{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-43085",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-05-01T14:12:55.983Z",
        "datePublished": "2026-05-06T07:40:19.915Z",
        "dateUpdated": "2026-06-01T16:14:26.215Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-06-01T16:14:26.215Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nfnetlink_log: initialize nfgenmsg in NLMSG_DONE terminator\n\nWhen batching multiple NFLOG messages (inst->qlen > 1), __nfulnl_send()\nappends an NLMSG_DONE terminator with sizeof(struct nfgenmsg) payload via\nnlmsg_put(), but never initializes the nfgenmsg bytes. The nlmsg_put()\nhelper only zeroes alignment padding after the payload, not the payload\nitself, so four bytes of stale kernel heap data are leaked to userspace\nin the NLMSG_DONE message body.\n\nUse nfnl_msg_put() to build the NLMSG_DONE terminator, which initializes\nthe nfgenmsg payload via nfnl_fill_hdr(), consistent with how\n__build_packet_message() already constructs NFULNL_MSG_PACKET headers."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "net/netfilter/nfnetlink_log.c"
                    ],
                    "versions": [
                        {
                            "version": "29c5d4afba51c71cfeadd3f74f3c42e064483fb0",
                            "lessThan": "296f18e1c3a87c915a92ed27832d5040a22d1072",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "29c5d4afba51c71cfeadd3f74f3c42e064483fb0",
                            "lessThan": "9e2182865de781c41ab16b7985e9d26dcefea867",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "29c5d4afba51c71cfeadd3f74f3c42e064483fb0",
                            "lessThan": "57cc509d82b46150a11dcecc8b25eaa177eda34d",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "29c5d4afba51c71cfeadd3f74f3c42e064483fb0",
                            "lessThan": "368c22aea490f6f50df831b4f9e3623787686c5b",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "29c5d4afba51c71cfeadd3f74f3c42e064483fb0",
                            "lessThan": "d1399632ba255d2e02c757af5d9f5d9279ce168c",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "29c5d4afba51c71cfeadd3f74f3c42e064483fb0",
                            "lessThan": "d552bcfca323d175664d7444989b04f55666978a",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "29c5d4afba51c71cfeadd3f74f3c42e064483fb0",
                            "lessThan": "15d209bccf9273b4a8b4e579ba0e92d065b6ec8c",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "29c5d4afba51c71cfeadd3f74f3c42e064483fb0",
                            "lessThan": "1f3083aec8836213da441270cdb1ab612dd82cf4",
                            "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/netfilter/nfnetlink_log.c"
                    ],
                    "versions": [
                        {
                            "version": "2.6.23",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "2.6.23",
                            "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": "6.6.136",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.83",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.24",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.19.14",
                            "lessThanOrEqual": "6.19.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.0",
                            "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": "2.6.23",
                                    "versionEndExcluding": "5.10.258"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.23",
                                    "versionEndExcluding": "5.15.209"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.23",
                                    "versionEndExcluding": "6.1.175"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.23",
                                    "versionEndExcluding": "6.6.136"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.23",
                                    "versionEndExcluding": "6.12.83"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.23",
                                    "versionEndExcluding": "6.18.24"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.23",
                                    "versionEndExcluding": "6.19.14"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.23",
                                    "versionEndExcluding": "7.0"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/296f18e1c3a87c915a92ed27832d5040a22d1072"
                },
                {
                    "url": "https://git.kernel.org/stable/c/9e2182865de781c41ab16b7985e9d26dcefea867"
                },
                {
                    "url": "https://git.kernel.org/stable/c/57cc509d82b46150a11dcecc8b25eaa177eda34d"
                },
                {
                    "url": "https://git.kernel.org/stable/c/368c22aea490f6f50df831b4f9e3623787686c5b"
                },
                {
                    "url": "https://git.kernel.org/stable/c/d1399632ba255d2e02c757af5d9f5d9279ce168c"
                },
                {
                    "url": "https://git.kernel.org/stable/c/d552bcfca323d175664d7444989b04f55666978a"
                },
                {
                    "url": "https://git.kernel.org/stable/c/15d209bccf9273b4a8b4e579ba0e92d065b6ec8c"
                },
                {
                    "url": "https://git.kernel.org/stable/c/1f3083aec8836213da441270cdb1ab612dd82cf4"
                }
            ],
            "title": "netfilter: nfnetlink_log: initialize nfgenmsg in NLMSG_DONE terminator",
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                "engine": "bippy-1.2.0"
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    }
}