CVE-2026-43479 (GCVE-0-2026-43479)
Vulnerability from cvelistv5 – Published: 2026-05-13 15:08 – Updated: 2026-05-13 15:08
VLAI?
Title
net: usb: lan78xx: fix WARN in __netif_napi_del_locked on disconnect
Summary
In the Linux kernel, the following vulnerability has been resolved:
net: usb: lan78xx: fix WARN in __netif_napi_del_locked on disconnect
Remove redundant netif_napi_del() call from disconnect path.
A WARN may be triggered in __netif_napi_del_locked() during USB device
disconnect:
WARNING: CPU: 0 PID: 11 at net/core/dev.c:7417 __netif_napi_del_locked+0x2b4/0x350
This happens because netif_napi_del() is called in the disconnect path while
NAPI is still enabled. However, it is not necessary to call netif_napi_del()
explicitly, since unregister_netdev() will handle NAPI teardown automatically
and safely. Removing the redundant call avoids triggering the warning.
Full trace:
lan78xx 1-1:1.0 enu1: Failed to read register index 0x000000c4. ret = -ENODEV
lan78xx 1-1:1.0 enu1: Failed to set MAC down with error -ENODEV
lan78xx 1-1:1.0 enu1: Link is Down
lan78xx 1-1:1.0 enu1: Failed to read register index 0x00000120. ret = -ENODEV
------------[ cut here ]------------
WARNING: CPU: 0 PID: 11 at net/core/dev.c:7417 __netif_napi_del_locked+0x2b4/0x350
Modules linked in: flexcan can_dev fuse
CPU: 0 UID: 0 PID: 11 Comm: kworker/0:1 Not tainted 6.16.0-rc2-00624-ge926949dab03 #9 PREEMPT
Hardware name: SKOV IMX8MP CPU revC - bd500 (DT)
Workqueue: usb_hub_wq hub_event
pstate: 60000005 (nZCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : __netif_napi_del_locked+0x2b4/0x350
lr : __netif_napi_del_locked+0x7c/0x350
sp : ffffffc085b673c0
x29: ffffffc085b673c0 x28: ffffff800b7f2000 x27: ffffff800b7f20d8
x26: ffffff80110bcf58 x25: ffffff80110bd978 x24: 1ffffff0022179eb
x23: ffffff80110bc000 x22: ffffff800b7f5000 x21: ffffff80110bc000
x20: ffffff80110bcf38 x19: ffffff80110bcf28 x18: dfffffc000000000
x17: ffffffc081578940 x16: ffffffc08284cee0 x15: 0000000000000028
x14: 0000000000000006 x13: 0000000000040000 x12: ffffffb0022179e8
x11: 1ffffff0022179e7 x10: ffffffb0022179e7 x9 : dfffffc000000000
x8 : 0000004ffdde8619 x7 : ffffff80110bcf3f x6 : 0000000000000001
x5 : ffffff80110bcf38 x4 : ffffff80110bcf38 x3 : 0000000000000000
x2 : 0000000000000000 x1 : 1ffffff0022179e7 x0 : 0000000000000000
Call trace:
__netif_napi_del_locked+0x2b4/0x350 (P)
lan78xx_disconnect+0xf4/0x360
usb_unbind_interface+0x158/0x718
device_remove+0x100/0x150
device_release_driver_internal+0x308/0x478
device_release_driver+0x1c/0x30
bus_remove_device+0x1a8/0x368
device_del+0x2e0/0x7b0
usb_disable_device+0x244/0x540
usb_disconnect+0x220/0x758
hub_event+0x105c/0x35e0
process_one_work+0x760/0x17b0
worker_thread+0x768/0xce8
kthread+0x3bc/0x690
ret_from_fork+0x10/0x20
irq event stamp: 211604
hardirqs last enabled at (211603): [<ffffffc0828cc9ec>] _raw_spin_unlock_irqrestore+0x84/0x98
hardirqs last disabled at (211604): [<ffffffc0828a9a84>] el1_dbg+0x24/0x80
softirqs last enabled at (211296): [<ffffffc080095f10>] handle_softirqs+0x820/0xbc8
softirqs last disabled at (210993): [<ffffffc080010288>] __do_softirq+0x18/0x20
---[ end trace 0000000000000000 ]---
lan78xx 1-1:1.0 enu1: failed to kill vid 0081/0
Severity ?
No CVSS data available.
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
e110bc82589752909e283ba5cbc160e0ab56c085 , < 20ce2bd1c1848414c5d3520d301ed3f5751ed634
(git)
Affected: e110bc82589752909e283ba5cbc160e0ab56c085 , < 395a8b903738511f536c97c427e15ef038e1a11c (git) Affected: e110bc82589752909e283ba5cbc160e0ab56c085 , < 312c816c6bc30342bc30dca0d6db617ab4d3ae4e (git) |
|
| Linux | Linux |
Affected:
6.17
Unaffected: 0 , < 6.17 (semver) Unaffected: 6.18.19 , ≤ 6.18.* (semver) Unaffected: 6.19.9 , ≤ 6.19.* (semver) Unaffected: 7.0 , ≤ * (original_commit_for_fix) |
{
"containers": {
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"drivers/net/usb/lan78xx.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"lessThan": "20ce2bd1c1848414c5d3520d301ed3f5751ed634",
"status": "affected",
"version": "e110bc82589752909e283ba5cbc160e0ab56c085",
"versionType": "git"
},
{
"lessThan": "395a8b903738511f536c97c427e15ef038e1a11c",
"status": "affected",
"version": "e110bc82589752909e283ba5cbc160e0ab56c085",
"versionType": "git"
},
{
"lessThan": "312c816c6bc30342bc30dca0d6db617ab4d3ae4e",
"status": "affected",
"version": "e110bc82589752909e283ba5cbc160e0ab56c085",
"versionType": "git"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"drivers/net/usb/lan78xx.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "6.17"
},
{
"lessThan": "6.17",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.18.*",
"status": "unaffected",
"version": "6.18.19",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.19.*",
"status": "unaffected",
"version": "6.19.9",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "7.0",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.18.19",
"versionStartIncluding": "6.17",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.19.9",
"versionStartIncluding": "6.17",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "7.0",
"versionStartIncluding": "6.17",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: usb: lan78xx: fix WARN in __netif_napi_del_locked on disconnect\n\nRemove redundant netif_napi_del() call from disconnect path.\n\nA WARN may be triggered in __netif_napi_del_locked() during USB device\ndisconnect:\n\n WARNING: CPU: 0 PID: 11 at net/core/dev.c:7417 __netif_napi_del_locked+0x2b4/0x350\n\nThis happens because netif_napi_del() is called in the disconnect path while\nNAPI is still enabled. However, it is not necessary to call netif_napi_del()\nexplicitly, since unregister_netdev() will handle NAPI teardown automatically\nand safely. Removing the redundant call avoids triggering the warning.\n\nFull trace:\n lan78xx 1-1:1.0 enu1: Failed to read register index 0x000000c4. ret = -ENODEV\n lan78xx 1-1:1.0 enu1: Failed to set MAC down with error -ENODEV\n lan78xx 1-1:1.0 enu1: Link is Down\n lan78xx 1-1:1.0 enu1: Failed to read register index 0x00000120. ret = -ENODEV\n ------------[ cut here ]------------\n WARNING: CPU: 0 PID: 11 at net/core/dev.c:7417 __netif_napi_del_locked+0x2b4/0x350\n Modules linked in: flexcan can_dev fuse\n CPU: 0 UID: 0 PID: 11 Comm: kworker/0:1 Not tainted 6.16.0-rc2-00624-ge926949dab03 #9 PREEMPT\n Hardware name: SKOV IMX8MP CPU revC - bd500 (DT)\n Workqueue: usb_hub_wq hub_event\n pstate: 60000005 (nZCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--)\n pc : __netif_napi_del_locked+0x2b4/0x350\n lr : __netif_napi_del_locked+0x7c/0x350\n sp : ffffffc085b673c0\n x29: ffffffc085b673c0 x28: ffffff800b7f2000 x27: ffffff800b7f20d8\n x26: ffffff80110bcf58 x25: ffffff80110bd978 x24: 1ffffff0022179eb\n x23: ffffff80110bc000 x22: ffffff800b7f5000 x21: ffffff80110bc000\n x20: ffffff80110bcf38 x19: ffffff80110bcf28 x18: dfffffc000000000\n x17: ffffffc081578940 x16: ffffffc08284cee0 x15: 0000000000000028\n x14: 0000000000000006 x13: 0000000000040000 x12: ffffffb0022179e8\n x11: 1ffffff0022179e7 x10: ffffffb0022179e7 x9 : dfffffc000000000\n x8 : 0000004ffdde8619 x7 : ffffff80110bcf3f x6 : 0000000000000001\n x5 : ffffff80110bcf38 x4 : ffffff80110bcf38 x3 : 0000000000000000\n x2 : 0000000000000000 x1 : 1ffffff0022179e7 x0 : 0000000000000000\n Call trace:\n __netif_napi_del_locked+0x2b4/0x350 (P)\n lan78xx_disconnect+0xf4/0x360\n usb_unbind_interface+0x158/0x718\n device_remove+0x100/0x150\n device_release_driver_internal+0x308/0x478\n device_release_driver+0x1c/0x30\n bus_remove_device+0x1a8/0x368\n device_del+0x2e0/0x7b0\n usb_disable_device+0x244/0x540\n usb_disconnect+0x220/0x758\n hub_event+0x105c/0x35e0\n process_one_work+0x760/0x17b0\n worker_thread+0x768/0xce8\n kthread+0x3bc/0x690\n ret_from_fork+0x10/0x20\n irq event stamp: 211604\n hardirqs last enabled at (211603): [\u003cffffffc0828cc9ec\u003e] _raw_spin_unlock_irqrestore+0x84/0x98\n hardirqs last disabled at (211604): [\u003cffffffc0828a9a84\u003e] el1_dbg+0x24/0x80\n softirqs last enabled at (211296): [\u003cffffffc080095f10\u003e] handle_softirqs+0x820/0xbc8\n softirqs last disabled at (210993): [\u003cffffffc080010288\u003e] __do_softirq+0x18/0x20\n ---[ end trace 0000000000000000 ]---\n lan78xx 1-1:1.0 enu1: failed to kill vid 0081/0"
}
],
"providerMetadata": {
"dateUpdated": "2026-05-13T15:08:27.932Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/20ce2bd1c1848414c5d3520d301ed3f5751ed634"
},
{
"url": "https://git.kernel.org/stable/c/395a8b903738511f536c97c427e15ef038e1a11c"
},
{
"url": "https://git.kernel.org/stable/c/312c816c6bc30342bc30dca0d6db617ab4d3ae4e"
}
],
"title": "net: usb: lan78xx: fix WARN in __netif_napi_del_locked on disconnect",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2026-43479",
"datePublished": "2026-05-13T15:08:27.932Z",
"dateReserved": "2026-05-01T14:12:56.012Z",
"dateUpdated": "2026-05-13T15:08:27.932Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2026-43479",
"date": "2026-05-20",
"epss": "0.00022",
"percentile": "0.06224"
},
"nvd": "{\"cve\":{\"id\":\"CVE-2026-43479\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-05-13T16:16:51.040\",\"lastModified\":\"2026-05-13T16:16:51.040\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nnet: usb: lan78xx: fix WARN in __netif_napi_del_locked on disconnect\\n\\nRemove redundant netif_napi_del() call from disconnect path.\\n\\nA WARN may be triggered in __netif_napi_del_locked() during USB device\\ndisconnect:\\n\\n WARNING: CPU: 0 PID: 11 at net/core/dev.c:7417 __netif_napi_del_locked+0x2b4/0x350\\n\\nThis happens because netif_napi_del() is called in the disconnect path while\\nNAPI is still enabled. However, it is not necessary to call netif_napi_del()\\nexplicitly, since unregister_netdev() will handle NAPI teardown automatically\\nand safely. Removing the redundant call avoids triggering the warning.\\n\\nFull trace:\\n lan78xx 1-1:1.0 enu1: Failed to read register index 0x000000c4. ret = -ENODEV\\n lan78xx 1-1:1.0 enu1: Failed to set MAC down with error -ENODEV\\n lan78xx 1-1:1.0 enu1: Link is Down\\n lan78xx 1-1:1.0 enu1: Failed to read register index 0x00000120. ret = -ENODEV\\n ------------[ cut here ]------------\\n WARNING: CPU: 0 PID: 11 at net/core/dev.c:7417 __netif_napi_del_locked+0x2b4/0x350\\n Modules linked in: flexcan can_dev fuse\\n CPU: 0 UID: 0 PID: 11 Comm: kworker/0:1 Not tainted 6.16.0-rc2-00624-ge926949dab03 #9 PREEMPT\\n Hardware name: SKOV IMX8MP CPU revC - bd500 (DT)\\n Workqueue: usb_hub_wq hub_event\\n pstate: 60000005 (nZCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--)\\n pc : __netif_napi_del_locked+0x2b4/0x350\\n lr : __netif_napi_del_locked+0x7c/0x350\\n sp : ffffffc085b673c0\\n x29: ffffffc085b673c0 x28: ffffff800b7f2000 x27: ffffff800b7f20d8\\n x26: ffffff80110bcf58 x25: ffffff80110bd978 x24: 1ffffff0022179eb\\n x23: ffffff80110bc000 x22: ffffff800b7f5000 x21: ffffff80110bc000\\n x20: ffffff80110bcf38 x19: ffffff80110bcf28 x18: dfffffc000000000\\n x17: ffffffc081578940 x16: ffffffc08284cee0 x15: 0000000000000028\\n x14: 0000000000000006 x13: 0000000000040000 x12: ffffffb0022179e8\\n x11: 1ffffff0022179e7 x10: ffffffb0022179e7 x9 : dfffffc000000000\\n x8 : 0000004ffdde8619 x7 : ffffff80110bcf3f x6 : 0000000000000001\\n x5 : ffffff80110bcf38 x4 : ffffff80110bcf38 x3 : 0000000000000000\\n x2 : 0000000000000000 x1 : 1ffffff0022179e7 x0 : 0000000000000000\\n Call trace:\\n __netif_napi_del_locked+0x2b4/0x350 (P)\\n lan78xx_disconnect+0xf4/0x360\\n usb_unbind_interface+0x158/0x718\\n device_remove+0x100/0x150\\n device_release_driver_internal+0x308/0x478\\n device_release_driver+0x1c/0x30\\n bus_remove_device+0x1a8/0x368\\n device_del+0x2e0/0x7b0\\n usb_disable_device+0x244/0x540\\n usb_disconnect+0x220/0x758\\n hub_event+0x105c/0x35e0\\n process_one_work+0x760/0x17b0\\n worker_thread+0x768/0xce8\\n kthread+0x3bc/0x690\\n ret_from_fork+0x10/0x20\\n irq event stamp: 211604\\n hardirqs last enabled at (211603): [\u003cffffffc0828cc9ec\u003e] _raw_spin_unlock_irqrestore+0x84/0x98\\n hardirqs last disabled at (211604): [\u003cffffffc0828a9a84\u003e] el1_dbg+0x24/0x80\\n softirqs last enabled at (211296): [\u003cffffffc080095f10\u003e] handle_softirqs+0x820/0xbc8\\n softirqs last disabled at (210993): [\u003cffffffc080010288\u003e] __do_softirq+0x18/0x20\\n ---[ end trace 0000000000000000 ]---\\n lan78xx 1-1:1.0 enu1: failed to kill vid 0081/0\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/20ce2bd1c1848414c5d3520d301ed3f5751ed634\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/312c816c6bc30342bc30dca0d6db617ab4d3ae4e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/395a8b903738511f536c97c427e15ef038e1a11c\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
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.
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