{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-74694",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-08-15T05:44:03.926Z",
        "datePublished": "2026-08-22T15:32:57.113Z",
        "dateUpdated": "2026-08-22T15:32:57.113Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-08-22T15:32:57.113Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/ncsi: fix heap OOB read in NCSI_CMD_SEND_CMD payload length\n\nncsi_send_cmd_nl() takes the number of bytes to copy from the\nattacker-controlled ncsi_pkt_hdr.length field of the in-band packet\nheader, while the source buffer is the NCSI_ATTR_DATA netlink\nattribute whose readable size is nla_len() - sizeof(ncsi_pkt_hdr).\nThe two length sources are never cross-checked: only\nnla_len() >= sizeof(struct ncsi_pkt_hdr) is enforced.\n\nWith hdr->length set larger than the attribute payload (up to 65535\nagainst at most 2032 readable bytes), ncsi_cmd_handler_oem() copies\npast the end of the netlink attribute buffer with unsafe_memcpy(),\nleaking up to ~64KB of kernel heap memory into the transmitted NCSI\ncommand packet. The destination skb is sized by the declared payload,\nso the write side does not overflow - this is a pure OOB read /\ninformation leak, reachable with CAP_NET_ADMIN on systems with a\nregistered NCSI device (e.g. OpenBMC on Aspeed BMC SoCs, where\nNET_NCSI=y is standard).\n\nReject commands whose declared payload extends past the end of the\ndata attribute.\n\nThe issue was found by the autokbug dynamic kernel fuzzer at Tencent\nYunding Lab."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "net/ncsi/ncsi-netlink.c"
                    ],
                    "versions": [
                        {
                            "version": "9771b8ccdfa6dcb1ac5128ca7fe8649f3092d392",
                            "lessThan": "e60afa01d35f8b2671b27ca93309921427144cce",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "9771b8ccdfa6dcb1ac5128ca7fe8649f3092d392",
                            "lessThan": "67c72b8ef63d9d9a610546fda30b116638f39745",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "9771b8ccdfa6dcb1ac5128ca7fe8649f3092d392",
                            "lessThan": "4489b4a17892750131e4bef4bc1d3d703c8fb5ba",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "9771b8ccdfa6dcb1ac5128ca7fe8649f3092d392",
                            "lessThan": "43c7d0a6917751ea898ae584d00f24f5deac46d4",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "9771b8ccdfa6dcb1ac5128ca7fe8649f3092d392",
                            "lessThan": "b5231ad0b376b801ab8cf2962b182cc29deaedb3",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "9771b8ccdfa6dcb1ac5128ca7fe8649f3092d392",
                            "lessThan": "02226af69362758046822840fc6a497f5de33f00",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "9771b8ccdfa6dcb1ac5128ca7fe8649f3092d392",
                            "lessThan": "3a60b5af75abe8e3494ccd074fb4ae6e601a3e55",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "9771b8ccdfa6dcb1ac5128ca7fe8649f3092d392",
                            "lessThan": "afa58b7384913c8773d837acdb07b035690ec5d2",
                            "status": "affected",
                            "versionType": "git"
                        }
                    ]
                },
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "net/ncsi/ncsi-netlink.c"
                    ],
                    "versions": [
                        {
                            "version": "4.20",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "4.20",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.10.265",
                            "lessThanOrEqual": "5.10.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.15.216",
                            "lessThanOrEqual": "5.15.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1.183",
                            "lessThanOrEqual": "6.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.152",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.104",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.45",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.1.9",
                            "lessThanOrEqual": "7.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.2",
                            "lessThanOrEqual": "*",
                            "status": "unaffected",
                            "versionType": "original_commit_for_fix"
                        }
                    ]
                }
            ],
            "cpeApplicability": [
                {
                    "nodes": [
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                            "operator": "OR",
                            "negate": false,
                            "cpeMatch": [
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                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "4.20",
                                    "versionEndExcluding": "5.10.265"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/e60afa01d35f8b2671b27ca93309921427144cce"
                },
                {
                    "url": "https://git.kernel.org/stable/c/67c72b8ef63d9d9a610546fda30b116638f39745"
                },
                {
                    "url": "https://git.kernel.org/stable/c/4489b4a17892750131e4bef4bc1d3d703c8fb5ba"
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                    "url": "https://git.kernel.org/stable/c/43c7d0a6917751ea898ae584d00f24f5deac46d4"
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                },
                {
                    "url": "https://git.kernel.org/stable/c/afa58b7384913c8773d837acdb07b035690ec5d2"
                }
            ],
            "title": "net/ncsi: fix heap OOB read in NCSI_CMD_SEND_CMD payload length",
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