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GHSA-GF86-6W2V-6JR9

Vulnerability from github – Published: 2026-02-04 18:30 – Updated: 2026-02-06 18:30
VLAI
Details

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

iio: adc: at91-sama5d2_adc: Fix potential use-after-free in sama5d2_adc driver

at91_adc_interrupt can call at91_adc_touch_data_handler function to start the work by schedule_work(&st->touch_st.workq).

If we remove the module which will call at91_adc_remove to make cleanup, it will free indio_dev through iio_device_unregister but quite a bit later. While the work mentioned above will be used. The sequence of operations that may lead to a UAF bug is as follows:

CPU0 CPU1

                                 | at91_adc_workq_handler

at91_adc_remove | iio_device_unregister(indio_dev) | //free indio_dev a bit later | | iio_push_to_buffers(indio_dev) | //use indio_dev

Fix it by ensuring that the work is canceled before proceeding with the cleanup in at91_adc_remove.

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{
  "affected": [],
  "aliases": [
    "CVE-2025-71199"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-02-04T17:16:11Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\niio: adc: at91-sama5d2_adc: Fix potential use-after-free in sama5d2_adc driver\n\nat91_adc_interrupt can call at91_adc_touch_data_handler function\nto start the work by schedule_work(\u0026st-\u003etouch_st.workq).\n\nIf we remove the module which will call at91_adc_remove to\nmake cleanup, it will free indio_dev through iio_device_unregister but\nquite a bit later. While the work mentioned above will be used. The\nsequence of operations that may lead to a UAF bug is as follows:\n\nCPU0                                      CPU1\n\n                                     | at91_adc_workq_handler\nat91_adc_remove                      |\niio_device_unregister(indio_dev)     |\n//free indio_dev a bit later         |\n                                     | iio_push_to_buffers(indio_dev)\n                                     | //use indio_dev\n\nFix it by ensuring that the work is canceled before proceeding with\nthe cleanup in at91_adc_remove.",
  "id": "GHSA-gf86-6w2v-6jr9",
  "modified": "2026-02-06T18:30:30Z",
  "published": "2026-02-04T18:30:42Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-71199"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4c83dd62595ee7b7c9298a4d19a256b6647e7240"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/919d176b05776c7ede79c36744c823a07d631617"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9795fe80976f8c31cafda7d44edfc0f532d1f7c4"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d7b6fc224c7f5d6d8adcb18037138d3cfe2bbdfe"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d890234a91570542c228a20f132ce74f9fedd904"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/dbdb442218cd9d613adeab31a88ac973f22c4873"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/fdc8c835c637a3473878d1e7438c77ab8928af63"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}



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