CVE-2026-23178
Full vulnerability record from the local CVENow database.
Description
In the Linux kernel, the following vulnerability has been resolved: HID: i2c-hid: fix potential buffer overflow in i2c_hid_get_report() `i2c_hid_xfer` is used to read `recv_len + sizeof(__le16)` bytes of data into `ihid->rawbuf`. The former can come from the userspace in the hidraw driver and is only bounded by HID_MAX_BUFFER_SIZE(16384) by default (unless we also set `max_buffer_size` field of `struct hid_ll_driver` which we do not). The latter has size determined at runtime by the maximum size of different report types you could receive on any particular device and can be a much smaller value. Fix this by truncating `recv_len` to `ihid->bufsize - sizeof(__le16)`. The impact is low since access to hidraw devices requires root.
Severity
HIGH
CVSS score
7.8
(v3.1)
Vulnerability status
Deferred
Source identifier
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Published
2026-02-14 17:15:55.537000
Last modified
2026-10-19 19:17:40.423000
View original CVE JSON
{
"id": "CVE-2026-23178",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"published": "2026-02-14T17:15:55.537",
"lastModified": "2026-10-19T19:17:40.423",
"vulnStatus": "Deferred",
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nHID: i2c-hid: fix potential buffer overflow in i2c_hid_get_report()\n\n`i2c_hid_xfer` is used to read `recv_len + sizeof(__le16)` bytes of data\ninto `ihid->rawbuf`.\n\nThe former can come from the userspace in the hidraw driver and is only\nbounded by HID_MAX_BUFFER_SIZE(16384) by default (unless we also set\n`max_buffer_size` field of `struct hid_ll_driver` which we do not).\n\nThe latter has size determined at runtime by the maximum size of\ndifferent report types you could receive on any particular device and\ncan be a much smaller value.\n\nFix this by truncating `recv_len` to `ihid->bufsize - sizeof(__le16)`.\n\nThe impact is low since access to hidraw devices requires root."
},
{
"lang": "es",
"value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nHID: i2c-hid: corrige un potencial desbordamiento de búfer en i2c_hid_get_report()\n\n'i2c_hid_xfer' se utiliza para leer 'recv_len + sizeof(__le16)' bytes de datos en 'ihid->rawbuf'.\n\nEl primero puede provenir del espacio de usuario en el controlador hidraw y está limitado únicamente por HID_MAX_BUFFER_SIZE(16384) por defecto (a menos que también configuremos el campo 'max_buffer_size' de 'struct hid_ll_driver', lo cual no hacemos).\n\nEl segundo tiene un tamaño determinado en tiempo de ejecución por el tamaño máximo de los diferentes tipos de informes que se podrían recibir en cualquier dispositivo particular y puede ser un valor mucho menor.\n\nEsto se soluciona truncando 'recv_len' a 'ihid->bufsize - sizeof(__le16)'.\n\nEl impacto es bajo ya que el acceso a los dispositivos hidraw requiere root."
}
],
"affected": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"affectedData": [
{
"vendor": "Linux",
"product": "Linux",
"defaultStatus": "unaffected",
"programFiles": [
"drivers/hid/i2c-hid/i2c-hid-core.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"versions": [
{
"version": "85df713377ddc0482071c3e6b64c37bd1e48f1f1",
"lessThan": "f9c9ad89d845f88a1509e9d672f65d234425fde9",
"versionType": "git",
"status": "affected"
},
{
"version": "85df713377ddc0482071c3e6b64c37bd1e48f1f1",
"lessThan": "cff3f619fd1cb40cdd89971df9001f075613d219",
"versionType": "git",
"status": "affected"
},
{
"version": "85df713377ddc0482071c3e6b64c37bd1e48f1f1",
"lessThan": "786ec171788bdf9dda38789163f1b1fbb47f2d1e",
"versionType": "git",
"status": "affected"
},
{
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"versionType": "git",
"status": "affected"
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{
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"versionType": "git",
"status": "affected"
}
]
},
{
"vendor": "Linux",
"product": "Linux",
"defaultStatus": "affected",
"programFiles": [
"drivers/hid/i2c-hid/i2c-hid-core.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"versions": [
{
"version": "5.18",
"status": "affected"
},
{
"version": "0",
"lessThan": "5.18",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.1.163",
"lessThanOrEqual": "6.1.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.6.124",
"lessThanOrEqual": "6.6.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.12.70",
"lessThanOrEqual": "6.12.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.18.10",
"lessThanOrEqual": "6.18.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.19",
"lessThanOrEqual": "*",
"versionType": "original_commit_for_fix",
"status": "unaffected"
}
]
}
]
}
],
"metrics": {
"cvssMetricV31": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"type": "Secondary",
"cvssData": {
"version": "3.1",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"baseScore": 7.8,
"baseSeverity": "HIGH",
"attackVector": "LOCAL",
"attackComplexity": "LOW",
"privilegesRequired": "LOW",
"userInteraction": "NONE",
"scope": "UNCHANGED",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"availabilityImpact": "HIGH"
},
"exploitabilityScore": 1.8,
"impactScore": 5.9
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"timestamp": "2026-10-16T15:06:40.043320Z",
"id": "CVE-2026-23178",
"options": [
{
"exploitation": "none"
},
{
"automatable": "no"
},
{
"technicalImpact": "total"
}
],
"role": "CISA Coordinator",
"version": "2.0.3"
}
}
]
},
"weaknesses": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"type": "Secondary",
"description": [
{
"lang": "en",
"value": "CWE-122"
}
]
}
],
"references": [
{
"url": "https://git.kernel.org/stable/c/2124279f1f8c32c1646ce98e75a1a39b23b7db76",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/2497ff38c530b1af0df5130ca9f5ab22c5e92f29",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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{
"url": "https://git.kernel.org/stable/c/786ec171788bdf9dda38789163f1b1fbb47f2d1e",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/cff3f619fd1cb40cdd89971df9001f075613d219",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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{
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"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
]
}