GHSA-GF86-6W2V-6JR9
Vulnerability from github – Published: 2026-02-04 18:30 – Updated: 2026-02-06 18:30In 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.
{
"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": []
}
Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
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- Confirmed: The vulnerability has been validated from an analyst's perspective.
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- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.