netfilter: require Ethernet MAC header before using eth_hdr()

{
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "net/ipv6/netfilter/ip6t_eui64.c",
                        "net/netfilter/ipset/ip_set_bitmap_ipmac.c",
                        "net/netfilter/ipset/ip_set_hash_ipmac.c",
                        "net/netfilter/ipset/ip_set_hash_mac.c",
                        "net/netfilter/nf_log_syslog.c",
                        "net/netfilter/xt_mac.c"
                    ],
                    "versions": [
                        {
                            "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
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                        },
                        {
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                        }
                    ]
                }

{
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "net/ipv6/netfilter/ip6t_eui64.c",
                        "net/netfilter/ipset/ip_set_bitmap_ipmac.c",
                        "net/netfilter/ipset/ip_set_hash_ipmac.c",
                        "net/netfilter/ipset/ip_set_hash_mac.c",
                        "net/netfilter/nf_log_syslog.c",
                        "net/netfilter/xt_mac.c"
                    ],
                    "versions": [
                        {
                            "version": "2.6.12",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "2.6.12",
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                            "versionType": "semver"
                        },
                        {
                            "version": "5.15.210",
                            "lessThanOrEqual": "5.15.*",
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                        },
                        {
                            "version": "6.1.176",
                            "lessThanOrEqual": "6.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.143",
                            "lessThanOrEqual": "6.6.*",
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                        },
                        {
                            "version": "6.12.94",
                            "lessThanOrEqual": "6.12.*",
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                        },
                        {
                            "version": "6.18.36",
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                            "versionType": "semver"
                        },
                        {
                            "version": "7.0.13",
                            "lessThanOrEqual": "7.0.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.1",
                            "lessThanOrEqual": "*",
                            "status": "unaffected",
                            "versionType": "original_commit_for_fix"
                        }
                    ]
                }