{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-64085",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-07-19T07:54:57.032Z",
        "datePublished": "2026-07-19T15:39:56.067Z",
        "dateUpdated": "2026-07-19T15:39:56.067Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-07-19T15:39:56.067Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nhwmon: (pmbus/adm1266) bounce blackbox records through a protocol-sized buffer\n\nadm1266_pmbus_block_xfer() copies the device-supplied block payload\ninto the caller-provided buffer using the device-supplied length:\n\n\tmemcpy(data_r, &msgs[1].buf[1], msgs[1].buf[0]);\n\nThe helper does not know how large data_r is and trusts the device to\nreturn at most one record's worth of bytes.  adm1266_nvmem_read_blackbox()\nviolates that contract: it advances read_buff inside data->dev_mem in\nADM1266_BLACKBOX_SIZE (64-byte) strides while the helper is willing to\nwrite up to ADM1266_PMBUS_BLOCK_MAX (255) bytes.  A device that returns\nmore than 64 bytes on the trailing record (read_buff offset 1984 in\nthe 2048-byte dev_mem allocation) overflows dev_mem by up to 191 bytes\nbefore the post-call\n\n\tif (ret != ADM1266_BLACKBOX_SIZE)\n\t\treturn -EIO;\n\ncan reject the response.\n\nContain the fix in the caller without changing the helper signature:\nread each record into a 255-byte local bounce buffer that matches the\nhelper's maximum output, validate the returned length, and only then\ncopy exactly ADM1266_BLACKBOX_SIZE bytes into the dev_mem slot."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/hwmon/pmbus/adm1266.c"
                    ],
                    "versions": [
                        {
                            "version": "407dc802a9c0809ca6a48de4b4c63305eb84ef56",
                            "lessThan": "7896d87cbb05e097efc113243d4e38f9f8cea16c",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "407dc802a9c0809ca6a48de4b4c63305eb84ef56",
                            "lessThan": "9d5309500b4607b7198e19f0a3fa13eb864cd5fb",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "407dc802a9c0809ca6a48de4b4c63305eb84ef56",
                            "lessThan": "6098634cfa711f11a8d65368dc51ec8f7c8241ba",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "407dc802a9c0809ca6a48de4b4c63305eb84ef56",
                            "lessThan": "60c4b9fe1a3dd012014b1f561a6928a0b5db1126",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "407dc802a9c0809ca6a48de4b4c63305eb84ef56",
                            "lessThan": "83e039f0a43e0708515b0479cb7690fb93faaaa0",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "407dc802a9c0809ca6a48de4b4c63305eb84ef56",
                            "lessThan": "97a9cf2a8217ca1cdaf48cb9ab26e471632c7e7f",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "407dc802a9c0809ca6a48de4b4c63305eb84ef56",
                            "lessThan": "dd47b8c4a0a8ced442da3f008db28fbbd31feaf0",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "407dc802a9c0809ca6a48de4b4c63305eb84ef56",
                            "lessThan": "43cae21424ff8e33894a0f86c6b80b840c049fd7",
                            "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/hwmon/pmbus/adm1266.c"
                    ],
                    "versions": [
                        {
                            "version": "5.10",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "5.10",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.10.258",
                            "lessThanOrEqual": "5.10.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.15.209",
                            "lessThanOrEqual": "5.15.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1.175",
                            "lessThanOrEqual": "6.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.142",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.92",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.34",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.0.11",
                            "lessThanOrEqual": "7.0.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.1",
                            "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": "5.10",
                                    "versionEndExcluding": "5.10.258"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.10",
                                    "versionEndExcluding": "5.15.209"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.10",
                                    "versionEndExcluding": "6.1.175"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.10",
                                    "versionEndExcluding": "6.6.142"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.10",
                                    "versionEndExcluding": "6.12.92"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.10",
                                    "versionEndExcluding": "6.18.34"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.10",
                                    "versionEndExcluding": "7.0.11"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.10",
                                    "versionEndExcluding": "7.1"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/7896d87cbb05e097efc113243d4e38f9f8cea16c"
                },
                {
                    "url": "https://git.kernel.org/stable/c/9d5309500b4607b7198e19f0a3fa13eb864cd5fb"
                },
                {
                    "url": "https://git.kernel.org/stable/c/6098634cfa711f11a8d65368dc51ec8f7c8241ba"
                },
                {
                    "url": "https://git.kernel.org/stable/c/60c4b9fe1a3dd012014b1f561a6928a0b5db1126"
                },
                {
                    "url": "https://git.kernel.org/stable/c/83e039f0a43e0708515b0479cb7690fb93faaaa0"
                },
                {
                    "url": "https://git.kernel.org/stable/c/97a9cf2a8217ca1cdaf48cb9ab26e471632c7e7f"
                },
                {
                    "url": "https://git.kernel.org/stable/c/dd47b8c4a0a8ced442da3f008db28fbbd31feaf0"
                },
                {
                    "url": "https://git.kernel.org/stable/c/43cae21424ff8e33894a0f86c6b80b840c049fd7"
                }
            ],
            "title": "hwmon: (pmbus/adm1266) bounce blackbox records through a protocol-sized buffer",
            "x_generator": {
                "engine": "bippy-1.2.0"
            }
        }
    }
}