CVE-2026-63904 (GCVE-0-2026-63904)
Vulnerability from cvelistv5 – Published: 2026-07-19 14:55 – Updated: 2026-07-19 14:55
VLAI
EPSS
VEX
Title
usb: usbtmc: check URB actual_length for interrupt-IN notifications
Summary
In the Linux kernel, the following vulnerability has been resolved:
usb: usbtmc: check URB actual_length for interrupt-IN notifications
USBTMC devices can use an optional interrupt endpoint for notification
messages. These typically contain two-byte headers indicating the
payload format, but the driver does not check if these headers are
present before accessing the data buffers. In cases where the URB
actual_length is not enough to fit these headers, the driver will either
cause an out-of-bounds read, or consume stale leftover data from a
previous notification.
Fix by checking if actual_data contains enough bytes for the headers,
otherwise resubmit URB to the interrupt endpoint.
Severity
No CVSS data available.
Assigner
References
8 references
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
dbf3e7f654c0f06a932b8fcafac78de9d0b81d68 , < e794bd67b3faf98af46f958897f6b91412c7d2a9
(git)
Affected: dbf3e7f654c0f06a932b8fcafac78de9d0b81d68 , < e3eec3005de44e7f37d8d7724be636446516ab42 (git) Affected: dbf3e7f654c0f06a932b8fcafac78de9d0b81d68 , < ae87f505917e703ae3b487d9663d78826ff43608 (git) Affected: dbf3e7f654c0f06a932b8fcafac78de9d0b81d68 , < 5de7df75ef3a2756b25fe3d582a4a2970444fe5a (git) Affected: dbf3e7f654c0f06a932b8fcafac78de9d0b81d68 , < 69020fa089f1bf0e1a10a15265f31b143a846409 (git) Affected: dbf3e7f654c0f06a932b8fcafac78de9d0b81d68 , < 75f6d3da2cc646983f41807ef98851569c12bca9 (git) Affected: dbf3e7f654c0f06a932b8fcafac78de9d0b81d68 , < f141b01eaa58ac7e323931d670318aa247bff087 (git) Affected: dbf3e7f654c0f06a932b8fcafac78de9d0b81d68 , < 52f2ad3f7e5eb3b5908e1d685d4342519dc9cfcd (git) |
guessed | |
| Linux | Linux |
Affected:
4.6
Unaffected: 0 , < 4.6 (semver) Unaffected: 5.10.259 , ≤ 5.10.* (semver) Unaffected: 5.15.210 , ≤ 5.15.* (semver) Unaffected: 6.1.176 , ≤ 6.1.* (semver) Unaffected: 6.6.143 , ≤ 6.6.* (semver) Unaffected: 6.12.93 , ≤ 6.12.* (semver) Unaffected: 6.18.35 , ≤ 6.18.* (semver) Unaffected: 7.0.12 , ≤ 7.0.* (semver) Unaffected: 7.1 , ≤ * (original_commit_for_fix) |
guessed |
{
"containers": {
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"drivers/usb/class/usbtmc.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
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"versionType": "git"
},
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},
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"versionType": "git"
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"status": "affected",
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"versionType": "git"
},
{
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"status": "affected",
"version": "dbf3e7f654c0f06a932b8fcafac78de9d0b81d68",
"versionType": "git"
},
{
"lessThan": "f141b01eaa58ac7e323931d670318aa247bff087",
"status": "affected",
"version": "dbf3e7f654c0f06a932b8fcafac78de9d0b81d68",
"versionType": "git"
},
{
"lessThan": "52f2ad3f7e5eb3b5908e1d685d4342519dc9cfcd",
"status": "affected",
"version": "dbf3e7f654c0f06a932b8fcafac78de9d0b81d68",
"versionType": "git"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"drivers/usb/class/usbtmc.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "4.6"
},
{
"lessThan": "4.6",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"version": "5.10.259",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"version": "5.15.210",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"version": "6.1.176",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"version": "6.6.143",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"version": "6.12.93",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.18.*",
"status": "unaffected",
"version": "6.18.35",
"versionType": "semver"
},
{
"lessThanOrEqual": "7.0.*",
"status": "unaffected",
"version": "7.0.12",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "7.1",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.10.259",
"versionStartIncluding": "4.6",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.15.210",
"versionStartIncluding": "4.6",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.1.176",
"versionStartIncluding": "4.6",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.6.143",
"versionStartIncluding": "4.6",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.12.93",
"versionStartIncluding": "4.6",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.18.35",
"versionStartIncluding": "4.6",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "7.0.12",
"versionStartIncluding": "4.6",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "7.1",
"versionStartIncluding": "4.6",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nusb: usbtmc: check URB actual_length for interrupt-IN notifications\n\nUSBTMC devices can use an optional interrupt endpoint for notification\nmessages. These typically contain two-byte headers indicating the\npayload format, but the driver does not check if these headers are\npresent before accessing the data buffers. In cases where the URB\nactual_length is not enough to fit these headers, the driver will either\ncause an out-of-bounds read, or consume stale leftover data from a\nprevious notification.\n\nFix by checking if actual_data contains enough bytes for the headers,\notherwise resubmit URB to the interrupt endpoint."
}
],
"providerMetadata": {
"dateUpdated": "2026-07-19T14:55:11.547Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/e794bd67b3faf98af46f958897f6b91412c7d2a9"
},
{
"url": "https://git.kernel.org/stable/c/e3eec3005de44e7f37d8d7724be636446516ab42"
},
{
"url": "https://git.kernel.org/stable/c/ae87f505917e703ae3b487d9663d78826ff43608"
},
{
"url": "https://git.kernel.org/stable/c/5de7df75ef3a2756b25fe3d582a4a2970444fe5a"
},
{
"url": "https://git.kernel.org/stable/c/69020fa089f1bf0e1a10a15265f31b143a846409"
},
{
"url": "https://git.kernel.org/stable/c/75f6d3da2cc646983f41807ef98851569c12bca9"
},
{
"url": "https://git.kernel.org/stable/c/f141b01eaa58ac7e323931d670318aa247bff087"
},
{
"url": "https://git.kernel.org/stable/c/52f2ad3f7e5eb3b5908e1d685d4342519dc9cfcd"
}
],
"title": "usb: usbtmc: check URB actual_length for interrupt-IN notifications",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2026-63904",
"datePublished": "2026-07-19T14:55:11.547Z",
"dateReserved": "2026-07-19T07:54:57.019Z",
"dateUpdated": "2026-07-19T14:55:11.547Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2026-63904",
"date": "2026-10-01",
"epss": "0.0022",
"percentile": "0.11237"
},
"nvd": {
"cve": {
"affected": [
{
"affectedData": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"drivers/usb/class/usbtmc.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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"versionType": "git"
},
{
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"versionType": "git"
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"versionType": "git"
},
{
"lessThan": "f141b01eaa58ac7e323931d670318aa247bff087",
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"version": "dbf3e7f654c0f06a932b8fcafac78de9d0b81d68",
"versionType": "git"
},
{
"lessThan": "52f2ad3f7e5eb3b5908e1d685d4342519dc9cfcd",
"status": "affected",
"version": "dbf3e7f654c0f06a932b8fcafac78de9d0b81d68",
"versionType": "git"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"drivers/usb/class/usbtmc.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "4.6"
},
{
"lessThan": "4.6",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"version": "5.10.259",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"version": "5.15.210",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"version": "6.1.176",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"version": "6.6.143",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"version": "6.12.93",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.18.*",
"status": "unaffected",
"version": "6.18.35",
"versionType": "semver"
},
{
"lessThanOrEqual": "7.0.*",
"status": "unaffected",
"version": "7.0.12",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "7.1",
"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\nusb: usbtmc: check URB actual_length for interrupt-IN notifications\n\nUSBTMC devices can use an optional interrupt endpoint for notification\nmessages. These typically contain two-byte headers indicating the\npayload format, but the driver does not check if these headers are\npresent before accessing the data buffers. In cases where the URB\nactual_length is not enough to fit these headers, the driver will either\ncause an out-of-bounds read, or consume stale leftover data from a\nprevious notification.\n\nFix by checking if actual_data contains enough bytes for the headers,\notherwise resubmit URB to the interrupt endpoint."
}
],
"id": "CVE-2026-63904",
"lastModified": "2026-07-27T17:44:23.777",
"metrics": {},
"published": "2026-07-19T16:17:08.130",
"references": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/52f2ad3f7e5eb3b5908e1d685d4342519dc9cfcd"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/5de7df75ef3a2756b25fe3d582a4a2970444fe5a"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/69020fa089f1bf0e1a10a15265f31b143a846409"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/75f6d3da2cc646983f41807ef98851569c12bca9"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/ae87f505917e703ae3b487d9663d78826ff43608"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/e3eec3005de44e7f37d8d7724be636446516ab42"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/e794bd67b3faf98af46f958897f6b91412c7d2a9"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/f141b01eaa58ac7e323931d670318aa247bff087"
}
],
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"vulnStatus": "Awaiting Analysis"
}
},
"redhat_vex": {
"aggregate_severity": "Moderate",
"current_release_date": "2026-08-07T12:48:30+00:00",
"cve": "CVE-2026-63904",
"id": "CVE-2026-63904",
"initial_release_date": "2026-07-19T00:00:00+00:00",
"product_status:known_affected": "274",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "kernel: usb: usbtmc: check URB actual_length for interrupt-IN notifications",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-63904.json",
"version": "3"
},
"suse_vex": {
"aggregate_severity": "moderate",
"current_release_date": "2026-10-01T00:48:53Z",
"cve": "CVE-2026-63904",
"id": "CVE-2026-63904",
"initial_release_date": "2026-07-21T13:03:53Z",
"product_status:known_affected": "675",
"product_status:known_not_affected": "48",
"product_status:recommended": "250",
"source": "SUSE CSAF VEX",
"status": "interim",
"title": "SUSE CVE CVE-2026-63904",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-63904.json",
"version": "12"
}
}
}
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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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