CVE-2026-92506 (GCVE-0-2026-92506)
Vulnerability from cvelistv5 – Published: 2026-09-17 16:10 – Updated: 2026-09-17 16:10
VLAI
EPSS
VEX
Title
firmware: arm_scmi: Fix requested device removal race
Summary
In the Linux kernel, the following vulnerability has been resolved:
firmware: arm_scmi: Fix requested device removal race
scmi_protocol_device_unrequest() drops scmi_requested_devices_mtx while
notifying listeners but continues to retain the per-protocol list head.
When two SCMI drivers for the same protocol unregister concurrently, one
thread can remove the final request and free the list head while the other
is running its notifier. The latter then dereferences the freed list head
after reacquiring the mutex and can free it a second time.
Complete the list and IDR updates, including freeing an empty list head,
before dropping the mutex. Keep the blocking notifier outside the critical
section and retain only the detached request across the callback.
Severity
No CVSS data available.
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
d3cd7c525fd2ecce3a6c963f314969a54783d211 , < 2ff7713b7308cd6bea3328f7cd750b5eaab42af3
(git)
Affected: d3cd7c525fd2ecce3a6c963f314969a54783d211 , < 1c35915eaaa81a12340c838c5c2ccb02be2194c3 (git) Affected: d3cd7c525fd2ecce3a6c963f314969a54783d211 , < c3d4ef1c0ca6917aad6f1093b49f3932944a8c19 (git) Affected: d3cd7c525fd2ecce3a6c963f314969a54783d211 , < 21d35c5f46e99e9047bb9ded3ecb5ab440dd75b3 (git) Affected: d3cd7c525fd2ecce3a6c963f314969a54783d211 , < 2c4097e6c4aed276c5e9ec2ab331ab397ea780bf (git) |
guessed | |
| Linux | Linux |
Affected:
6.3
Unaffected: 0 , < 6.3 (semver) Unaffected: 6.6.157 , ≤ 6.6.* (semver) Unaffected: 6.12.110 , ≤ 6.12.* (semver) Unaffected: 6.18.52 , ≤ 6.18.* (semver) Unaffected: 7.2.6 , ≤ 7.2.* (semver) Unaffected: 7.3-rc1 , ≤ * (original_commit_for_fix) |
guessed |
{
"containers": {
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"product": "Linux",
"programFiles": [
"drivers/firmware/arm_scmi/bus.c"
],
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"vendor": "Linux",
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"versionType": "git"
},
{
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],
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"vendor": "Linux",
"versions": [
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},
{
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"status": "unaffected",
"version": "0",
"versionType": "semver"
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{
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"versionType": "semver"
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{
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"versionType": "semver"
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{
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"version": "6.18.52",
"versionType": "semver"
},
{
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"status": "unaffected",
"version": "7.2.6",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "7.3-rc1",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.6.157",
"versionStartIncluding": "6.3",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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{
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{
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},
{
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"versionEndExcluding": "7.3-rc1",
"versionStartIncluding": "6.3",
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}
],
"negate": false,
"operator": "OR"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nfirmware: arm_scmi: Fix requested device removal race\n\nscmi_protocol_device_unrequest() drops scmi_requested_devices_mtx while\nnotifying listeners but continues to retain the per-protocol list head.\nWhen two SCMI drivers for the same protocol unregister concurrently, one\nthread can remove the final request and free the list head while the other\nis running its notifier. The latter then dereferences the freed list head\nafter reacquiring the mutex and can free it a second time.\n\nComplete the list and IDR updates, including freeing an empty list head,\nbefore dropping the mutex. Keep the blocking notifier outside the critical\nsection and retain only the detached request across the callback."
}
],
"providerMetadata": {
"dateUpdated": "2026-09-17T16:10:18.067Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/2ff7713b7308cd6bea3328f7cd750b5eaab42af3"
},
{
"url": "https://git.kernel.org/stable/c/1c35915eaaa81a12340c838c5c2ccb02be2194c3"
},
{
"url": "https://git.kernel.org/stable/c/c3d4ef1c0ca6917aad6f1093b49f3932944a8c19"
},
{
"url": "https://git.kernel.org/stable/c/21d35c5f46e99e9047bb9ded3ecb5ab440dd75b3"
},
{
"url": "https://git.kernel.org/stable/c/2c4097e6c4aed276c5e9ec2ab331ab397ea780bf"
}
],
"title": "firmware: arm_scmi: Fix requested device removal race",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2026-92506",
"datePublished": "2026-09-17T16:10:18.067Z",
"dateReserved": "2026-09-16T12:21:13.872Z",
"dateUpdated": "2026-09-17T16:10:18.067Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"nvd": {
"cve": {
"affected": [
{
"affectedData": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"drivers/firmware/arm_scmi/bus.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
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{
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{
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{
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"drivers/firmware/arm_scmi/bus.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "6.3"
},
{
"lessThan": "6.3",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"version": "6.6.157",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"version": "6.12.110",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.18.*",
"status": "unaffected",
"version": "6.18.52",
"versionType": "semver"
},
{
"lessThanOrEqual": "7.2.*",
"status": "unaffected",
"version": "7.2.6",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "7.3-rc1",
"versionType": "original_commit_for_fix"
}
]
}
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nfirmware: arm_scmi: Fix requested device removal race\n\nscmi_protocol_device_unrequest() drops scmi_requested_devices_mtx while\nnotifying listeners but continues to retain the per-protocol list head.\nWhen two SCMI drivers for the same protocol unregister concurrently, one\nthread can remove the final request and free the list head while the other\nis running its notifier. The latter then dereferences the freed list head\nafter reacquiring the mutex and can free it a second time.\n\nComplete the list and IDR updates, including freeing an empty list head,\nbefore dropping the mutex. Keep the blocking notifier outside the critical\nsection and retain only the detached request across the callback."
}
],
"id": "CVE-2026-92506",
"lastModified": "2026-09-17T17:17:53.187",
"metrics": {},
"published": "2026-09-17T17:17:53.187",
"references": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/1c35915eaaa81a12340c838c5c2ccb02be2194c3"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/21d35c5f46e99e9047bb9ded3ecb5ab440dd75b3"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/2c4097e6c4aed276c5e9ec2ab331ab397ea780bf"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/2ff7713b7308cd6bea3328f7cd750b5eaab42af3"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/c3d4ef1c0ca6917aad6f1093b49f3932944a8c19"
}
],
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"vulnStatus": "Received"
}
},
"suse_vex": {
"aggregate_severity": "not set",
"current_release_date": "2026-09-18T00:13:29Z",
"cve": "CVE-2026-92506",
"id": "CVE-2026-92506",
"initial_release_date": "2026-09-18T00:13:29Z",
"source": "SUSE CSAF VEX",
"status": "interim",
"title": "SUSE CVE CVE-2026-92506",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-92506.json",
"version": "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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