Vulnerability-Lookup

FKIE_CVE-2025-71073

Vulnerability from fkie_nvd - Published: 2026-01-13 16:16 - Updated: 2026-03-25 19:10

Severity ?

7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Summary

In the Linux kernel, the following vulnerability has been resolved: Input: lkkbd - disable pending work before freeing device lkkbd_interrupt() schedules lk->tq via schedule_work(), and the work handler lkkbd_reinit() dereferences the lkkbd structure and its serio/input_dev fields. lkkbd_disconnect() and error paths in lkkbd_connect() free the lkkbd structure without preventing the reinit work from being queued again until serio_close() returns. This can allow the work handler to run after the structure has been freed, leading to a potential use-after-free. Use disable_work_sync() instead of cancel_work_sync() to ensure the reinit work cannot be re-queued, and call it both in lkkbd_disconnect() and in lkkbd_connect() error paths after serio_open().

References

URL	Tags
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/3a7cd1397c209076c371d53bf39a55c138f62342	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/cffc4e29b1e2d44ab094cf142d7c461ff09b9104	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/e58c88f0cb2d8ed89de78f6f17409d29cfab6c5c	Patch

Impacted products

Vendor	Product	Version
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	2.6.12
linux	linux_kernel	2.6.12
linux	linux_kernel	2.6.12
linux	linux_kernel	2.6.12
linux	linux_kernel	2.6.12
linux	linux_kernel	6.19
linux	linux_kernel	6.19
linux	linux_kernel	6.19
linux	linux_kernel	6.19
linux	linux_kernel	6.19
linux	linux_kernel	6.19
linux	linux_kernel	6.19
linux	linux_kernel	6.19

JSON

To clipboard

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      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nInput: lkkbd - disable pending work before freeing device\n\nlkkbd_interrupt() schedules lk-\u003etq via schedule_work(), and the work\nhandler lkkbd_reinit() dereferences the lkkbd structure and its\nserio/input_dev fields.\n\nlkkbd_disconnect() and error paths in lkkbd_connect() free the lkkbd\nstructure without preventing the reinit work from being queued again\nuntil serio_close() returns. This can allow the work handler to run\nafter the structure has been freed, leading to a potential use-after-free.\n\nUse disable_work_sync() instead of cancel_work_sync() to ensure the\nreinit work cannot be re-queued, and call it both in lkkbd_disconnect()\nand in lkkbd_connect() error paths after serio_open()."
    },
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      "lang": "es",
      "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nInput: lkkbd - deshabilitar el trabajo pendiente antes de liberar el dispositivo\n\nlkkbd_interrupt() programa lk-\u0026gt;tq a trav\u00e9s de schedule_work(), y el manejador de trabajo lkkbd_reinit() desreferencia la estructura lkkbd y sus campos serio/input_dev.\n\nlkkbd_disconnect() y las rutas de error en lkkbd_connect() liberan la estructura lkkbd sin evitar que el trabajo de reinicio sea encolado de nuevo hasta que serio_close() retorne. Esto puede permitir que el manejador de trabajo se ejecute despu\u00e9s de que la estructura haya sido liberada, lo que lleva a un potencial uso despu\u00e9s de liberaci\u00f3n.\n\nUsar disable_work_sync() en lugar de cancel_work_sync() para asegurar que el trabajo de reinicio no pueda ser reencolado, y llamarlo tanto en lkkbd_disconnect() como en las rutas de error de lkkbd_connect() despu\u00e9s de serio_open()."
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  "id": "CVE-2025-71073",
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          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
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          "baseScore": 7.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
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CVE-2025-71073 (GCVE-0-2025-71073)

Vulnerability from cvelistv5 – Published: 2026-01-13 15:31 – Updated: 2026-02-09 08:34

Title

Input: lkkbd - disable pending work before freeing device

Summary

Severity ?

No CVSS data available.

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/3a7cd1397c209076c…
	https://git.kernel.org/stable/c/cffc4e29b1e2d44ab…
	https://git.kernel.org/stable/c/e58c88f0cb2d8ed89…

Impacted products

Vendor

Product

Version

Linux

Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 3a7cd1397c209076c371d53bf39a55c138f62342 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < cffc4e29b1e2d44ab094cf142d7c461ff09b9104 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < e58c88f0cb2d8ed89de78f6f17409d29cfab6c5c (git)

Linux

Affected: 2.6.12
Unaffected: 0 , < 2.6.12 (semver)
Unaffected: 6.12.64 , ≤ 6.12.* (semver)
Unaffected: 6.18.3 , ≤ 6.18.* (semver)
Unaffected: 6.19 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

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          "programFiles": [
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Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
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.

Detection rules are retrieved from Rulezet.

Action not permitted

FKIE_CVE-2025-71073

CVE-2025-71073 (GCVE-0-2025-71073)

Tags

Sightings

Nomenclature