CVE-2026-63943 (GCVE-0-2026-63943)
Vulnerability from cvelistv5 – Published: 2026-07-19 14:55 – Updated: 2026-07-19 14:55
VLAI
EPSS
VEX
Title
Input: xpad - fix out-of-bounds access for Share button
Summary
In the Linux kernel, the following vulnerability has been resolved:
Input: xpad - fix out-of-bounds access for Share button
xpadone_process_packet() receives len directly from urb->actual_length
and uses it to index the share-button byte at data[len - 18] or
data[len - 26]. Since both len and data[0] are under the device's
control, a broken controller can send a GIP_CMD_INPUT packet with
actual_length < 18 (e.g. 5 bytes) and reach this code path, causing
accesses beyond the actual array.
Fix this by calculating the offset and checking bounds against the
packet length.
Severity
No CVSS data available.
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
cbc82e7db16d59c301457312a624a7de2c03cd4a , < bcfb4833cd4078a1a356ef451838b75cd233099e
(git)
Affected: 302a0cd0bbc450998429a3f4267970a4b93251a8 , < 37ec54abfdd63a63fd50734a9c4e4cbc1e5795af (git) Affected: 4ef46367073b107ec22f46fe5f12176e87c238e8 , < 9749db57233b396353ad5dee81eec9d9880c9246 (git) Affected: 4ef46367073b107ec22f46fe5f12176e87c238e8 , < 6346b0895b574ce45f3747b9c508c72f70e6abef (git) Affected: 4ef46367073b107ec22f46fe5f12176e87c238e8 , < 6cdc46b38cf146ce81d4831b6472dbf7731849a2 (git) Affected: a7e3ddd1d9a3d0b26465ed01d464e3c05479ebc8 (git) Affected: 6.6.91 , < 6.6.143 (semver) Affected: 6.12.29 , < 6.12.93 (semver) Affected: 6.14.7 , < 6.15 (semver) |
guessed | |
| Linux | Linux |
Affected:
6.15
Unaffected: 0 , < 6.15 (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/input/joystick/xpad.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"lessThan": "bcfb4833cd4078a1a356ef451838b75cd233099e",
"status": "affected",
"version": "cbc82e7db16d59c301457312a624a7de2c03cd4a",
"versionType": "git"
},
{
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"status": "affected",
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"versionType": "git"
},
{
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"status": "affected",
"version": "4ef46367073b107ec22f46fe5f12176e87c238e8",
"versionType": "git"
},
{
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"status": "affected",
"version": "4ef46367073b107ec22f46fe5f12176e87c238e8",
"versionType": "git"
},
{
"lessThan": "6cdc46b38cf146ce81d4831b6472dbf7731849a2",
"status": "affected",
"version": "4ef46367073b107ec22f46fe5f12176e87c238e8",
"versionType": "git"
},
{
"status": "affected",
"version": "a7e3ddd1d9a3d0b26465ed01d464e3c05479ebc8",
"versionType": "git"
},
{
"lessThan": "6.6.143",
"status": "affected",
"version": "6.6.91",
"versionType": "semver"
},
{
"lessThan": "6.12.93",
"status": "affected",
"version": "6.12.29",
"versionType": "semver"
},
{
"lessThan": "6.15",
"status": "affected",
"version": "6.14.7",
"versionType": "semver"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"drivers/input/joystick/xpad.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "6.15"
},
{
"lessThan": "6.15",
"status": "unaffected",
"version": "0",
"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": "6.6.143",
"versionStartIncluding": "6.6.91",
"vulnerable": true
},
{
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"versionEndExcluding": "6.12.93",
"versionStartIncluding": "6.12.29",
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},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "7.0.12",
"versionStartIncluding": "6.15",
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},
{
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"versionEndExcluding": "7.1",
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},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "6.14.7",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nInput: xpad - fix out-of-bounds access for Share button\n\nxpadone_process_packet() receives len directly from urb-\u003eactual_length\nand uses it to index the share-button byte at data[len - 18] or\ndata[len - 26]. Since both len and data[0] are under the device\u0027s\ncontrol, a broken controller can send a GIP_CMD_INPUT packet with\nactual_length \u003c 18 (e.g. 5 bytes) and reach this code path, causing\naccesses beyond the actual array.\n\nFix this by calculating the offset and checking bounds against the\npacket length."
}
],
"providerMetadata": {
"dateUpdated": "2026-07-19T14:55:38.411Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/bcfb4833cd4078a1a356ef451838b75cd233099e"
},
{
"url": "https://git.kernel.org/stable/c/37ec54abfdd63a63fd50734a9c4e4cbc1e5795af"
},
{
"url": "https://git.kernel.org/stable/c/9749db57233b396353ad5dee81eec9d9880c9246"
},
{
"url": "https://git.kernel.org/stable/c/6346b0895b574ce45f3747b9c508c72f70e6abef"
},
{
"url": "https://git.kernel.org/stable/c/6cdc46b38cf146ce81d4831b6472dbf7731849a2"
}
],
"title": "Input: xpad - fix out-of-bounds access for Share button",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2026-63943",
"datePublished": "2026-07-19T14:55:38.411Z",
"dateReserved": "2026-07-19T07:54:57.022Z",
"dateUpdated": "2026-07-19T14:55:38.411Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2026-63943",
"date": "2026-10-04",
"epss": "0.00209",
"percentile": "0.09948"
},
"nvd": {
"cve": {
"affected": [
{
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{
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"product": "Linux",
"programFiles": [
"drivers/input/joystick/xpad.c"
],
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"vendor": "Linux",
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},
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"versionType": "git"
},
{
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"versionType": "git"
},
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},
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"status": "affected",
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"versionType": "semver"
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},
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],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "6.15"
},
{
"lessThan": "6.15",
"status": "unaffected",
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"versionType": "semver"
},
{
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"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\nInput: xpad - fix out-of-bounds access for Share button\n\nxpadone_process_packet() receives len directly from urb-\u003eactual_length\nand uses it to index the share-button byte at data[len - 18] or\ndata[len - 26]. Since both len and data[0] are under the device\u0027s\ncontrol, a broken controller can send a GIP_CMD_INPUT packet with\nactual_length \u003c 18 (e.g. 5 bytes) and reach this code path, causing\naccesses beyond the actual array.\n\nFix this by calculating the offset and checking bounds against the\npacket length."
}
],
"id": "CVE-2026-63943",
"lastModified": "2026-07-27T17:44:23.777",
"metrics": {},
"published": "2026-07-19T16:17:12.880",
"references": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/37ec54abfdd63a63fd50734a9c4e4cbc1e5795af"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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{
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}
],
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"vulnStatus": "Awaiting Analysis"
}
},
"redhat_vex": {
"aggregate_severity": "Moderate",
"current_release_date": "2026-07-21T22:10:48+00:00",
"cve": "CVE-2026-63943",
"id": "CVE-2026-63943",
"initial_release_date": "2026-07-19T00:00:00+00:00",
"product_status:known_not_affected": "274",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "kernel: Input: xpad - fix out-of-bounds access for Share button",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-63943.json",
"version": "3"
},
"suse_vex": {
"aggregate_severity": "moderate",
"current_release_date": "2026-10-01T00:47:56Z",
"cve": "CVE-2026-63943",
"id": "CVE-2026-63943",
"initial_release_date": "2026-07-21T13:03:02Z",
"product_status:known_affected": "426",
"product_status:known_not_affected": "314",
"product_status:recommended": "250",
"source": "SUSE CSAF VEX",
"status": "interim",
"title": "SUSE CVE CVE-2026-63943",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-63943.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
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