CVE-2025-39805 (GCVE-0-2025-39805)
Vulnerability from cvelistv5
Published
2025-09-16 13:00
Modified
2025-09-16 13:00
Severity ?
VLAI Severity ?
EPSS score ?
Summary
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().
References
Impacted products
{
"containers": {
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"drivers/net/ethernet/cadence/macb_main.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
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"status": "affected",
"version": "8b73fa3ae02b2401960de41b0454c0321377b203",
"versionType": "git"
},
{
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"status": "affected",
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"versionType": "git"
},
{
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"status": "affected",
"version": "8b73fa3ae02b2401960de41b0454c0321377b203",
"versionType": "git"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"drivers/net/ethernet/cadence/macb_main.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "5.18"
},
{
"lessThan": "5.18",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"version": "6.12.45",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.16.*",
"status": "unaffected",
"version": "6.16.5",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "6.17-rc4",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.12.45",
"versionStartIncluding": "5.18",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"vulnerable": true
},
{
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"versionEndExcluding": "6.17-rc4",
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}
],
"negate": false,
"operator": "OR"
}
]
}
],
"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 \u0027attached_dev\u0027, 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()."
}
],
"providerMetadata": {
"dateUpdated": "2025-09-16T13:00:06.731Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/ff0d3bad32108b57265e5b48f15327549af771d3"
},
{
"url": "https://git.kernel.org/stable/c/775fe690fd4a3337ad2115de2adb41b227d4dae7"
},
{
"url": "https://git.kernel.org/stable/c/01b9128c5db1b470575d07b05b67ffa3cb02ebf1"
}
],
"title": "net: macb: fix unregister_netdev call order in macb_remove()",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2025-39805",
"datePublished": "2025-09-16T13:00:06.731Z",
"dateReserved": "2025-04-16T07:20:57.136Z",
"dateUpdated": "2025-09-16T13:00:06.731Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1",
"vulnerability-lookup:meta": {
"nvd": "{\"cve\":{\"id\":\"CVE-2025-39805\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-09-16T13:15:50.750\",\"lastModified\":\"2025-09-18T13:43:45.290\",\"vulnStatus\":\"Awaiting Analysis\",\"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 \u0027attached_dev\u0027, 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().\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/01b9128c5db1b470575d07b05b67ffa3cb02ebf1\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/775fe690fd4a3337ad2115de2adb41b227d4dae7\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/ff0d3bad32108b57265e5b48f15327549af771d3\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
}
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
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- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
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