CVE-2022-50131 (GCVE-0-2022-50131)
Vulnerability from cvelistv5 – Published: 2025-06-18 11:02 – Updated: 2026-08-05 08:57
VLAI
EPSS
VEX
Title
HID: mcp2221: prevent a buffer overflow in mcp_smbus_write()
Summary
In the Linux kernel, the following vulnerability has been resolved:
HID: mcp2221: prevent a buffer overflow in mcp_smbus_write()
Smatch Warning:
drivers/hid/hid-mcp2221.c:388 mcp_smbus_write() error: __memcpy()
'&mcp->txbuf[5]' too small (59 vs 255)
drivers/hid/hid-mcp2221.c:388 mcp_smbus_write() error: __memcpy() 'buf'
too small (34 vs 255)
The 'len' variable can take a value between 0-255 as it can come from
data->block[0] and it is user data. So add an bound check to prevent a
buffer overflow in memcpy().
Severity
7.8 (High)
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
67a95c21463d066060b0f66d65a75d45bb386ffb , < 66c8e816f2f2ca4a61b406503bd10bad1b35f72f
(git)
Affected: 67a95c21463d066060b0f66d65a75d45bb386ffb , < 91443c669d280937968f0aa4edefa741cfe35314 (git) Affected: 67a95c21463d066060b0f66d65a75d45bb386ffb , < 6402116a7b5ec80fa40fd145a80c813019cd555f (git) Affected: 67a95c21463d066060b0f66d65a75d45bb386ffb , < 3c0f8a59f2cc8841ee6653399a77f4f3e6e9a270 (git) Affected: 67a95c21463d066060b0f66d65a75d45bb386ffb , < 62ac2473553a00229e67bdf3cb023b62cf7f5a9a (git) |
guessed | |
| Linux | Linux |
Affected:
5.7
Unaffected: 0 , < 5.7 (semver) Unaffected: 5.10.137 , ≤ 5.10.* (semver) Unaffected: 5.15.61 , ≤ 5.15.* (semver) Unaffected: 5.18.18 , ≤ 5.18.* (semver) Unaffected: 5.19.2 , ≤ 5.19.* (semver) Unaffected: 6.0 , ≤ * (original_commit_for_fix) |
guessed |
{
"containers": {
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"drivers/hid/hid-mcp2221.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"lessThan": "66c8e816f2f2ca4a61b406503bd10bad1b35f72f",
"status": "affected",
"version": "67a95c21463d066060b0f66d65a75d45bb386ffb",
"versionType": "git"
},
{
"lessThan": "91443c669d280937968f0aa4edefa741cfe35314",
"status": "affected",
"version": "67a95c21463d066060b0f66d65a75d45bb386ffb",
"versionType": "git"
},
{
"lessThan": "6402116a7b5ec80fa40fd145a80c813019cd555f",
"status": "affected",
"version": "67a95c21463d066060b0f66d65a75d45bb386ffb",
"versionType": "git"
},
{
"lessThan": "3c0f8a59f2cc8841ee6653399a77f4f3e6e9a270",
"status": "affected",
"version": "67a95c21463d066060b0f66d65a75d45bb386ffb",
"versionType": "git"
},
{
"lessThan": "62ac2473553a00229e67bdf3cb023b62cf7f5a9a",
"status": "affected",
"version": "67a95c21463d066060b0f66d65a75d45bb386ffb",
"versionType": "git"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"drivers/hid/hid-mcp2221.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "5.7"
},
{
"lessThan": "5.7",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"version": "5.10.137",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"version": "5.15.61",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.18.*",
"status": "unaffected",
"version": "5.18.18",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.19.*",
"status": "unaffected",
"version": "5.19.2",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "6.0",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.10.137",
"versionStartIncluding": "5.7",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.15.61",
"versionStartIncluding": "5.7",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.18.18",
"versionStartIncluding": "5.7",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.19.2",
"versionStartIncluding": "5.7",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.0",
"versionStartIncluding": "5.7",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nHID: mcp2221: prevent a buffer overflow in mcp_smbus_write()\n\nSmatch Warning:\ndrivers/hid/hid-mcp2221.c:388 mcp_smbus_write() error: __memcpy()\n\u0027\u0026mcp-\u003etxbuf[5]\u0027 too small (59 vs 255)\ndrivers/hid/hid-mcp2221.c:388 mcp_smbus_write() error: __memcpy() \u0027buf\u0027\ntoo small (34 vs 255)\n\nThe \u0027len\u0027 variable can take a value between 0-255 as it can come from\ndata-\u003eblock[0] and it is user data. So add an bound check to prevent a\nbuffer overflow in memcpy()."
}
],
"metrics": [
{
"cvssV3_1": {
"baseScore": 7.8,
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
"scenarios": [
{
"lang": "en",
"value": "AV:L - The overflow is reached via the local i2c-dev I2C_SMBUS ioctl into mcp_smbus_xfer()/mcp_smbus_write(), not by crafted USB HID reports. An attached MCP2221 is a deployment precondition; the attack is a local syscall against /dev/i2c-N.\nAC:L - An attacker who can open the adapter sets data-\u003eblock[0] above I2C_SMBUS_BLOCK_MAX and triggers memcpy into txbuf[64] on the write path before any USB/I2C slave response, so no race or external state is required.\nPR:L - i2cdev_open() has no capability check; access depends on /dev/i2c-* permissions (commonly 0660 root:i2c or equivalent on embedded/industrial systems), which is basic local access rather than real root.\nUI:N - Exploitation needs only ioctl(I2C_SMBUS) with an oversized block write (I2C_SMBUS_BLOCK_DATA / I2C_SMBUS_I2C_BLOCK_DATA / BLOCK_PROC_CALL); no victim interaction is required.\nS:U - This is ordinary host-kernel heap memory corruption (local privilege escalation/DoS) with no VM escape, IOMMU bypass, or other cross-authority impact.\nC:H - Oversized memcpy into mcp-\u003etxbuf overflows the heap-allocated struct mcp2221 and adjacent heap, a memory-corruption primitive that can be leveraged for information disclosure.\nI:H - Out-of-bounds heap write of up to ~196 bytes past txbuf (controlled length from data-\u003eblock[0]) can corrupt adjacent state including pointers (e.g. gc) and enable integrity compromise/control-flow hijacking.\nA:H - The same heap corruption can oops or panic the kernel even when not fully exploited for code execution."
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-08-05T08:57:29.234Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/66c8e816f2f2ca4a61b406503bd10bad1b35f72f"
},
{
"url": "https://git.kernel.org/stable/c/91443c669d280937968f0aa4edefa741cfe35314"
},
{
"url": "https://git.kernel.org/stable/c/6402116a7b5ec80fa40fd145a80c813019cd555f"
},
{
"url": "https://git.kernel.org/stable/c/3c0f8a59f2cc8841ee6653399a77f4f3e6e9a270"
},
{
"url": "https://git.kernel.org/stable/c/62ac2473553a00229e67bdf3cb023b62cf7f5a9a"
}
],
"title": "HID: mcp2221: prevent a buffer overflow in mcp_smbus_write()",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2022-50131",
"datePublished": "2025-06-18T11:02:56.796Z",
"dateReserved": "2025-06-18T10:57:27.418Z",
"dateUpdated": "2026-08-05T08:57:29.234Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2022-50131",
"date": "2026-10-01",
"epss": "0.00221",
"percentile": "0.11489"
},
"nvd": {
"cve": {
"affected": [
{
"affectedData": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"drivers/hid/hid-mcp2221.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"lessThan": "66c8e816f2f2ca4a61b406503bd10bad1b35f72f",
"status": "affected",
"version": "67a95c21463d066060b0f66d65a75d45bb386ffb",
"versionType": "git"
},
{
"lessThan": "91443c669d280937968f0aa4edefa741cfe35314",
"status": "affected",
"version": "67a95c21463d066060b0f66d65a75d45bb386ffb",
"versionType": "git"
},
{
"lessThan": "6402116a7b5ec80fa40fd145a80c813019cd555f",
"status": "affected",
"version": "67a95c21463d066060b0f66d65a75d45bb386ffb",
"versionType": "git"
},
{
"lessThan": "3c0f8a59f2cc8841ee6653399a77f4f3e6e9a270",
"status": "affected",
"version": "67a95c21463d066060b0f66d65a75d45bb386ffb",
"versionType": "git"
},
{
"lessThan": "62ac2473553a00229e67bdf3cb023b62cf7f5a9a",
"status": "affected",
"version": "67a95c21463d066060b0f66d65a75d45bb386ffb",
"versionType": "git"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"drivers/hid/hid-mcp2221.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "5.7"
},
{
"lessThan": "5.7",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"version": "5.10.137",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"version": "5.15.61",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.18.*",
"status": "unaffected",
"version": "5.18.18",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.19.*",
"status": "unaffected",
"version": "5.19.2",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "6.0",
"versionType": "original_commit_for_fix"
}
]
}
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
],
"configurations": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"matchCriteriaId": "674AABE4-BC3E-4530-9717-5DFE7AB70A3F",
"versionEndExcluding": "5.10.137",
"versionStartIncluding": "5.7",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"matchCriteriaId": "51861563-7F40-460F-82CD-2D3FBDAD6618",
"versionEndExcluding": "5.15.61",
"versionStartIncluding": "5.11",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"matchCriteriaId": "5B42E453-8837-49D0-A5EF-03F818A6DC11",
"versionEndExcluding": "5.18.18",
"versionStartIncluding": "5.16",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"matchCriteriaId": "A1A2A5A5-4598-4D7E-BA07-4660398D6C8F",
"versionEndExcluding": "5.19.2",
"versionStartIncluding": "5.19",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nHID: mcp2221: prevent a buffer overflow in mcp_smbus_write()\n\nSmatch Warning:\ndrivers/hid/hid-mcp2221.c:388 mcp_smbus_write() error: __memcpy()\n\u0027\u0026mcp-\u003etxbuf[5]\u0027 too small (59 vs 255)\ndrivers/hid/hid-mcp2221.c:388 mcp_smbus_write() error: __memcpy() \u0027buf\u0027\ntoo small (34 vs 255)\n\nThe \u0027len\u0027 variable can take a value between 0-255 as it can come from\ndata-\u003eblock[0] and it is user data. So add an bound check to prevent a\nbuffer overflow in memcpy()."
},
{
"lang": "es",
"value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: HID: mcp2221: evitar un desbordamiento de b\u00fafer en mcp_smbus_write() Advertencia de Smatch: drivers/hid/hid-mcp2221.c:388 Error de mcp_smbus_write(): __memcpy() \u0027\u0026amp;mcp-\u0026gt;txbuf[5]\u0027 demasiado peque\u00f1o (59 frente a 255) drivers/hid/hid-mcp2221.c:388 Error de mcp_smbus_write(): __memcpy() \u0027buf\u0027 demasiado peque\u00f1o (34 frente a 255) La variable \u0027len\u0027 puede tomar un valor entre 0 y 255, ya que puede provenir de data-\u0026gt;block[0] y son datos de usuario. Por lo tanto, agregue una comprobaci\u00f3n de l\u00edmite para evitar un desbordamiento de b\u00fafer en memcpy()."
}
],
"id": "CVE-2022-50131",
"lastModified": "2026-08-04T10:18:05.643",
"metrics": {
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 7.8,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
"exploitabilityScore": 1.8,
"impactScore": 5.9,
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"type": "Secondary"
},
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 7.8,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
"exploitabilityScore": 1.8,
"impactScore": 5.9,
"source": "nvd@nist.gov",
"type": "Primary"
}
]
},
"published": "2025-06-18T11:15:42.920",
"references": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
],
"url": "https://git.kernel.org/stable/c/3c0f8a59f2cc8841ee6653399a77f4f3e6e9a270"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
],
"url": "https://git.kernel.org/stable/c/62ac2473553a00229e67bdf3cb023b62cf7f5a9a"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
],
"url": "https://git.kernel.org/stable/c/6402116a7b5ec80fa40fd145a80c813019cd555f"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
],
"url": "https://git.kernel.org/stable/c/66c8e816f2f2ca4a61b406503bd10bad1b35f72f"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
],
"url": "https://git.kernel.org/stable/c/91443c669d280937968f0aa4edefa741cfe35314"
}
],
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"vulnStatus": "Modified",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-787"
}
],
"source": "nvd@nist.gov",
"type": "Primary"
}
]
}
},
"redhat_vex": {
"aggregate_severity": "Moderate",
"current_release_date": "2026-08-04T19:39:29+00:00",
"cve": "CVE-2022-50131",
"id": "CVE-2022-50131",
"initial_release_date": "2022-01-01T00:00:00+00:00",
"product_status:fixed": "321",
"product_status:known_affected": "22",
"product_status:known_not_affected": "134",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "kernel: HID: mcp2221: prevent a buffer overflow in mcp_smbus_write()",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2022/cve-2022-50131.json",
"version": "3"
},
"suse_vex": {
"aggregate_severity": "moderate",
"current_release_date": "2026-09-11T16:51:48Z",
"cve": "CVE-2022-50131",
"id": "CVE-2022-50131",
"initial_release_date": "2025-06-19T03:40:53Z",
"product_status:known_affected": "344",
"product_status:known_not_affected": "388",
"product_status:recommended": "253",
"source": "SUSE CSAF VEX",
"status": "interim",
"title": "SUSE CVE CVE-2022-50131",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2022-50131.json",
"version": "43"
}
}
}
Loading…
Loading…
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.
Loading…
Loading…
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.
Loading…
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.
Loading…