{
    "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": "2026-10-19T08:49:53.686Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-10-19T08:49:53.686Z"
            },
            "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": "cb38b1f149b7143355b37e86c841acf0076e5c2a",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "67a95c21463d066060b0f66d65a75d45bb386ffb",
                            "lessThan": "b2c67dc0e30c308647bbd9b9e5d69a44c9d2733d",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "67a95c21463d066060b0f66d65a75d45bb386ffb",
                            "lessThan": "fffcfa367072628c3144cca17d2a3c3c9e50c057",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "67a95c21463d066060b0f66d65a75d45bb386ffb",
                            "lessThan": "c1c508e8923911cb458234997e55b7a4b9aa066f",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "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": "5.10.270",
                            "lessThanOrEqual": "5.10.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.15.221",
                            "lessThanOrEqual": "5.15.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1.188",
                            "lessThanOrEqual": "6.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.157",
                            "lessThanOrEqual": "6.6.*",
                            "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",
                            "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": "5.10.270"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.7",
                                    "versionEndExcluding": "5.15.221"
                                },
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                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.7",
                                    "versionEndExcluding": "6.1.188"
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                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.7",
                                    "versionEndExcluding": "6.6.157"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.7",
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                                },
                                {
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                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                                    "versionStartIncluding": "5.7",
                                    "versionEndExcluding": "7.2.4"
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                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.7",
                                    "versionEndExcluding": "7.3"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/cb38b1f149b7143355b37e86c841acf0076e5c2a"
                },
                {
                    "url": "https://git.kernel.org/stable/c/b2c67dc0e30c308647bbd9b9e5d69a44c9d2733d"
                },
                {
                    "url": "https://git.kernel.org/stable/c/fffcfa367072628c3144cca17d2a3c3c9e50c057"
                },
                {
                    "url": "https://git.kernel.org/stable/c/c1c508e8923911cb458234997e55b7a4b9aa066f"
                },
                {
                    "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()",
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}