{"api_version":"1","generated_at":"2026-10-23T01:16:44+00:00","cve":"CVE-2026-98485","urls":{"html":"https://cve.report/CVE-2026-98485","api":"https://cve.report/api/cve/CVE-2026-98485.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-98485","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-98485"},"summary":{"title":"netfilter: ip6t_rt: fix zero-address non-strict match out-of-bounds read","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: ip6t_rt: fix zero-address non-strict match out-of-bounds read\n\nrt_mt6_check() permits rules to be configured with rtinfo->addrnr == 0\neven when address matching (IP6T_RT_FST_MASK) is requested.\n\nIn the IP6T_RT_FST_NSTRICT path, rt_mt6() evaluates packet routing\naddresses against rtinfo->addrs[i] and terminates backwards at the bottom\nof the loop:\n\n    if (ipv6_addr_equal(ap, &rtinfo->addrs[i])) {\n        i++;\n    }\n    if (i == rtinfo->addrnr)\n        break;\n\nWhen addrnr is 0, if the first packet address matches rtinfo->addrs[0],\ni is incremented to 1. Because i is now strictly greater than addrnr (0),\nthe loop termination condition (i == rtinfo->addrnr) is bypassed and will\nnever be satisfied.\n\nIf a crafted IPv6 packet contains matching routing addresses, i will\nadvance past IP6T_RT_HOPS (16). The subsequent call to ipv6_addr_equal()\nreads beyond struct ip6t_rt, triggering UBSAN/KASAN out-of-bounds warnings\nor kernel panics.\n\nFix this by:\n1. Rejecting rules in rt_mt6_check() where IP6T_RT_FST_MASK is set but\n   rtinfo->addrnr is zero.\n2. In rt_mt6(), moving the termination condition (i < rtinfo->addrnr)\n   into the for-loop header condition and removing the backwards break\n   at the end of the loop body.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-10-18 16:16:59","updated_at":"2026-10-19 10:18:59"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/959d1829d1ce8b91b435b24a923b51bcc8897090","name":"https://git.kernel.org/stable/c/959d1829d1ce8b91b435b24a923b51bcc8897090","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/b89249819a7d6698bed152feafd3bc6c08489d15","name":"https://git.kernel.org/stable/c/b89249819a7d6698bed152feafd3bc6c08489d15","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/82313c169eddc02b1bf5ba6b427803e272d3ec42","name":"https://git.kernel.org/stable/c/82313c169eddc02b1bf5ba6b427803e272d3ec42","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/fe336bab13834394320997de8b16ca4a913b4f13","name":"https://git.kernel.org/stable/c/fe336bab13834394320997de8b16ca4a913b4f13","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/5a54f8b7f7fe207a5c14713015a5820588faf1ad","name":"https://git.kernel.org/stable/c/5a54f8b7f7fe207a5c14713015a5820588faf1ad","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/191239b0939692e92459d8d32cad14247fa93f89","name":"https://git.kernel.org/stable/c/191239b0939692e92459d8d32cad14247fa93f89","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/d9cf4ac6f326330e1fe4d95671d36a6ff3593f64","name":"https://git.kernel.org/stable/c/d9cf4ac6f326330e1fe4d95671d36a6ff3593f64","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/dd55c0ea87bf70e4e4b3b683acd29ef981335b26","name":"https://git.kernel.org/stable/c/dd55c0ea87bf70e4e4b3b683acd29ef981335b26","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-98485","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-98485","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 959d1829d1ce8b91b435b24a923b51bcc8897090 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 fe336bab13834394320997de8b16ca4a913b4f13 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 5a54f8b7f7fe207a5c14713015a5820588faf1ad git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 b89249819a7d6698bed152feafd3bc6c08489d15 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 dd55c0ea87bf70e4e4b3b683acd29ef981335b26 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 191239b0939692e92459d8d32cad14247fa93f89 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 d9cf4ac6f326330e1fe4d95671d36a6ff3593f64 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 82313c169eddc02b1bf5ba6b427803e272d3ec42 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 2.6.12","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 2.6.12 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.10.271 5.10.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.15.222 5.15.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.189 6.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.158 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.112 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.55 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2.9 7.2.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.3 * 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/ipv6/netfilter/ip6t_rt.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"959d1829d1ce8b91b435b24a923b51bcc8897090","status":"affected","version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","versionType":"git"},{"lessThan":"fe336bab13834394320997de8b16ca4a913b4f13","status":"affected","version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","versionType":"git"},{"lessThan":"5a54f8b7f7fe207a5c14713015a5820588faf1ad","status":"affected","version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","versionType":"git"},{"lessThan":"b89249819a7d6698bed152feafd3bc6c08489d15","status":"affected","version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","versionType":"git"},{"lessThan":"dd55c0ea87bf70e4e4b3b683acd29ef981335b26","status":"affected","version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","versionType":"git"},{"lessThan":"191239b0939692e92459d8d32cad14247fa93f89","status":"affected","version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","versionType":"git"},{"lessThan":"d9cf4ac6f326330e1fe4d95671d36a6ff3593f64","status":"affected","version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","versionType":"git"},{"lessThan":"82313c169eddc02b1bf5ba6b427803e272d3ec42","status":"affected","version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["net/ipv6/netfilter/ip6t_rt.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"2.6.12"},{"lessThan":"2.6.12","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.10.*","status":"unaffected","version":"5.10.271","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.222","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.189","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.158","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.112","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.55","versionType":"semver"},{"lessThanOrEqual":"7.2.*","status":"unaffected","version":"7.2.9","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.3","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.10.271","versionStartIncluding":"2.6.12","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.15.222","versionStartIncluding":"2.6.12","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.189","versionStartIncluding":"2.6.12","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.158","versionStartIncluding":"2.6.12","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.112","versionStartIncluding":"2.6.12","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.55","versionStartIncluding":"2.6.12","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2.9","versionStartIncluding":"2.6.12","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.3","versionStartIncluding":"2.6.12","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: ip6t_rt: fix zero-address non-strict match out-of-bounds read\n\nrt_mt6_check() permits rules to be configured with rtinfo->addrnr == 0\neven when address matching (IP6T_RT_FST_MASK) is requested.\n\nIn the IP6T_RT_FST_NSTRICT path, rt_mt6() evaluates packet routing\naddresses against rtinfo->addrs[i] and terminates backwards at the bottom\nof the loop:\n\n    if (ipv6_addr_equal(ap, &rtinfo->addrs[i])) {\n        i++;\n    }\n    if (i == rtinfo->addrnr)\n        break;\n\nWhen addrnr is 0, if the first packet address matches rtinfo->addrs[0],\ni is incremented to 1. Because i is now strictly greater than addrnr (0),\nthe loop termination condition (i == rtinfo->addrnr) is bypassed and will\nnever be satisfied.\n\nIf a crafted IPv6 packet contains matching routing addresses, i will\nadvance past IP6T_RT_HOPS (16). The subsequent call to ipv6_addr_equal()\nreads beyond struct ip6t_rt, triggering UBSAN/KASAN out-of-bounds warnings\nor kernel panics.\n\nFix this by:\n1. Rejecting rules in rt_mt6_check() where IP6T_RT_FST_MASK is set but\n   rtinfo->addrnr is zero.\n2. In rt_mt6(), moving the termination condition (i < rtinfo->addrnr)\n   into the for-loop header condition and removing the backwards break\n   at the end of the loop body."}],"providerMetadata":{"dateUpdated":"2026-10-19T09:20:22.585Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/959d1829d1ce8b91b435b24a923b51bcc8897090"},{"url":"https://git.kernel.org/stable/c/fe336bab13834394320997de8b16ca4a913b4f13"},{"url":"https://git.kernel.org/stable/c/5a54f8b7f7fe207a5c14713015a5820588faf1ad"},{"url":"https://git.kernel.org/stable/c/b89249819a7d6698bed152feafd3bc6c08489d15"},{"url":"https://git.kernel.org/stable/c/dd55c0ea87bf70e4e4b3b683acd29ef981335b26"},{"url":"https://git.kernel.org/stable/c/191239b0939692e92459d8d32cad14247fa93f89"},{"url":"https://git.kernel.org/stable/c/d9cf4ac6f326330e1fe4d95671d36a6ff3593f64"},{"url":"https://git.kernel.org/stable/c/82313c169eddc02b1bf5ba6b427803e272d3ec42"}],"title":"netfilter: ip6t_rt: fix zero-address non-strict match out-of-bounds read","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-98485","datePublished":"2026-10-18T15:16:00.435Z","dateReserved":"2026-09-25T10:25:14.352Z","dateUpdated":"2026-10-19T09:20:22.585Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-10-18 16:16:59","lastModifiedDate":"2026-10-19 10:18:59","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"98485","Ordinal":"1","Title":"netfilter: ip6t_rt: fix zero-address non-strict match out-of-bou","CVE":"CVE-2026-98485","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"98485","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: ip6t_rt: fix zero-address non-strict match out-of-bounds read\n\nrt_mt6_check() permits rules to be configured with rtinfo->addrnr == 0\neven when address matching (IP6T_RT_FST_MASK) is requested.\n\nIn the IP6T_RT_FST_NSTRICT path, rt_mt6() evaluates packet routing\naddresses against rtinfo->addrs[i] and terminates backwards at the bottom\nof the loop:\n\n    if (ipv6_addr_equal(ap, &rtinfo->addrs[i])) {\n        i++;\n    }\n    if (i == rtinfo->addrnr)\n        break;\n\nWhen addrnr is 0, if the first packet address matches rtinfo->addrs[0],\ni is incremented to 1. Because i is now strictly greater than addrnr (0),\nthe loop termination condition (i == rtinfo->addrnr) is bypassed and will\nnever be satisfied.\n\nIf a crafted IPv6 packet contains matching routing addresses, i will\nadvance past IP6T_RT_HOPS (16). The subsequent call to ipv6_addr_equal()\nreads beyond struct ip6t_rt, triggering UBSAN/KASAN out-of-bounds warnings\nor kernel panics.\n\nFix this by:\n1. Rejecting rules in rt_mt6_check() where IP6T_RT_FST_MASK is set but\n   rtinfo->addrnr is zero.\n2. In rt_mt6(), moving the termination condition (i < rtinfo->addrnr)\n   into the for-loop header condition and removing the backwards break\n   at the end of the loop body.","Type":"Description","Title":"netfilter: ip6t_rt: fix zero-address non-strict match out-of-bou"}]}}}