{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-89628",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-09-11T19:38:34.738Z",
        "datePublished": "2026-09-11T19:45:24.203Z",
        "dateUpdated": "2026-10-19T08:50:00.490Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-10-19T08:50:00.490Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nHID: picolcd: clamp eeprom debugfs read to bytes actually received\n\npicolcd_debug_eeprom_read() trusts resp->raw_data[2] -- a length byte\nsupplied by the device in its REPORT_EE_DATA reply -- clamped only to\nthe caller's read() count:\n\n\tret = resp->raw_data[2];\n\tif (ret > s)\n\t\tret = s;\n\tif (copy_to_user(u, resp->raw_data+3, ret))\n\nIt never checks resp->raw_size, the number of bytes picolcd_raw_event()\nactually copied into the 64-byte raw_data[] of the kmalloc'd struct\npicolcd_pending. A device (or a spoofed picoLCD) returning a length byte\nof 0xff, read with a count >= 255, makes copy_to_user() read past\nraw_data[] into adjacent slab memory and return it to userspace through\nthe debugfs \"eeprom\" file:\n\n\tBUG: KASAN: slab-out-of-bounds in _copy_to_user\n\tRead of size 255 ... picolcd_debug_eeprom_read+0x214/0x2f0 [hid_picolcd]\n\nThe debug-dump path in the same file already validates the device length\nbyte against the received size before trusting it; this read does not.\nThe file is created S_IRUSR (root-only) and a crafted device is needed,\nso it is neither unprivileged- nor remotely-triggerable.\n\nClamp the copy length to resp->raw_size - 3 (the payload actually\nreceived, minus the 3-byte header), floored at 0 for short replies."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/hid/hid-picolcd_debugfs.c"
                    ],
                    "versions": [
                        {
                            "version": "9bbf2b98ba11d00bd73e3254e15cfe17ccaff6ba",
                            "lessThan": "1a02056c2bf7ef9b5fd05ee6913aeeadb703c443",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "9bbf2b98ba11d00bd73e3254e15cfe17ccaff6ba",
                            "lessThan": "65daa322f1021d8206f8032c4cd4c0cb2d26c7c3",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "9bbf2b98ba11d00bd73e3254e15cfe17ccaff6ba",
                            "lessThan": "8dc662af019158690c470edd2e2857657f700abb",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "9bbf2b98ba11d00bd73e3254e15cfe17ccaff6ba",
                            "lessThan": "4daf432c94a42e7be6aa10b012b33af5ed9bc118",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "9bbf2b98ba11d00bd73e3254e15cfe17ccaff6ba",
                            "lessThan": "a3e6e8d7198a9f3861861520a38b673684a1062b",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "9bbf2b98ba11d00bd73e3254e15cfe17ccaff6ba",
                            "lessThan": "471f4a939c66d1d44aece2321807abf609fc9098",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "9bbf2b98ba11d00bd73e3254e15cfe17ccaff6ba",
                            "lessThan": "699a3c8b56e168ca19d12722f3f5ef1d6f4b1d84",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "9bbf2b98ba11d00bd73e3254e15cfe17ccaff6ba",
                            "lessThan": "e9c667395ac1f8024f623250b32bae4c7af9caa0",
                            "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-picolcd_debugfs.c"
                    ],
                    "versions": [
                        {
                            "version": "2.6.35",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "2.6.35",
                            "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": "2.6.35",
                                    "versionEndExcluding": "5.10.270"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.35",
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                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                                    "versionStartIncluding": "2.6.35",
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                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.35",
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                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.35",
                                    "versionEndExcluding": "7.2.4"
                                },
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                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.35",
                                    "versionEndExcluding": "7.3"
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            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/1a02056c2bf7ef9b5fd05ee6913aeeadb703c443"
                },
                {
                    "url": "https://git.kernel.org/stable/c/65daa322f1021d8206f8032c4cd4c0cb2d26c7c3"
                },
                {
                    "url": "https://git.kernel.org/stable/c/8dc662af019158690c470edd2e2857657f700abb"
                },
                {
                    "url": "https://git.kernel.org/stable/c/4daf432c94a42e7be6aa10b012b33af5ed9bc118"
                },
                {
                    "url": "https://git.kernel.org/stable/c/a3e6e8d7198a9f3861861520a38b673684a1062b"
                },
                {
                    "url": "https://git.kernel.org/stable/c/471f4a939c66d1d44aece2321807abf609fc9098"
                },
                {
                    "url": "https://git.kernel.org/stable/c/699a3c8b56e168ca19d12722f3f5ef1d6f4b1d84"
                },
                {
                    "url": "https://git.kernel.org/stable/c/e9c667395ac1f8024f623250b32bae4c7af9caa0"
                }
            ],
            "title": "HID: picolcd: clamp eeprom debugfs read to bytes actually received",
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    }
}