{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2023-53200",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2025-09-15T13:59:19.067Z",
        "datePublished": "2025-09-15T14:21:28.466Z",
        "dateUpdated": "2026-05-11T19:40:12.748Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-05-11T19:40:12.748Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: x_tables: fix percpu counter block leak on error path when creating new netns\n\nHere is the stack where we allocate percpu counter block:\n\n  +-< __alloc_percpu\n    +-< xt_percpu_counter_alloc\n      +-< find_check_entry # {arp,ip,ip6}_tables.c\n        +-< translate_table\n\nAnd it can be leaked on this code path:\n\n  +-> ip6t_register_table\n    +-> translate_table # allocates percpu counter block\n    +-> xt_register_table # fails\n\nthere is no freeing of the counter block on xt_register_table fail.\nNote: xt_percpu_counter_free should be called to free it like we do in\ndo_replace through cleanup_entry helper (or in __ip6t_unregister_table).\n\nProbability of hitting this error path is low AFAICS (xt_register_table\ncan only return ENOMEM here, as it is not replacing anything, as we are\ncreating new netns, and it is hard to imagine that all previous\nallocations succeeded and after that one in xt_register_table failed).\nBut it's worth fixing even the rare leak."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "net/ipv4/netfilter/arp_tables.c",
                        "net/ipv4/netfilter/ip_tables.c",
                        "net/ipv6/netfilter/ip6_tables.c"
                    ],
                    "versions": [
                        {
                            "version": "71ae0dff02d756e4d2ca710b79f2ff5390029a5f",
                            "lessThan": "e306dbee4c98025a9326386023a12ef4d887e9d1",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "71ae0dff02d756e4d2ca710b79f2ff5390029a5f",
                            "lessThan": "512b6c4b83c91d007301ea7d7f095d16c3aceacd",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "71ae0dff02d756e4d2ca710b79f2ff5390029a5f",
                            "lessThan": "3cc9610a87b7dde82f7360dd4eb6c2c27940ed57",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "71ae0dff02d756e4d2ca710b79f2ff5390029a5f",
                            "lessThan": "0af8c09c896810879387decfba8c942994bb61f5",
                            "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/ipv4/netfilter/arp_tables.c",
                        "net/ipv4/netfilter/ip_tables.c",
                        "net/ipv6/netfilter/ip6_tables.c"
                    ],
                    "versions": [
                        {
                            "version": "4.2",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "4.2",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.15.100",
                            "lessThanOrEqual": "5.15.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1.18",
                            "lessThanOrEqual": "6.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.2.5",
                            "lessThanOrEqual": "6.2.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.3",
                            "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": "4.2",
                                    "versionEndExcluding": "5.15.100"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "4.2",
                                    "versionEndExcluding": "6.1.18"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "4.2",
                                    "versionEndExcluding": "6.2.5"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "4.2",
                                    "versionEndExcluding": "6.3"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/e306dbee4c98025a9326386023a12ef4d887e9d1"
                },
                {
                    "url": "https://git.kernel.org/stable/c/512b6c4b83c91d007301ea7d7f095d16c3aceacd"
                },
                {
                    "url": "https://git.kernel.org/stable/c/3cc9610a87b7dde82f7360dd4eb6c2c27940ed57"
                },
                {
                    "url": "https://git.kernel.org/stable/c/0af8c09c896810879387decfba8c942994bb61f5"
                }
            ],
            "title": "netfilter: x_tables: fix percpu counter block leak on error path when creating new netns",
            "x_generator": {
                "engine": "bippy-1.2.0"
            }
        }
    }
}