CVE-2026-68366 (GCVE-0-2026-68366)
Vulnerability from cvelistv5 – Published: 2026-08-10 12:03 – Updated: 2026-08-19 16:34
VLAI
EPSS
VEX
Title
usb: gadget: uvc: clamp SEND_RESPONSE length to the response buffer
Summary
In the Linux kernel, the following vulnerability has been resolved:
usb: gadget: uvc: clamp SEND_RESPONSE length to the response buffer
uvc_send_response() builds the UVC control response from a user-supplied
struct uvc_request_data:
req->length = min_t(unsigned int, uvc->event_length, data->length);
...
memcpy(req->buf, data->data, req->length);
req->length is clamped to uvc->event_length, which is taken from the
host control request wLength (up to UVC_MAX_REQUEST_SIZE, 64), and to
data->length, which comes from the UVCIOC_SEND_RESPONSE ioctl and is
only checked for being negative. The source buffer data->data is only
60 bytes, so a response with uvc->event_length and data->length both
greater than 60 makes memcpy() read past the end of data->data.
Clamp req->length to sizeof(data->data) as well.
Severity
No CVSS data available.
Assigner
References
8 references
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
a5eaaa1f33e771fa1651a4a7652b8a5f9fa7f6c1 , < eaf783c005299a702f2cc96b08cd21ede081f098
(git)
Affected: a5eaaa1f33e771fa1651a4a7652b8a5f9fa7f6c1 , < 568e68d8f80395a64848aa2946af8ade72da0ffb (git) Affected: a5eaaa1f33e771fa1651a4a7652b8a5f9fa7f6c1 , < 82ec2c1e456b17451f0736c3983402642f961733 (git) Affected: a5eaaa1f33e771fa1651a4a7652b8a5f9fa7f6c1 , < 4e116372b7a4f87df0dc0ed4b0ab5b0bb0cc5796 (git) Affected: a5eaaa1f33e771fa1651a4a7652b8a5f9fa7f6c1 , < 662f6c6c6ff8a6c508e1646c09cae74e28f3cca6 (git) Affected: a5eaaa1f33e771fa1651a4a7652b8a5f9fa7f6c1 , < 1f03658f3e9b2f8fd1d1003ba389a0390b49a350 (git) Affected: a5eaaa1f33e771fa1651a4a7652b8a5f9fa7f6c1 , < c8510fbbea09ef0170b56b14dc2b5890dc75be07 (git) Affected: a5eaaa1f33e771fa1651a4a7652b8a5f9fa7f6c1 , < b70dc75e85ba968b7b76eebfe5d63000080b875b (git) |
|
| Linux | Linux |
Affected:
3.10
Unaffected: 0 , < 3.10 (semver) Unaffected: 5.10.265 , ≤ 5.10.* (semver) Unaffected: 5.15.216 , ≤ 5.15.* (semver) Unaffected: 6.1.183 , ≤ 6.1.* (semver) Unaffected: 6.6.148 , ≤ 6.6.* (semver) Unaffected: 6.12.101 , ≤ 6.12.* (semver) Unaffected: 6.18.42 , ≤ 6.18.* (semver) Unaffected: 7.1.6 , ≤ 7.1.* (semver) Unaffected: 7.2 , ≤ * (original_commit_for_fix) |
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{
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{
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"version": "7.1.6",
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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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}
],
"negate": false,
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],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nusb: gadget: uvc: clamp SEND_RESPONSE length to the response buffer\n\nuvc_send_response() builds the UVC control response from a user-supplied\nstruct uvc_request_data:\n\n\treq-\u003elength = min_t(unsigned int, uvc-\u003eevent_length, data-\u003elength);\n\t...\n\tmemcpy(req-\u003ebuf, data-\u003edata, req-\u003elength);\n\nreq-\u003elength is clamped to uvc-\u003eevent_length, which is taken from the\nhost control request wLength (up to UVC_MAX_REQUEST_SIZE, 64), and to\ndata-\u003elength, which comes from the UVCIOC_SEND_RESPONSE ioctl and is\nonly checked for being negative. The source buffer data-\u003edata is only\n60 bytes, so a response with uvc-\u003eevent_length and data-\u003elength both\ngreater than 60 makes memcpy() read past the end of data-\u003edata.\n\nClamp req-\u003elength to sizeof(data-\u003edata) as well."
}
],
"providerMetadata": {
"dateUpdated": "2026-08-19T16:34:23.776Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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{
"url": "https://git.kernel.org/stable/c/568e68d8f80395a64848aa2946af8ade72da0ffb"
},
{
"url": "https://git.kernel.org/stable/c/82ec2c1e456b17451f0736c3983402642f961733"
},
{
"url": "https://git.kernel.org/stable/c/4e116372b7a4f87df0dc0ed4b0ab5b0bb0cc5796"
},
{
"url": "https://git.kernel.org/stable/c/662f6c6c6ff8a6c508e1646c09cae74e28f3cca6"
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},
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"url": "https://git.kernel.org/stable/c/b70dc75e85ba968b7b76eebfe5d63000080b875b"
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"title": "usb: gadget: uvc: clamp SEND_RESPONSE length to the response buffer",
"x_generator": {
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}
}
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"datePublished": "2026-08-10T12:03:43.304Z",
"dateReserved": "2026-07-30T09:28:09.385Z",
"dateUpdated": "2026-08-19T16:34:23.776Z",
"state": "PUBLISHED"
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"date": "2026-10-07",
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"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nusb: gadget: uvc: clamp SEND_RESPONSE length to the response buffer\n\nuvc_send_response() builds the UVC control response from a user-supplied\nstruct uvc_request_data:\n\n\treq-\u003elength = min_t(unsigned int, uvc-\u003eevent_length, data-\u003elength);\n\t...\n\tmemcpy(req-\u003ebuf, data-\u003edata, req-\u003elength);\n\nreq-\u003elength is clamped to uvc-\u003eevent_length, which is taken from the\nhost control request wLength (up to UVC_MAX_REQUEST_SIZE, 64), and to\ndata-\u003elength, which comes from the UVCIOC_SEND_RESPONSE ioctl and is\nonly checked for being negative. The source buffer data-\u003edata is only\n60 bytes, so a response with uvc-\u003eevent_length and data-\u003elength both\ngreater than 60 makes memcpy() read past the end of data-\u003edata.\n\nClamp req-\u003elength to sizeof(data-\u003edata) as well."
}
],
"id": "CVE-2026-68366",
"lastModified": "2026-08-19T17:20:46.203",
"metrics": {},
"published": "2026-08-10T13:20:29.230",
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"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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},
"redhat_vex": {
"aggregate_severity": "Moderate",
"current_release_date": "2026-08-31T11:23:40+00:00",
"cve": "CVE-2026-68366",
"id": "CVE-2026-68366",
"initial_release_date": "2026-08-10T00:00:00+00:00",
"product_status:known_affected": "1",
"product_status:known_not_affected": "276",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "kernel: usb: gadget: uvc: clamp SEND_RESPONSE length to the response buffer",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-68366.json",
"version": "3"
},
"suse_vex": {
"aggregate_severity": "moderate",
"current_release_date": "2026-10-03T00:32:58Z",
"cve": "CVE-2026-68366",
"id": "CVE-2026-68366",
"initial_release_date": "2026-08-14T17:13:53Z",
"product_status:known_affected": "673",
"product_status:known_not_affected": "60",
"product_status:recommended": "252",
"source": "SUSE CSAF VEX",
"status": "interim",
"title": "SUSE CVE CVE-2026-68366",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-68366.json",
"version": "11"
}
}
}
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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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