{"id":"CVE-2026-80664","revision":"e598ec55750148678d37be1e4d64e6d5","records":[{"revision":"e598ec55750148678d37be1e4d64e6d5","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-80664","aliases":[],"title":"netfilter: xt_nat: reject unsupported target families","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: xt_nat: reject unsupported target families\n\nxt_nat SNAT and DNAT target handlers assume IP-family conntrack state\nis present and can dereference a NULL pointer when instantiated from an\nunsupported family through nft_compat. A bridge-family compat rule can\ntherefore trigger a NULL-dereference in nf_nat_setup_info().\n\nReject non-IP families in xt_nat_checkentry() so unsupported targets\ncannot be installed. Keep NFPROTO_INET allowed for valid inet NAT\ncompat users and leave the runtime fast path unchanged.\n\n[ The crash was fixed via\n  9dbba7e694ec (\"netfilter: nft_compat: ebtables emulation must reject non-bridge targets\"),\n  so this patch is no longer critical.\n  Nevertheless, NAT is only relevant for ipv4/ipv6, so this extra\n  family check is a good idea in any case. ]","state":0,"publishedAt":"2026-08-28T06:49:07.478+00:00","modifiedAt":"2026-10-16T19:26:32.191+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"net/netfilter/xt_nat.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"c7232c9979cba684c50b64c513c4a83c9aa70563\",\n                            \"lessThan\": \"49abe564391411057a26a9a943c8e17867c3b9b4\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"c7232c9979cba684c50b64c513c4a83c9aa70563\",\n                            \"lessThan\": \"0afc9ad987c0faa80ab5f8d6e7815085ac8dbb82\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"c7232c9979cba684c50b64c513c4a83c9aa70563\",\n                            \"lessThan\": \"4fbc2bac02edabb665beb2aa87ca6f1e1d4c4777\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"c7232c9979cba684c50b64c513c4a83c9aa70563\",\n                            \"lessThan\": \"a842dab87cab29f2a5798a47b2dc5e6a449950bf\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"c7232c9979cba684c50b64c513c4a83c9aa70563\",\n                            \"lessThan\": \"e35c048d7511e9d4c2a537b8a231c49606e97c16\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"c7232c9979cba684c50b64c513c4a83c9aa70563\",\n                            \"lessThan\": \"679ced28a9dc2f6dc679eb05027d779693e60902\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"c7232c9979cba684c50b64c513c4a83c9aa70563\",\n                            \"lessThan\": \"ec88fa71c82072e9189983b05b499d3507550271\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"c7232c9979cba684c50b64c513c4a83c9aa70563\",\n                            \"lessThan\": \"5d1a2240935ea47e2673d0ea17fdb058e4dc91dd\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"net/netfilter/xt_nat.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"3.7\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"3.7\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.10.261\",\n                            \"lessThanOrEqual\": \"5.10.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.15.212\",\n                            \"lessThanOrEqual\": \"5.15.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.178\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.145\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.97\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.40\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.1.5\",\n                            \"lessThanOrEqual\": \"7.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:H","score":7.3,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/49abe564391411057a26a9a943c8e17867c3b9b4","https://git.kernel.org/stable/c/0afc9ad987c0faa80ab5f8d6e7815085ac8dbb82","https://git.kernel.org/stable/c/4fbc2bac02edabb665beb2aa87ca6f1e1d4c4777","https://git.kernel.org/stable/c/a842dab87cab29f2a5798a47b2dc5e6a449950bf","https://git.kernel.org/stable/c/e35c048d7511e9d4c2a537b8a231c49606e97c16","https://git.kernel.org/stable/c/679ced28a9dc2f6dc679eb05027d779693e60902","https://git.kernel.org/stable/c/ec88fa71c82072e9189983b05b499d3507550271","https://git.kernel.org/stable/c/5d1a2240935ea47e2673d0ea17fdb058e4dc91dd"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-80664","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-80664","identifiers":["CVE-2026-80664"]},"retained":false,"historicalAffected":[]}],"coverage":[]}