{"id":"CVE-2026-46244","revision":"2a21009ad2d942b098ea5c9c807d0247","records":[{"revision":"2a21009ad2d942b098ea5c9c807d0247","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-46244","aliases":[],"title":"netfilter: nft_inner: Fix IPv6 inner_thoff desync","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nft_inner: Fix IPv6 inner_thoff desync\n\nIn nft_inner_parse_l2l3(), when processing inner IPv6 packets,\nipv6_find_hdr() correctly computes the transport header offset\ntraversing all extension headers, but the result is immediately\noverwritten with nhoff + sizeof(_ip6h) (40 bytes), which only\naccounts for the IPv6 base header. This creates a desync between\ninner_thoff (wrong — points to extension header start) and l4proto\n(correct — e.g., IPPROTO_TCP), enabling transport header forgery\nand potential firewall bypass. This issue affects stable versions\nfrom Linux 6.2.\n\nFor comparison, the normal (non-inner) IPv6 path correctly\npreserves ipv6_find_hdr()'s result. Removing the incorrect overwrite\nensures that ipv6_find_hdr()'s calculated transport header offset is\npreserved, thereby fixing the desynchronization.","state":0,"publishedAt":"2026-06-03T15:48:59.049+00:00","modifiedAt":"2026-10-19T19:36:55.855+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/nft_inner.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"3a07327d10a09379315c844c63f27941f5081e0a\",\n                            \"lessThan\": \"c161ad9157f5a0429b5ff94d9770faf3bf48d273\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"3a07327d10a09379315c844c63f27941f5081e0a\",\n                            \"lessThan\": \"870d59e2cf218e7418491e26bad768cb16654582\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"3a07327d10a09379315c844c63f27941f5081e0a\",\n                            \"lessThan\": \"689bbf48c1f45130086ae1c46ab83ea4c753c601\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"3a07327d10a09379315c844c63f27941f5081e0a\",\n                            \"lessThan\": \"d0f98a3617f6ae5b1e95cde1e68e7ead4a1279ce\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"3a07327d10a09379315c844c63f27941f5081e0a\",\n                            \"lessThan\": \"b6a91f68ebfed9c38e0e9150f58a9b85da07181c\",\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/nft_inner.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"6.2\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"6.2\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.142\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.92\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.34\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.0.11\",\n                            \"lessThanOrEqual\": \"7.0.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.1\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","score":9.1,"severity":"CRITICAL"}],"references":["https://git.kernel.org/stable/c/c161ad9157f5a0429b5ff94d9770faf3bf48d273","https://git.kernel.org/stable/c/870d59e2cf218e7418491e26bad768cb16654582","https://git.kernel.org/stable/c/689bbf48c1f45130086ae1c46ab83ea4c753c601","https://git.kernel.org/stable/c/d0f98a3617f6ae5b1e95cde1e68e7ead4a1279ce","https://git.kernel.org/stable/c/b6a91f68ebfed9c38e0e9150f58a9b85da07181c"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-46244","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-46244","identifiers":["CVE-2026-46244"]},"retained":false,"historicalAffected":[]}],"coverage":[]}