{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-53269",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-06-09T07:44:35.395Z",
        "datePublished": "2026-06-25T08:39:55.172Z",
        "dateUpdated": "2026-06-25T08:39:55.172Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-06-25T08:39:55.172Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: synproxy: add mutex to guard hook reference counting\n\nAs the synproxy infrastructure register netfilter hooks on-demand when a\nuser adds the first iptables target or nftables expression, if done\nconcurrently they can race each other.\n\nIntroduce a mutex to serialize the refcount control blocks access from\nboth frontends. While a per namespace mutex might be more efficient, it\nis not needed for target/expression like SYNPROXY."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "net/netfilter/nf_synproxy_core.c"
                    ],
                    "versions": [
                        {
                            "version": "ad49d86e07a497e834cb06f2b151dccd75f8e148",
                            "lessThan": "0ec9ddc1bda261a2c57636c74c8b4e53000102c9",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "ad49d86e07a497e834cb06f2b151dccd75f8e148",
                            "lessThan": "56ffbe3a08c01dcdb0d6adee9ce1e535bfb3b389",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "ad49d86e07a497e834cb06f2b151dccd75f8e148",
                            "lessThan": "debc57b83d5b323df74bf010c8d50fe26ad2ed6b",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "ad49d86e07a497e834cb06f2b151dccd75f8e148",
                            "lessThan": "0f8ba5e4c53d2e4a536aa68140beda9fe59b2f88",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "ad49d86e07a497e834cb06f2b151dccd75f8e148",
                            "lessThan": "640441348258220e78daed40528b85b8afcedab6",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "ad49d86e07a497e834cb06f2b151dccd75f8e148",
                            "lessThan": "aaf80701dc2f7a48fe543961e21f8ca3924d587c",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "ad49d86e07a497e834cb06f2b151dccd75f8e148",
                            "lessThan": "fbf0591275f50eae5733c3d7a8cd6c1e79933ffa",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "ad49d86e07a497e834cb06f2b151dccd75f8e148",
                            "lessThan": "2fcba19caaeb2a33017459d3430f057967bb91b6",
                            "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_synproxy_core.c"
                    ],
                    "versions": [
                        {
                            "version": "5.3",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "5.3",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.10.259",
                            "lessThanOrEqual": "5.10.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.15.210",
                            "lessThanOrEqual": "5.15.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1.176",
                            "lessThanOrEqual": "6.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.143",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.94",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.36",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.0.13",
                            "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": "5.3",
                                    "versionEndExcluding": "5.10.259"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.3",
                                    "versionEndExcluding": "5.15.210"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.3",
                                    "versionEndExcluding": "6.1.176"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.3",
                                    "versionEndExcluding": "6.6.143"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.3",
                                    "versionEndExcluding": "6.12.94"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.3",
                                    "versionEndExcluding": "6.18.36"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.3",
                                    "versionEndExcluding": "7.0.13"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.3",
                                    "versionEndExcluding": "7.1"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/0ec9ddc1bda261a2c57636c74c8b4e53000102c9"
                },
                {
                    "url": "https://git.kernel.org/stable/c/56ffbe3a08c01dcdb0d6adee9ce1e535bfb3b389"
                },
                {
                    "url": "https://git.kernel.org/stable/c/debc57b83d5b323df74bf010c8d50fe26ad2ed6b"
                },
                {
                    "url": "https://git.kernel.org/stable/c/0f8ba5e4c53d2e4a536aa68140beda9fe59b2f88"
                },
                {
                    "url": "https://git.kernel.org/stable/c/640441348258220e78daed40528b85b8afcedab6"
                },
                {
                    "url": "https://git.kernel.org/stable/c/aaf80701dc2f7a48fe543961e21f8ca3924d587c"
                },
                {
                    "url": "https://git.kernel.org/stable/c/fbf0591275f50eae5733c3d7a8cd6c1e79933ffa"
                },
                {
                    "url": "https://git.kernel.org/stable/c/2fcba19caaeb2a33017459d3430f057967bb91b6"
                }
            ],
            "title": "netfilter: synproxy: add mutex to guard hook reference counting",
            "x_generator": {
                "engine": "bippy-1.2.0"
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    }
}