filter duplicate writes to the event enable\nattribute, so writing the same value twice invokes\nwrite_event_config() twice. Enabling twice leaks a runtime PM\nreference, preventing the device from ever suspending again;\ndisabling twice underflows the usage count and triggers a\n\"Runtime PM usage count underflow\" warning.\n\nBail out early when the requested state matches the current state.\nWhile at it, switch to pm_runtime_resume_and_get() so a failed\nresume is propagated to userspace instead of silently marking the\nevent enabled."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-19T09:00:24.980Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
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        },
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          "url": "https://git.kernel.org/stable/c/685d9d1e5c47e024413981fb7eddab86132b04a1"
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          "url": "https://git.kernel.org/stable/c/8e76ab81319858736ccf23141e9415f9a1869337"
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        },
        {
          "url": "https://git.kernel.org/stable/c/579c049b4cb6fc72ce2c505fc5334540be0efcd3"
        }
      ],
      "title": "iio: light: gp2ap002: Fix unbalanced runtime PM on repeated event writes",
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  "cveMetadata": {
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-90249",
    "datePublished": "2026-09-17T16:07:50.766Z",
    "dateReserved": "2026-09-11T19:38:34.795Z",
    "dateUpdated": "2026-10-19T09:00:24.980Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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