CVE-2025-40035 (GCVE-0-2025-40035)
Vulnerability from cvelistv5 – Published: 2025-10-28 11:48 – Updated: 2026-05-11 21:41
VLAI
EPSS
VEX
Title
Input: uinput - zero-initialize uinput_ff_upload_compat to avoid info leak
Summary
In the Linux kernel, the following vulnerability has been resolved:
Input: uinput - zero-initialize uinput_ff_upload_compat to avoid info leak
Struct ff_effect_compat is embedded twice inside
uinput_ff_upload_compat, contains internal padding. In particular, there
is a hole after struct ff_replay to satisfy alignment requirements for
the following union member. Without clearing the structure,
copy_to_user() may leak stack data to userspace.
Initialize ff_up_compat to zero before filling valid fields.
Severity
No CVSS data available.
Assigner
References
8 references
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
2d56f3a32c0e62f99c043d2579840f9731fe5855 , < 1b317796013f666ae5040edbf0f230ec61496d42
(git)
Affected: 2d56f3a32c0e62f99c043d2579840f9731fe5855 , < 877172b97786ed1678640dff0b2d35abb328844c (git) Affected: 2d56f3a32c0e62f99c043d2579840f9731fe5855 , < e63aade22a33e77b93c98c9f02db504d897a76b4 (git) Affected: 2d56f3a32c0e62f99c043d2579840f9731fe5855 , < 933b87c4590b42500299f00ff55f555903056803 (git) Affected: 2d56f3a32c0e62f99c043d2579840f9731fe5855 , < fd8a23ecbc602d00e47b27f20b07350867d0ebe5 (git) Affected: 2d56f3a32c0e62f99c043d2579840f9731fe5855 , < 48c96b7e9e03516936d6deba54b5553097eae817 (git) Affected: 2d56f3a32c0e62f99c043d2579840f9731fe5855 , < f5e1f3b85aadce74268c46676772c3e9fa79897e (git) Affected: 2d56f3a32c0e62f99c043d2579840f9731fe5855 , < d3366a04770eea807f2826cbdb96934dd8c9bf79 (git) |
guessed | |
| Linux | Linux |
Affected:
2.6.29
Unaffected: 0 , < 2.6.29 (semver) Unaffected: 5.4.301 , ≤ 5.4.* (semver) Unaffected: 5.10.246 , ≤ 5.10.* (semver) Unaffected: 5.15.195 , ≤ 5.15.* (semver) Unaffected: 6.1.156 , ≤ 6.1.* (semver) Unaffected: 6.6.112 , ≤ 6.6.* (semver) Unaffected: 6.12.53 , ≤ 6.12.* (semver) Unaffected: 6.17.3 , ≤ 6.17.* (semver) Unaffected: 6.18 , ≤ * (original_commit_for_fix) |
guessed |
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"vendor": "Linux",
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{
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"version": "2.6.29"
},
{
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"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
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"status": "unaffected",
"version": "5.4.301",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"version": "5.10.246",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"version": "5.15.195",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"version": "6.1.156",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"version": "6.6.112",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"version": "6.12.53",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.17.*",
"status": "unaffected",
"version": "6.17.3",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "6.18",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
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"nodes": [
{
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"vulnerable": true
},
{
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},
{
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"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nInput: uinput - zero-initialize uinput_ff_upload_compat to avoid info leak\n\nStruct ff_effect_compat is embedded twice inside\nuinput_ff_upload_compat, contains internal padding. In particular, there\nis a hole after struct ff_replay to satisfy alignment requirements for\nthe following union member. Without clearing the structure,\ncopy_to_user() may leak stack data to userspace.\n\nInitialize ff_up_compat to zero before filling valid fields."
}
],
"providerMetadata": {
"dateUpdated": "2026-05-11T21:41:13.342Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
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"url": "https://git.kernel.org/stable/c/1b317796013f666ae5040edbf0f230ec61496d42"
},
{
"url": "https://git.kernel.org/stable/c/877172b97786ed1678640dff0b2d35abb328844c"
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},
{
"url": "https://git.kernel.org/stable/c/d3366a04770eea807f2826cbdb96934dd8c9bf79"
}
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"datePublished": "2025-10-28T11:48:17.030Z",
"dateReserved": "2025-04-16T07:20:57.153Z",
"dateUpdated": "2026-05-11T21:41:13.342Z",
"state": "PUBLISHED"
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"vulnerability-lookup:meta": {
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"date": "2026-09-24",
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"source": "Microsoft CSAF VEX",
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"title": "Input: uinput - zero-initialize uinput_ff_upload_compat to avoid info leak",
"url": "https://msrc.microsoft.com/csaf/vex/2025/msrc_cve-2025-40035.json",
"version": "1"
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{
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{
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{
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},
{
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"version": "6.17.3",
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},
{
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"cveTags": [],
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nInput: uinput - zero-initialize uinput_ff_upload_compat to avoid info leak\n\nStruct ff_effect_compat is embedded twice inside\nuinput_ff_upload_compat, contains internal padding. In particular, there\nis a hole after struct ff_replay to satisfy alignment requirements for\nthe following union member. Without clearing the structure,\ncopy_to_user() may leak stack data to userspace.\n\nInitialize ff_up_compat to zero before filling valid fields."
}
],
"id": "CVE-2025-40035",
"lastModified": "2026-06-17T09:21:09.413",
"metrics": {},
"published": "2025-10-28T12:15:37.363",
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"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"vulnStatus": "Deferred"
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"redhat_vex": {
"aggregate_severity": "Low",
"current_release_date": "2026-06-30T10:27:49+00:00",
"cve": "CVE-2025-40035",
"id": "CVE-2025-40035",
"initial_release_date": "2025-10-28T00:00:00+00:00",
"product_status:known_affected": "274",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "kernel: Input: uinput - zero-initialize uinput_ff_upload_compat to avoid info leak",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-40035.json",
"version": "3"
}
}
}
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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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