CVE-2025-39805
Estado: ModificadaMedia (5.5)—
In the Linux kernel, the following vulnerability has been resolved:
net: macb: fix unregister_netdev call order in macb_remove()
When removing a macb device, the driver calls phy_exit() before unregister_netdev(). This leads to a WARN from kernfs:
The warning happens because the PHY is being exited while the netdev is still registered. The correct order is to unregister the netdev before shutting down the PHY and cleaning up the MDIO bus.
Fix this by moving unregister_netdev() ahead of phy_exit() in macb_remove().
Detalles técnicos trazas, registros y código del informe original
------------[ cut here ]------------
kernfs: can not remove 'attached_dev', no directory
WARNING: CPU: 1 PID: 27146 at fs/kernfs/dir.c:1683
Call trace:
kernfs_remove_by_name_ns+0xd8/0xf0
sysfs_remove_link+0x24/0x58
phy_detach+0x5c/0x168
phy_disconnect+0x4c/0x70
phylink_disconnect_phy+0x6c/0xc0 [phylink]
macb_close+0x6c/0x170 [macb]
...
macb_remove+0x60/0x168 [macb]
platform_remove+0x5c/0x80
...CVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- Puntuación base: 5.5
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.16%
- Percentil entre todas las CVEs puntuadas: 5
- 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
- NVD-CWE-noinfo
Referencias
- https://git.kernel.org/stable/c/01b9128c5db1b470575d07b05b67ffa3cb02ebf1
- https://git.kernel.org/stable/c/2b9719ccad38dffad7dbdd2f39896f723f9b9011
- https://git.kernel.org/stable/c/7351782f2fc8ac31ced52e3d4e6fa120f819a7ab
- https://git.kernel.org/stable/c/775fe690fd4a3337ad2115de2adb41b227d4dae7
- https://git.kernel.org/stable/c/ff0d3bad32108b57265e5b48f15327549af771d3
JSON original (NVD)
Mostrar
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: macb: fix unregister_netdev call order in macb_remove()\n\nWhen removing a macb device, the driver calls phy_exit() before\nunregister_netdev(). This leads to a WARN from kernfs:\n\n ------------[ cut here ]------------\n kernfs: can not remove 'attached_dev', no directory\n WARNING: CPU: 1 PID: 27146 at fs/kernfs/dir.c:1683\n Call trace:\n kernfs_remove_by_name_ns+0xd8/0xf0\n sysfs_remove_link+0x24/0x58\n phy_detach+0x5c/0x168\n phy_disconnect+0x4c/0x70\n phylink_disconnect_phy+0x6c/0xc0 [phylink]\n macb_close+0x6c/0x170 [macb]\n ...\n macb_remove+0x60/0x168 [macb]\n platform_remove+0x5c/0x80\n ...\n\nThe warning happens because the PHY is being exited while the netdev\nis still registered. The correct order is to unregister the netdev\nbefore shutting down the PHY and cleaning up the MDIO bus.\n\nFix this by moving unregister_netdev() ahead of phy_exit() in\nmacb_remove()."
}
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