{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-53220",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-06-09T07:44:35.392Z",
        "datePublished": "2026-06-25T08:39:22.394Z",
        "dateUpdated": "2026-10-21T12:42:15.100Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-10-21T12:42:15.100Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: revalidate bridge ports\n\nebt_redirect_tg() dereferences br_port_get_rcu() return without a\nNULL check, causing a kernel panic when the bridge port has been\nremoved between the original hook invocation and an NFQUEUE\nreinject.\n\nA mere NULL check isn't sufficient, however.  As sashiko review\npoints out userspace can not only remove the port from the bridge,\nit could also place the device in a different virtual device, e.g.\nmacvlan.\n\nIf this happens, we must drop the packet, there is no way for us to\nreinject it into the bridge path.\n\nSwitch to _upper API, we don't need the bridge port structure.\nAlso, this fix keeps another bug intact:\n\nBoth nfnetlink_log and nfnetlink_queue use CONFIG_BRIDGE_NETFILTER\ntoo aggressive, which prevents certain logging features when queueing\nin bridge family: NETFILTER_FAMILY_BRIDGE can be enabled while the old\nCONFIG_BRIDGE_NETFILTER cruft is off.\n\nFixes tag is a common ancestor, this was always broken."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "net/bridge/netfilter/ebt_dnat.c",
                        "net/bridge/netfilter/ebt_redirect.c",
                        "net/netfilter/nfnetlink_log.c",
                        "net/netfilter/nfnetlink_queue.c"
                    ],
                    "versions": [
                        {
                            "version": "f350a0a87374418635689471606454abc7beaa3a",
                            "lessThan": "98cc0403f546c52104d654fa24d86e9bcac964d3",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "f350a0a87374418635689471606454abc7beaa3a",
                            "lessThan": "43330a1e8aace6b5a8de9aba127e9e394ab49b0f",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "f350a0a87374418635689471606454abc7beaa3a",
                            "lessThan": "4beffcd726e2a731cea4dc18e1fbc55c8d76f1a0",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "f350a0a87374418635689471606454abc7beaa3a",
                            "lessThan": "d4b1301fd3c9e5e105fd3767c68bc4ba558bb228",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "f350a0a87374418635689471606454abc7beaa3a",
                            "lessThan": "ccb9fd4b87538ccf19ccff78ee26700526d94867",
                            "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/bridge/netfilter/ebt_dnat.c",
                        "net/bridge/netfilter/ebt_redirect.c",
                        "net/netfilter/nfnetlink_log.c",
                        "net/netfilter/nfnetlink_queue.c"
                    ],
                    "versions": [
                        {
                            "version": "2.6.36",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "2.6.36",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.160",
                            "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": "2.6.36",
                                    "versionEndExcluding": "6.6.160"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.36",
                                    "versionEndExcluding": "6.12.94"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.36",
                                    "versionEndExcluding": "6.18.36"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.36",
                                    "versionEndExcluding": "7.0.13"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.36",
                                    "versionEndExcluding": "7.1"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/98cc0403f546c52104d654fa24d86e9bcac964d3"
                },
                {
                    "url": "https://git.kernel.org/stable/c/43330a1e8aace6b5a8de9aba127e9e394ab49b0f"
                },
                {
                    "url": "https://git.kernel.org/stable/c/4beffcd726e2a731cea4dc18e1fbc55c8d76f1a0"
                },
                {
                    "url": "https://git.kernel.org/stable/c/d4b1301fd3c9e5e105fd3767c68bc4ba558bb228"
                },
                {
                    "url": "https://git.kernel.org/stable/c/ccb9fd4b87538ccf19ccff78ee26700526d94867"
                }
            ],
            "title": "netfilter: revalidate bridge ports",
            "x_generator": {
                "engine": "bippy-1.2.0"
            }
        }
    }
}