CVE-2026-98496 (GCVE-0-2026-98496)
Vulnerability from cvelistv5
Published
2026-10-18 15:16
Modified
2026-10-19 09:20
Severity ?
VLAI Severity ?
EPSS score ?
Summary
In the Linux kernel, the following vulnerability has been resolved:
net: airoha: npu: cancel wdt_work after releasing the WDT IRQ
airoha_npu_remove() calls cancel_work_sync() on each core's wdt_work,
but the watchdog IRQ that queues it is requested with devm_request_irq()
and is freed only after .remove() returns. airoha_npu_wdt_handler() can
therefore schedule_work() again once the cancel has returned. struct
airoha_npu, which contains the work, is devm_kzalloc()'d and is freed in
that same unwind, so the late work dereferences freed memory.
Register the work with devm_work_autocancel() before devm_request_irq()
and drop .remove(). Devres runs in reverse order, so the IRQ is freed
before cancel_work_sync(), including when probe fails. A cancel left in
.remove() cannot get that order. Initializing the work first also stops
a pending watchdog interrupt from queuing an uninitialized work item.
Probe currently calls INIT_WORK() only after devm_request_irq().
This issue was identified during our ongoing static-analysis research
while reviewing kernel code.
References
Impacted products
{
"containers": {
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"drivers/net/ethernet/airoha/airoha_npu.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
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"versionType": "git"
},
{
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"status": "affected",
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"versionType": "git"
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{
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"versionType": "git"
}
]
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"product": "Linux",
"programFiles": [
"drivers/net/ethernet/airoha/airoha_npu.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "6.15"
},
{
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"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.18.*",
"status": "unaffected",
"version": "6.18.55",
"versionType": "semver"
},
{
"lessThanOrEqual": "7.2.*",
"status": "unaffected",
"version": "7.2.9",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"vulnerable": true
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"negate": false,
"operator": "OR"
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],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: airoha: npu: cancel wdt_work after releasing the WDT IRQ\n\nairoha_npu_remove() calls cancel_work_sync() on each core\u0027s wdt_work,\nbut the watchdog IRQ that queues it is requested with devm_request_irq()\nand is freed only after .remove() returns. airoha_npu_wdt_handler() can\ntherefore schedule_work() again once the cancel has returned. struct\nairoha_npu, which contains the work, is devm_kzalloc()\u0027d and is freed in\nthat same unwind, so the late work dereferences freed memory.\n\nRegister the work with devm_work_autocancel() before devm_request_irq()\nand drop .remove(). Devres runs in reverse order, so the IRQ is freed\nbefore cancel_work_sync(), including when probe fails. A cancel left in\n.remove() cannot get that order. Initializing the work first also stops\na pending watchdog interrupt from queuing an uninitialized work item.\nProbe currently calls INIT_WORK() only after devm_request_irq().\n\nThis issue was identified during our ongoing static-analysis research\nwhile reviewing kernel code."
}
],
"providerMetadata": {
"dateUpdated": "2026-10-19T09:20:33.996Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
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"url": "https://git.kernel.org/stable/c/aca91d8fa0ecbc990ebf9a688c684dda78a43c00"
},
{
"url": "https://git.kernel.org/stable/c/da9d42531f3a6dfea2e9c775b62a46185dbf280a"
},
{
"url": "https://git.kernel.org/stable/c/4bdee8060d1e4581624e68fbd369b1afb14df4bc"
}
],
"title": "net: airoha: npu: cancel wdt_work after releasing the WDT IRQ",
"x_generator": {
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},
"cveMetadata": {
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"assignerShortName": "Linux",
"cveId": "CVE-2026-98496",
"datePublished": "2026-10-18T15:16:27.545Z",
"dateReserved": "2026-09-25T10:25:14.353Z",
"dateUpdated": "2026-10-19T09:20:33.996Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
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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.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- 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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