CVE-2025-39805
Full vulnerability record from the local CVENow database.
Description
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: ------------[ 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 ... 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().
Severity
MEDIUM
CVSS score
5.5
(v3.1)
Vulnerability status
Modified
Source identifier
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Published
2025-09-16 13:15:50.750000
Last modified
2026-10-19 21:10:00.160000
View original CVE JSON
{
"id": "CVE-2025-39805",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"published": "2025-09-16T13:15:50.750",
"lastModified": "2026-10-19T21:10:00.160",
"vulnStatus": "Modified",
"cveTags": [],
"descriptions": [
{
"lang": "en",
"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()."
},
{
"lang": "es",
"value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nnet: macb: corregir el orden de llamada de unregister_netdev en macb_remove()\n\nAl eliminar un dispositivo macb, el controlador llama a phy_exit() antes de unregister_netdev(). Esto lleva a una ADVERTENCIA de kernfs:\n\n ------------[ cortar aquí ]------------\n kernfs: no se puede eliminar 'attached_dev', no hay directorio\n ADVERTENCIA: CPU: 1 PID: 27146 en fs/kernfs/dir.c:1683\n Rastro de llamada:\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\nLa advertencia ocurre porque el PHY está siendo salido mientras el netdev aún está registrado. El orden correcto es desregistrar el netdev antes de apagar el PHY y limpiar el bus MDIO.\n\nCorregir esto moviendo unregister_netdev() antes de phy_exit() en macb_remove()."
}
],
"affected": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"affectedData": [
{
"vendor": "Linux",
"product": "Linux",
"defaultStatus": "unaffected",
"programFiles": [
"drivers/net/ethernet/cadence/macb_main.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"versions": [
{
"version": "8b73fa3ae02b2401960de41b0454c0321377b203",
"lessThan": "7351782f2fc8ac31ced52e3d4e6fa120f819a7ab",
"versionType": "git",
"status": "affected"
},
{
"version": "8b73fa3ae02b2401960de41b0454c0321377b203",
"lessThan": "2b9719ccad38dffad7dbdd2f39896f723f9b9011",
"versionType": "git",
"status": "affected"
},
{
"version": "8b73fa3ae02b2401960de41b0454c0321377b203",
"lessThan": "ff0d3bad32108b57265e5b48f15327549af771d3",
"versionType": "git",
"status": "affected"
},
{
"version": "8b73fa3ae02b2401960de41b0454c0321377b203",
"lessThan": "775fe690fd4a3337ad2115de2adb41b227d4dae7",
"versionType": "git",
"status": "affected"
},
{
"version": "8b73fa3ae02b2401960de41b0454c0321377b203",
"lessThan": "01b9128c5db1b470575d07b05b67ffa3cb02ebf1",
"versionType": "git",
"status": "affected"
}
]
},
{
"vendor": "Linux",
"product": "Linux",
"defaultStatus": "affected",
"programFiles": [
"drivers/net/ethernet/cadence/macb_main.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"versions": [
{
"version": "5.18",
"status": "affected"
},
{
"version": "0",
"lessThan": "5.18",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.1.159",
"lessThanOrEqual": "6.1.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.6.119",
"lessThanOrEqual": "6.6.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.12.45",
"lessThanOrEqual": "6.12.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.16.5",
"lessThanOrEqual": "6.16.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.17",
"lessThanOrEqual": "*",
"versionType": "original_commit_for_fix",
"status": "unaffected"
}
]
}
]
}
],
"metrics": {
"cvssMetricV31": [
{
"source": "[email protected]",
"type": "Primary",
"cvssData": {
"version": "3.1",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"baseScore": 5.5,
"baseSeverity": "MEDIUM",
"attackVector": "LOCAL",
"attackComplexity": "LOW",
"privilegesRequired": "LOW",
"userInteraction": "NONE",
"scope": "UNCHANGED",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"availabilityImpact": "HIGH"
},
"exploitabilityScore": 1.8,
"impactScore": 3.6
}
]
},
"weaknesses": [
{
"source": "[email protected]",
"type": "Primary",
"description": [
{
"lang": "en",
"value": "NVD-CWE-noinfo"
}
]
}
],
"configurations": [
{
"nodes": [
{
"operator": "OR",
"negate": false,
"cpeMatch": [
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "5.18",
"versionEndExcluding": "6.12.45",
"matchCriteriaId": "66C144FE-7532-4F32-8D73-D42F84E0C8EB"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "6.13",
"versionEndExcluding": "6.16.5",
"matchCriteriaId": "EB781080-7001-4FA1-B388-517FFEFBC73E"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:6.17:rc1:*:*:*:*:*:*",
"matchCriteriaId": "327D22EF-390B-454C-BD31-2ED23C998A1C"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:6.17:rc2:*:*:*:*:*:*",
"matchCriteriaId": "C730CD9A-D969-4A8E-9522-162AAF7C0EE9"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:6.17:rc3:*:*:*:*:*:*",
"matchCriteriaId": "39982C4B-716E-4B2F-8196-FA301F47807D"
}
]
}
]
}
],
"references": [
{
"url": "https://git.kernel.org/stable/c/01b9128c5db1b470575d07b05b67ffa3cb02ebf1",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
]
},
{
"url": "https://git.kernel.org/stable/c/2b9719ccad38dffad7dbdd2f39896f723f9b9011",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/7351782f2fc8ac31ced52e3d4e6fa120f819a7ab",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/775fe690fd4a3337ad2115de2adb41b227d4dae7",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
]
},
{
"url": "https://git.kernel.org/stable/c/ff0d3bad32108b57265e5b48f15327549af771d3",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
]
}
]
}