{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2025-21648",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2024-12-29T08:45:45.728Z",
        "datePublished": "2025-01-19T10:18:05.700Z",
        "dateUpdated": "2026-07-14T12:39:37.244Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-05-11T21:03:44.670Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: conntrack: clamp maximum hashtable size to INT_MAX\n\nUse INT_MAX as maximum size for the conntrack hashtable. Otherwise, it\nis possible to hit WARN_ON_ONCE in __kvmalloc_node_noprof() when\nresizing hashtable because __GFP_NOWARN is unset. See:\n\n  0708a0afe291 (\"mm: Consider __GFP_NOWARN flag for oversized kvmalloc() calls\")\n\nNote: hashtable resize is only possible from init_netns."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "net/netfilter/nf_conntrack_core.c"
                    ],
                    "versions": [
                        {
                            "version": "9cc1c73ad66610bffc80b691136ffc1e9a3b1a58",
                            "lessThan": "a965f7f0ea3ae61b9165bed619d5d6da02c75f80",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "9cc1c73ad66610bffc80b691136ffc1e9a3b1a58",
                            "lessThan": "b1b2353d768f1b80cd7fe045a70adee576b9b338",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "9cc1c73ad66610bffc80b691136ffc1e9a3b1a58",
                            "lessThan": "5552b4fd44be3393b930434a7845d8d95a2a3c33",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "9cc1c73ad66610bffc80b691136ffc1e9a3b1a58",
                            "lessThan": "d5807dd1328bbc86e059c5de80d1bbee9d58ca3d",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "9cc1c73ad66610bffc80b691136ffc1e9a3b1a58",
                            "lessThan": "f559357d035877b9d0dcd273e0ff83e18e1d46aa",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "9cc1c73ad66610bffc80b691136ffc1e9a3b1a58",
                            "lessThan": "b541ba7d1f5a5b7b3e2e22dc9e40e18a7d6dbc13",
                            "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/nf_conntrack_core.c"
                    ],
                    "versions": [
                        {
                            "version": "4.7",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "4.7",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.10.234",
                            "lessThanOrEqual": "5.10.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.15.177",
                            "lessThanOrEqual": "5.15.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1.125",
                            "lessThanOrEqual": "6.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.72",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.10",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.13",
                            "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": "4.7",
                                    "versionEndExcluding": "5.10.234"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "4.7",
                                    "versionEndExcluding": "5.15.177"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "4.7",
                                    "versionEndExcluding": "6.1.125"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "4.7",
                                    "versionEndExcluding": "6.6.72"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "4.7",
                                    "versionEndExcluding": "6.12.10"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "4.7",
                                    "versionEndExcluding": "6.13"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/a965f7f0ea3ae61b9165bed619d5d6da02c75f80"
                },
                {
                    "url": "https://git.kernel.org/stable/c/b1b2353d768f1b80cd7fe045a70adee576b9b338"
                },
                {
                    "url": "https://git.kernel.org/stable/c/5552b4fd44be3393b930434a7845d8d95a2a3c33"
                },
                {
                    "url": "https://git.kernel.org/stable/c/d5807dd1328bbc86e059c5de80d1bbee9d58ca3d"
                },
                {
                    "url": "https://git.kernel.org/stable/c/f559357d035877b9d0dcd273e0ff83e18e1d46aa"
                },
                {
                    "url": "https://git.kernel.org/stable/c/b541ba7d1f5a5b7b3e2e22dc9e40e18a7d6dbc13"
                }
            ],
            "title": "netfilter: conntrack: clamp maximum hashtable size to INT_MAX",
            "x_generator": {
                "engine": "bippy-1.2.0"
            }
        },
        "adp": [
            {
                "title": "CVE Program Container",
                "references": [
                    {
                        "url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html"
                    },
                    {
                        "url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html"
                    }
                ],
                "providerMetadata": {
                    "orgId": "af854a3a-2127-422b-91ae-364da2661108",
                    "shortName": "CVE",
                    "dateUpdated": "2025-11-03T20:58:30.561Z"
                }
            },
            {
                "x_adpType": "supplier",
                "providerMetadata": {
                    "orgId": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e",
                    "shortName": "siemens-SADP",
                    "dateUpdated": "2026-07-14T12:39:37.244Z"
                },
                "affected": [
                    {
                        "vendor": "Siemens",
                        "product": "SIMATIC S7-1500 CPU 1518-4 PN/DP MFP",
                        "versions": [
                            {
                                "status": "affected",
                                "version": "V3.1.6",
                                "lessThan": "*",
                                "versionType": "custom"
                            }
                        ],
                        "defaultStatus": "unknown"
                    },
                    {
                        "vendor": "Siemens",
                        "product": "SIMATIC S7-1500 CPU 1518-4 PN/DP MFP",
                        "versions": [
                            {
                                "status": "affected",
                                "version": "V3.1.6",
                                "lessThan": "*",
                                "versionType": "custom"
                            }
                        ],
                        "defaultStatus": "unknown"
                    },
                    {
                        "vendor": "Siemens",
                        "product": "SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP",
                        "versions": [
                            {
                                "status": "affected",
                                "version": "V3.1.6",
                                "lessThan": "*",
                                "versionType": "custom"
                            }
                        ],
                        "defaultStatus": "unknown"
                    },
                    {
                        "vendor": "Siemens",
                        "product": "SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP",
                        "versions": [
                            {
                                "status": "affected",
                                "version": "V3.1.6",
                                "lessThan": "*",
                                "versionType": "custom"
                            }
                        ],
                        "defaultStatus": "unknown"
                    },
                    {
                        "vendor": "Siemens",
                        "product": "SIMATIC S7-1500 TM MFP - GNU/Linux subsystem",
                        "versions": [
                            {
                                "status": "affected",
                                "version": "0",
                                "lessThan": "*",
                                "versionType": "custom"
                            }
                        ],
                        "defaultStatus": "unknown"
                    },
                    {
                        "vendor": "Siemens",
                        "product": "SIPLUS S7-1500 CPU 1518-4 PN/DP MFP",
                        "versions": [
                            {
                                "status": "affected",
                                "version": "V3.1.6",
                                "lessThan": "*",
                                "versionType": "custom"
                            }
                        ],
                        "defaultStatus": "unknown"
                    }
                ],
                "references": [
                    {
                        "url": "https://cert-portal.siemens.com/productcert/html/ssa-265688.html"
                    },
                    {
                        "url": "https://cert-portal.siemens.com/productcert/html/ssa-019113.html"
                    }
                ]
            }
        ]
    }
}