CVE-2025-21917 (GCVE-0-2025-21917)
Vulnerability from cvelistv5 – Published: 2025-04-01 15:40 – Updated: 2026-05-11 21:09
VLAI
EPSS
VEX
Title
usb: renesas_usbhs: Flush the notify_hotplug_work
Summary
In the Linux kernel, the following vulnerability has been resolved:
usb: renesas_usbhs: Flush the notify_hotplug_work
When performing continuous unbind/bind operations on the USB drivers
available on the Renesas RZ/G2L SoC, a kernel crash with the message
"Unable to handle kernel NULL pointer dereference at virtual address"
may occur. This issue points to the usbhsc_notify_hotplug() function.
Flush the delayed work to avoid its execution when driver resources are
unavailable.
Severity
5.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-10-01 19:24 UTC
CWE
- CWE-476 - NULL Pointer Dereference
Assigner
References
10 references
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
bc57381e634782009b1cb2e86b18013699ada576 , < 4cd847a7b630a85493d0294ad9542c21aafaa246
(git)
Affected: bc57381e634782009b1cb2e86b18013699ada576 , < 394965f90454d6f00fe11879142b720c6c1a872e (git) Affected: bc57381e634782009b1cb2e86b18013699ada576 , < 3248c1f833f924246cb98ce7da4569133c1b2292 (git) Affected: bc57381e634782009b1cb2e86b18013699ada576 , < 4ca078084cdd5f32d533311d6a0b63a60dcadd41 (git) Affected: bc57381e634782009b1cb2e86b18013699ada576 , < d50f5c0cd949593eb9a3d822b34d7b50046a06b7 (git) Affected: bc57381e634782009b1cb2e86b18013699ada576 , < e5aac1c9b2974636db7ce796ffa6de88fa08335e (git) Affected: bc57381e634782009b1cb2e86b18013699ada576 , < 830818c8e70c0364e377f0c243b28061ef7967eb (git) Affected: bc57381e634782009b1cb2e86b18013699ada576 , < 552ca6b87e3778f3dd5b87842f95138162e16c82 (git) |
guessed | |
| Linux | Linux |
Affected:
3.0
Unaffected: 0 , < 3.0 (semver) Unaffected: 5.4.291 , ≤ 5.4.* (semver) Unaffected: 5.10.235 , ≤ 5.10.* (semver) Unaffected: 5.15.179 , ≤ 5.15.* (semver) Unaffected: 6.1.131 , ≤ 6.1.* (semver) Unaffected: 6.6.83 , ≤ 6.6.* (semver) Unaffected: 6.12.19 , ≤ 6.12.* (semver) Unaffected: 6.13.7 , ≤ 6.13.* (semver) Unaffected: 6.14 , ≤ * (original_commit_for_fix) |
guessed |
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"availabilityImpact": "HIGH",
"baseScore": 5.5,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
},
"exploitabilityScore": 1.8,
"impactScore": 3.6,
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"type": "Secondary"
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"id": "CVE-2025-21917",
"options": [
{
"exploitation": "none"
},
{
"automatable": "no"
},
{
"technicalImpact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2025-10-01T19:24:08.656222Z",
"version": "2.0.3"
}
}
]
},
"published": "2025-04-01T16:15:22.350",
"references": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
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],
"url": "https://git.kernel.org/stable/c/3248c1f833f924246cb98ce7da4569133c1b2292"
},
{
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"tags": [
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],
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},
{
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],
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},
{
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"tags": [
"Patch"
],
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},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
],
"url": "https://git.kernel.org/stable/c/552ca6b87e3778f3dd5b87842f95138162e16c82"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
],
"url": "https://git.kernel.org/stable/c/830818c8e70c0364e377f0c243b28061ef7967eb"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
],
"url": "https://git.kernel.org/stable/c/d50f5c0cd949593eb9a3d822b34d7b50046a06b7"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
],
"url": "https://git.kernel.org/stable/c/e5aac1c9b2974636db7ce796ffa6de88fa08335e"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html"
}
],
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"vulnStatus": "Modified",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-476"
}
],
"source": "nvd@nist.gov",
"type": "Primary"
},
{
"description": [
{
"lang": "en",
"value": "CWE-476"
}
],
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"type": "Secondary"
}
]
}
},
"redhat_vex": {
"aggregate_severity": "Moderate",
"current_release_date": "2026-06-30T00:05:18+00:00",
"cve": "CVE-2025-21917",
"id": "CVE-2025-21917",
"initial_release_date": "2025-04-01T00:00:00+00:00",
"product_status:known_not_affected": "274",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "kernel: usb: renesas_usbhs: Flush the notify_hotplug_work",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-21917.json",
"version": "3"
},
"vulnrichment": {
"containers": {
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{
"providerMetadata": {
"dateUpdated": "2025-11-03T19:39:08.336Z",
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
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},
{
"url": "https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html"
}
],
"title": "CVE Program Container"
},
{
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 5.5,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
}
},
{
"other": {
"content": {
"id": "CVE-2025-21917",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2025-10-01T19:24:08.656222Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-476",
"description": "CWE-476 NULL Pointer Dereference",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2025-10-01T14:37:38.974Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"drivers/usb/renesas_usbhs/common.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
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"status": "affected",
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"versionType": "git"
},
{
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"status": "affected",
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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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},
{
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},
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"status": "affected",
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},
{
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"status": "affected",
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}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
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],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
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"version": "3.0"
},
{
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"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
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"status": "unaffected",
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},
{
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"status": "unaffected",
"version": "5.10.235",
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},
{
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"status": "unaffected",
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},
{
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"status": "unaffected",
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},
{
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},
{
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},
{
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},
{
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"status": "unaffected",
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}
]
}
],
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{
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{
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}
],
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}
],
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nusb: renesas_usbhs: Flush the notify_hotplug_work\n\nWhen performing continuous unbind/bind operations on the USB drivers\navailable on the Renesas RZ/G2L SoC, a kernel crash with the message\n\"Unable to handle kernel NULL pointer dereference at virtual address\"\nmay occur. This issue points to the usbhsc_notify_hotplug() function.\n\nFlush the delayed work to avoid its execution when driver resources are\nunavailable."
}
],
"providerMetadata": {
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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},
{
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},
{
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},
{
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},
{
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},
{
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},
{
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},
{
"url": "https://git.kernel.org/stable/c/552ca6b87e3778f3dd5b87842f95138162e16c82"
}
],
"title": "usb: renesas_usbhs: Flush the notify_hotplug_work",
"x_generator": {
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}
}
},
"cveMetadata": {
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"cveId": "CVE-2025-21917",
"datePublished": "2025-04-01T15:40:53.042Z",
"dateReserved": "2024-12-29T08:45:45.787Z",
"dateUpdated": "2026-05-11T21:09:01.951Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
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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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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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