CVE-2022-50131

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So add an bound check to prevent a\nbuffer overflow in memcpy()."}], "metrics": [{"cvssV3_1": {"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"}, "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->block[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->txbuf 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->block[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."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/hid/hid-mcp2221.c"], "versions": [{"version": "67a95c21463d066060b0f66d65a75d45bb386ffb", "lessThan": "66c8e816f2f2ca4a61b406503bd10bad1b35f72f", "status": "affected", "versionType": "git"}, {"version": "67a95c21463d066060b0f66d65a75d45bb386ffb", "lessThan": "91443c669d280937968f0aa4edefa741cfe35314", "status": "affected", "versionType": "git"}, {"version": "67a95c21463d066060b0f66d65a75d45bb386ffb", "lessThan": "6402116a7b5ec80fa40fd145a80c813019cd555f", "status": "affected", "versionType": "git"}, {"version": "67a95c21463d066060b0f66d65a75d45bb386ffb", "lessThan": "3c0f8a59f2cc8841ee6653399a77f4f3e6e9a270", "status": "affected", "versionType": "git"}, {"version": "67a95c21463d066060b0f66d65a75d45bb386ffb", "lessThan": "62ac2473553a00229e67bdf3cb023b62cf7f5a9a", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/hid/hid-mcp2221.c"], "versions": [{"version": "5.7", "status": "affected"}, {"version": "0", "lessThan": "5.7", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.137", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.61", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.18.18", "lessThanOrEqual": "5.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.19.2", "lessThanOrEqual": "5.19.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.0", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.7", "versionEndExcluding": "5.10.137"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.7", "versionEndExcluding": "5.15.61"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.7", "versionEndExcluding": "5.18.18"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.7", "versionEndExcluding": "5.19.2"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.7", "versionEndExcluding": "6.0"}]}]}], "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"}}}}

{}

{"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'&mcp->txbuf[5]' too small (59 vs 255)\ndrivers/hid/hid-mcp2221.c:388 mcp_smbus_write() error: __memcpy() 'buf'\ntoo small (34 vs 255)\n\nThe 'len' variable can take a value between 0-255 as it can come from\ndata->block[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() '&mcp->txbuf[5]' demasiado peque\u00f1o (59 frente a 255) drivers/hid/hid-mcp2221.c:388 Error de mcp_smbus_write(): __memcpy() 'buf' demasiado peque\u00f1o (34 frente a 255) La variable 'len' puede tomar un valor entre 0 y 255, ya que puede provenir de data->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"}]}

{"bugzilla": {"description": "kernel: HID: mcp2221: prevent a buffer overflow in mcp_smbus_write()", "id": "2373502", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2373502"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.0", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "details": ["In the Linux kernel, the following vulnerability has been resolved:\nHID: mcp2221: prevent a buffer overflow in mcp_smbus_write()\nSmatch Warning:\ndrivers/hid/hid-mcp2221.c:388 mcp_smbus_write() error: __memcpy()\n'&mcp->txbuf[5]' too small (59 vs 255)\ndrivers/hid/hid-mcp2221.c:388 mcp_smbus_write() error: __memcpy() 'buf'\ntoo small (34 vs 255)\nThe 'len' variable can take a value between 0-255 as it can come from\ndata->block[0] and it is user data. So add an bound check to prevent a\nbuffer overflow in memcpy()."], "name": "CVE-2022-50131", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2025-06-18T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2022-50131\nhttps://nvd.nist.gov/vuln/detail/CVE-2022-50131\nhttps://lore.kernel.org/linux-cve-announce/2025061815-CVE-2022-50131-4df3@gregkh/T"], "threat_severity": "Moderate"}

{"created": "2025-06-23T08:45:29.860853+00:00", "updated": "2025-06-23T08:45:29.860905+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}