{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-89621", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-11T19:38:34.736Z", "datePublished": "2026-09-11T19:45:19.420Z", "dateUpdated": "2026-09-11T19:45:19.420Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-09-11T19:45:19.420Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nHID: mcp2221: validate report size in mcp2221_raw_event()\n\nmcp2221_raw_event() never validates the size of incoming HID reports.\nIn the MCP2221_I2C_GET_DATA path it trusts the device-supplied data[3]\nas the copy length without checking that 4 + data[3] bytes actually\nexist in the received report. A malicious or misbehaving USB device can\nsend a short report with a large data[3], causing the memcpy to read\npast the valid report data in the HID transfer buffer and leak\nuninitialized kernel memory back to userspace through the I2C/SMBus\nread path.\n\nAdd a minimum size check at entry and validate that the source range\nfits within the received report before the copy."}], "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": "bdc6a3af0dd734a326acdb7d6401a3b6a9f4f149", "status": "affected", "versionType": "git"}, {"version": "67a95c21463d066060b0f66d65a75d45bb386ffb", "lessThan": "127de5919820f88a9d55e8371ad4ac49f625f4c5", "status": "affected", "versionType": "git"}, {"version": "67a95c21463d066060b0f66d65a75d45bb386ffb", "lessThan": "7c18fb36708a97ff6772825cc087b6d537bbf0d5", "status": "affected", "versionType": "git"}, {"version": "67a95c21463d066060b0f66d65a75d45bb386ffb", "lessThan": "2c9a6998c19503626c57a2267bf279e204113079", "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": "6.12.109", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.50", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.4", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.3-rc1", "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": "6.12.109"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.7", "versionEndExcluding": "6.18.50"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.7", "versionEndExcluding": "7.2.4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.7", "versionEndExcluding": "7.3-rc1"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/bdc6a3af0dd734a326acdb7d6401a3b6a9f4f149"}, {"url": "https://git.kernel.org/stable/c/127de5919820f88a9d55e8371ad4ac49f625f4c5"}, {"url": "https://git.kernel.org/stable/c/7c18fb36708a97ff6772825cc087b6d537bbf0d5"}, {"url": "https://git.kernel.org/stable/c/2c9a6998c19503626c57a2267bf279e204113079"}], "title": "HID: mcp2221: validate report size in mcp2221_raw_event()", "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": "bdc6a3af0dd734a326acdb7d6401a3b6a9f4f149", "status": "affected", "version": "67a95c21463d066060b0f66d65a75d45bb386ffb", "versionType": "git"}, {"lessThan": "127de5919820f88a9d55e8371ad4ac49f625f4c5", "status": "affected", "version": "67a95c21463d066060b0f66d65a75d45bb386ffb", "versionType": "git"}, {"lessThan": "7c18fb36708a97ff6772825cc087b6d537bbf0d5", "status": "affected", "version": "67a95c21463d066060b0f66d65a75d45bb386ffb", "versionType": "git"}, {"lessThan": "2c9a6998c19503626c57a2267bf279e204113079", "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": "6.12.*", "status": "unaffected", "version": "6.12.109", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.50", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.4", "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\nHID: mcp2221: validate report size in mcp2221_raw_event()\n\nmcp2221_raw_event() never validates the size of incoming HID reports.\nIn the MCP2221_I2C_GET_DATA path it trusts the device-supplied data[3]\nas the copy length without checking that 4 + data[3] bytes actually\nexist in the received report. A malicious or misbehaving USB device can\nsend a short report with a large data[3], causing the memcpy to read\npast the valid report data in the HID transfer buffer and leak\nuninitialized kernel memory back to userspace through the I2C/SMBus\nread path.\n\nAdd a minimum size check at entry and validate that the source range\nfits within the received report before the copy."}], "id": "CVE-2026-89621", "lastModified": "2026-09-11T20:19:47.397", "metrics": {}, "published": "2026-09-11T20:19:47.397", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/127de5919820f88a9d55e8371ad4ac49f625f4c5"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/2c9a6998c19503626c57a2267bf279e204113079"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/7c18fb36708a97ff6772825cc087b6d537bbf0d5"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/bdc6a3af0dd734a326acdb7d6401a3b6a9f4f149"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: Linux kernel: Information disclosure in HID mcp2221 driver via crafted USB report", "id": "2532406", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2532406"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.3", "cvss3_scoring_vector": "CVSS:3.1/AV:P/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N", "status": "draft"}, "cwe": "CWE-125", "details": ["A flaw was found in the Linux kernel's HID (Human Interface Device) mcp2221 driver. A malicious USB device can exploit this vulnerability by sending a specially crafted, short HID report with an invalid size. This can cause the system to read past valid memory, leading to the disclosure of sensitive kernel memory to userspace through the I2C/SMBus read path. This information disclosure could potentially expose confidential system data."], "name": "CVE-2026-89621", "public_date": "2026-09-11T19:45:19Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-89621\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-89621\nhttps://git.kernel.org/stable/c/127de5919820f88a9d55e8371ad4ac49f625f4c5\nhttps://git.kernel.org/stable/c/2c9a6998c19503626c57a2267bf279e204113079\nhttps://git.kernel.org/stable/c/7c18fb36708a97ff6772825cc087b6d537bbf0d5\nhttps://git.kernel.org/stable/c/bdc6a3af0dd734a326acdb7d6401a3b6a9f4f149"], "threat_severity": "Moderate"}

{"created": "2026-09-12T09:15:12.757640+00:00", "updated": "2026-09-12T15:30:16.637011+00:00", "vendors": []}