{"api_version":"1","generated_at":"2026-06-04T17:42:22+00:00","cve":"CVE-2026-46244","urls":{"html":"https://cve.report/CVE-2026-46244","api":"https://cve.report/api/cve/CVE-2026-46244.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-46244","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-46244"},"summary":{"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":"PUBLISHED","assigner":"Linux","published_at":"2026-06-03 18:16:24","updated_at":"2026-06-03 18:16:24"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/d0f98a3617f6ae5b1e95cde1e68e7ead4a1279ce","name":"https://git.kernel.org/stable/c/d0f98a3617f6ae5b1e95cde1e68e7ead4a1279ce","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/689bbf48c1f45130086ae1c46ab83ea4c753c601","name":"https://git.kernel.org/stable/c/689bbf48c1f45130086ae1c46ab83ea4c753c601","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/b6a91f68ebfed9c38e0e9150f58a9b85da07181c","name":"https://git.kernel.org/stable/c/b6a91f68ebfed9c38e0e9150f58a9b85da07181c","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/870d59e2cf218e7418491e26bad768cb16654582","name":"https://git.kernel.org/stable/c/870d59e2cf218e7418491e26bad768cb16654582","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/c161ad9157f5a0429b5ff94d9770faf3bf48d273","name":"https://git.kernel.org/stable/c/c161ad9157f5a0429b5ff94d9770faf3bf48d273","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-46244","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-46244","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 3a07327d10a09379315c844c63f27941f5081e0a c161ad9157f5a0429b5ff94d9770faf3bf48d273 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 3a07327d10a09379315c844c63f27941f5081e0a 870d59e2cf218e7418491e26bad768cb16654582 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 3a07327d10a09379315c844c63f27941f5081e0a 689bbf48c1f45130086ae1c46ab83ea4c753c601 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 3a07327d10a09379315c844c63f27941f5081e0a d0f98a3617f6ae5b1e95cde1e68e7ead4a1279ce git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 3a07327d10a09379315c844c63f27941f5081e0a b6a91f68ebfed9c38e0e9150f58a9b85da07181c git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.2","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.2 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.142 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.92 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.34 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.0.11 7.0.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1-rc5 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["net/netfilter/nft_inner.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"c161ad9157f5a0429b5ff94d9770faf3bf48d273","status":"affected","version":"3a07327d10a09379315c844c63f27941f5081e0a","versionType":"git"},{"lessThan":"870d59e2cf218e7418491e26bad768cb16654582","status":"affected","version":"3a07327d10a09379315c844c63f27941f5081e0a","versionType":"git"},{"lessThan":"689bbf48c1f45130086ae1c46ab83ea4c753c601","status":"affected","version":"3a07327d10a09379315c844c63f27941f5081e0a","versionType":"git"},{"lessThan":"d0f98a3617f6ae5b1e95cde1e68e7ead4a1279ce","status":"affected","version":"3a07327d10a09379315c844c63f27941f5081e0a","versionType":"git"},{"lessThan":"b6a91f68ebfed9c38e0e9150f58a9b85da07181c","status":"affected","version":"3a07327d10a09379315c844c63f27941f5081e0a","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["net/netfilter/nft_inner.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.2"},{"lessThan":"6.2","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.142","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.92","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.34","versionType":"semver"},{"lessThanOrEqual":"7.0.*","status":"unaffected","version":"7.0.11","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.1-rc5","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.142","versionStartIncluding":"6.2","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.92","versionStartIncluding":"6.2","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.34","versionStartIncluding":"6.2","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.0.11","versionStartIncluding":"6.2","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1-rc5","versionStartIncluding":"6.2","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"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."}],"providerMetadata":{"dateUpdated":"2026-06-03T15:48:59.049Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/c161ad9157f5a0429b5ff94d9770faf3bf48d273"},{"url":"https://git.kernel.org/stable/c/870d59e2cf218e7418491e26bad768cb16654582"},{"url":"https://git.kernel.org/stable/c/689bbf48c1f45130086ae1c46ab83ea4c753c601"},{"url":"https://git.kernel.org/stable/c/d0f98a3617f6ae5b1e95cde1e68e7ead4a1279ce"},{"url":"https://git.kernel.org/stable/c/b6a91f68ebfed9c38e0e9150f58a9b85da07181c"}],"title":"netfilter: nft_inner: Fix IPv6 inner_thoff desync","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-46244","datePublished":"2026-06-03T15:48:59.049Z","dateReserved":"2026-05-13T15:03:33.107Z","dateUpdated":"2026-06-03T15:48:59.049Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-06-03 18:16:24","lastModifiedDate":"2026-06-03 18:16:24","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"46244","Ordinal":"1","Title":"netfilter: nft_inner: Fix IPv6 inner_thoff desync","CVE":"CVE-2026-46244","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"46244","Ordinal":"1","NoteData":"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.","Type":"Description","Title":"netfilter: nft_inner: Fix IPv6 inner_thoff desync"}]}}}