CVE-2026-93119 (GCVE-0-2026-93119)
Vulnerability from cvelistv5 – Published: 2026-09-17 16:11 – Updated: 2026-09-17 16:11
VLAI
EPSS
VEX
Title
usb: ljca: bound bank_num in ljca_enumerate_gpio()
Summary
In the Linux kernel, the following vulnerability has been resolved:
usb: ljca: bound bank_num in ljca_enumerate_gpio()
ljca_enumerate_gpio() reads desc->bank_num from the device and loops
valid_pin[i] = get_unaligned_le32(...) for i < bank_num. valid_pin[]
holds only LJCA_MAX_GPIO_NUM / 32 = 2 entries.
Two checks run before the loop. The reply length must match
struct_size(desc, bank_desc, bank_num). The product
pins_per_bank * bank_num must not exceed LJCA_MAX_GPIO_NUM. Neither one
bounds bank_num against the size of valid_pin[]. The reply is capped at
LJCA_MAX_PAYLOAD_SIZE (60) bytes, so the struct_size check limits
bank_num to 9. A device that reports bank_num 9 with pins_per_bank 7
still passes both checks. gpio_num is 63 and the reply is 56 bytes. The
loop then writes nine u32 into the two entry array and overruns
valid_pin[] on the stack.
A broken or malicious LJCA device can therefore overflow the stack.
Reject a bank_num that does not fit valid_pin[].
Severity
No CVSS data available.
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
acd6199f195d6de814ac4090ce0864a613b1580e , < 0069593170a3d177de793c9a0b36989c4f069111
(git)
Affected: acd6199f195d6de814ac4090ce0864a613b1580e , < aed958c4f784a29cf42abb3e54af51a16bddde46 (git) Affected: acd6199f195d6de814ac4090ce0864a613b1580e , < 9c4bc8f7426aa001387800bf0140bfc5087a6de3 (git) Affected: acd6199f195d6de814ac4090ce0864a613b1580e , < dd9483726d0f16c1a56879c3edb65128259a4e2b (git) |
guessed | |
| Linux | Linux |
Affected:
6.7
Unaffected: 0 , < 6.7 (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": {
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"drivers/usb/misc/usb-ljca.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"lessThan": "0069593170a3d177de793c9a0b36989c4f069111",
"status": "affected",
"version": "acd6199f195d6de814ac4090ce0864a613b1580e",
"versionType": "git"
},
{
"lessThan": "aed958c4f784a29cf42abb3e54af51a16bddde46",
"status": "affected",
"version": "acd6199f195d6de814ac4090ce0864a613b1580e",
"versionType": "git"
},
{
"lessThan": "9c4bc8f7426aa001387800bf0140bfc5087a6de3",
"status": "affected",
"version": "acd6199f195d6de814ac4090ce0864a613b1580e",
"versionType": "git"
},
{
"lessThan": "dd9483726d0f16c1a56879c3edb65128259a4e2b",
"status": "affected",
"version": "acd6199f195d6de814ac4090ce0864a613b1580e",
"versionType": "git"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"drivers/usb/misc/usb-ljca.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "6.7"
},
{
"lessThan": "6.7",
"status": "unaffected",
"version": "0",
"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"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.12.110",
"versionStartIncluding": "6.7",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.18.52",
"versionStartIncluding": "6.7",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "7.2.6",
"versionStartIncluding": "6.7",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "7.3-rc1",
"versionStartIncluding": "6.7",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nusb: ljca: bound bank_num in ljca_enumerate_gpio()\n\nljca_enumerate_gpio() reads desc-\u003ebank_num from the device and loops\nvalid_pin[i] = get_unaligned_le32(...) for i \u003c bank_num. valid_pin[]\nholds only LJCA_MAX_GPIO_NUM / 32 = 2 entries.\n\nTwo checks run before the loop. The reply length must match\nstruct_size(desc, bank_desc, bank_num). The product\npins_per_bank * bank_num must not exceed LJCA_MAX_GPIO_NUM. Neither one\nbounds bank_num against the size of valid_pin[]. The reply is capped at\nLJCA_MAX_PAYLOAD_SIZE (60) bytes, so the struct_size check limits\nbank_num to 9. A device that reports bank_num 9 with pins_per_bank 7\nstill passes both checks. gpio_num is 63 and the reply is 56 bytes. The\nloop then writes nine u32 into the two entry array and overruns\nvalid_pin[] on the stack.\n\nA broken or malicious LJCA device can therefore overflow the stack.\nReject a bank_num that does not fit valid_pin[]."
}
],
"providerMetadata": {
"dateUpdated": "2026-09-17T16:11:25.867Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/0069593170a3d177de793c9a0b36989c4f069111"
},
{
"url": "https://git.kernel.org/stable/c/aed958c4f784a29cf42abb3e54af51a16bddde46"
},
{
"url": "https://git.kernel.org/stable/c/9c4bc8f7426aa001387800bf0140bfc5087a6de3"
},
{
"url": "https://git.kernel.org/stable/c/dd9483726d0f16c1a56879c3edb65128259a4e2b"
}
],
"title": "usb: ljca: bound bank_num in ljca_enumerate_gpio()",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2026-93119",
"datePublished": "2026-09-17T16:11:25.867Z",
"dateReserved": "2026-09-17T16:02:15.086Z",
"dateUpdated": "2026-09-17T16:11:25.867Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"nvd": {
"cve": {
"affected": [
{
"affectedData": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"drivers/usb/misc/usb-ljca.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"lessThan": "0069593170a3d177de793c9a0b36989c4f069111",
"status": "affected",
"version": "acd6199f195d6de814ac4090ce0864a613b1580e",
"versionType": "git"
},
{
"lessThan": "aed958c4f784a29cf42abb3e54af51a16bddde46",
"status": "affected",
"version": "acd6199f195d6de814ac4090ce0864a613b1580e",
"versionType": "git"
},
{
"lessThan": "9c4bc8f7426aa001387800bf0140bfc5087a6de3",
"status": "affected",
"version": "acd6199f195d6de814ac4090ce0864a613b1580e",
"versionType": "git"
},
{
"lessThan": "dd9483726d0f16c1a56879c3edb65128259a4e2b",
"status": "affected",
"version": "acd6199f195d6de814ac4090ce0864a613b1580e",
"versionType": "git"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"drivers/usb/misc/usb-ljca.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "6.7"
},
{
"lessThan": "6.7",
"status": "unaffected",
"version": "0",
"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\nusb: ljca: bound bank_num in ljca_enumerate_gpio()\n\nljca_enumerate_gpio() reads desc-\u003ebank_num from the device and loops\nvalid_pin[i] = get_unaligned_le32(...) for i \u003c bank_num. valid_pin[]\nholds only LJCA_MAX_GPIO_NUM / 32 = 2 entries.\n\nTwo checks run before the loop. The reply length must match\nstruct_size(desc, bank_desc, bank_num). The product\npins_per_bank * bank_num must not exceed LJCA_MAX_GPIO_NUM. Neither one\nbounds bank_num against the size of valid_pin[]. The reply is capped at\nLJCA_MAX_PAYLOAD_SIZE (60) bytes, so the struct_size check limits\nbank_num to 9. A device that reports bank_num 9 with pins_per_bank 7\nstill passes both checks. gpio_num is 63 and the reply is 56 bytes. The\nloop then writes nine u32 into the two entry array and overruns\nvalid_pin[] on the stack.\n\nA broken or malicious LJCA device can therefore overflow the stack.\nReject a bank_num that does not fit valid_pin[]."
}
],
"id": "CVE-2026-93119",
"lastModified": "2026-09-17T17:18:06.553",
"metrics": {},
"published": "2026-09-17T17:18:06.553",
"references": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/0069593170a3d177de793c9a0b36989c4f069111"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/9c4bc8f7426aa001387800bf0140bfc5087a6de3"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/aed958c4f784a29cf42abb3e54af51a16bddde46"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/dd9483726d0f16c1a56879c3edb65128259a4e2b"
}
],
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"vulnStatus": "Received"
}
}
}
}
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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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