CVE-2022-49968
Estado: ModificadaMedia (4.7)—
In the Linux kernel, the following vulnerability has been resolved:
ieee802154/adf7242: defer destroy_workqueue call
There is a possible race condition (use-after-free) like below
The root cause for this race is that the upper layer (ieee802154) is unaware of this detaching event and the function adf7242_channel can be called without any checks.
To fix this, we can add a flag write at the beginning of adf7242_remove and add flag check in adf7242_channel. Or we can just defer the destructive operation like other commit 3e0588c291d6 ("hamradio: defer ax25 kfree after unregister_netdev") which let the ieee802154_unregister_hw() to handle the synchronization. This patch takes the second option.
Leer descripción completaMostrar menos
runs")
Detalles técnicos trazas, registros y código del informe original
(FREE) | (USE)
adf7242_remove | adf7242_channel
cancel_delayed_work_sync |
destroy_workqueue (1) | adf7242_cmd_rx
| mod_delayed_work (2)
|CVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
- Puntuación base: 4.7
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.25%
- Percentil entre todas las CVEs puntuadas: 15
- Fecha de la puntuación: 6/10/2026
EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).
Tecnologías afectadas (1)
CWE
- CWE-362, CWE-416
Referencias
- https://git.kernel.org/stable/c/15f3b89bd521d5770d36a61fc04a77c293138ba6
- https://git.kernel.org/stable/c/23a29932715ca43bceb2eae1bdb770995afe7271
- https://git.kernel.org/stable/c/9f8558c5c642c62c450c98c99b7d18a709fff485
- https://git.kernel.org/stable/c/afe7116f6d3b888778ed6d95e3cf724767b9aedf
- https://git.kernel.org/stable/c/bed12d7531df1417fc92c691999ff95e03835008
- https://git.kernel.org/stable/c/dede80aaf01f4b6e8657d23726cb4a3da226ec4c
JSON original (NVD)
Mostrar
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"value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: ieee802154/adf7242: aplazar la llamada a destroy_workqueue Existe una posible condición de ejecución (use-after-free) como la siguiente (FREE) | (USE) adf7242_remove | adf7242_channel cancel_delayed_work_sync | destroy_workqueue (1) | adf7242_cmd_rx | mod_delayed_work (2) | La causa raíz de esta ejecución es que la capa superior (ieee802154) desconoce este evento de desconexión y la función adf7242_channel se puede llamar sin ninguna comprobación. Para solucionar esto, podemos añadir una escritura de bandera al principio de adf7242_remove y añadir la comprobación de bandera en adf7242_channel. O podemos simplemente aplazar la operación destructiva como en el commit 3e0588c291d6 (\"hamradio: defer ax25 kfree after unregister_netdev\"), que permite que ieee802154_unregister_hw() gestione la sincronización. Este parche utiliza la segunda opción."
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