{"api_version":"1","generated_at":"2026-08-22T02:51:21+00:00","cve":"CVE-2026-74581","urls":{"html":"https://cve.report/CVE-2026-74581","api":"https://cve.report/api/cve/CVE-2026-74581.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-74581","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-74581"},"summary":{"title":"net: ipv6: clear suppressed fib6 rule result","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: ipv6: clear suppressed fib6 rule result\n\nfib6_rule_suppress() drops a suppressed route with ip6_rt_put_flags(),\nbut leaves res->rt6 pointing at the released rt6_info.\n\nIf no later rule supplies a replacement, fib6_rule_lookup() still sees\nres.rt6 and returns that stale dst to its caller. A suppressing rule can\ntherefore leak a released route back to rt6_lookup(), and the next put\nhits rcuref_put_slowpath() from dst_release().\n\nClear res->rt6 when suppressing the route so suppressed lookups fall\nthrough to the null dst instead of reusing the released one.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-08-21 17:16:44","updated_at":"2026-08-21 17:16:44"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/354db6243eca59e9d187ffbf8b7955b044ce84dc","name":"https://git.kernel.org/stable/c/354db6243eca59e9d187ffbf8b7955b044ce84dc","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/a341c091ca0bfae377747b1b59a3bd8ebe18a937","name":"https://git.kernel.org/stable/c/a341c091ca0bfae377747b1b59a3bd8ebe18a937","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/5d29b286c9de0b309e94b9ed083aa1a2f429434f","name":"https://git.kernel.org/stable/c/5d29b286c9de0b309e94b9ed083aa1a2f429434f","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/6d98c70fe0ba8c7708bfd5b2a5174d2086775daa","name":"https://git.kernel.org/stable/c/6d98c70fe0ba8c7708bfd5b2a5174d2086775daa","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/9bad152c42b37499162367fe47867411e62fffa3","name":"https://git.kernel.org/stable/c/9bad152c42b37499162367fe47867411e62fffa3","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/6aea62e433fe1b586202a5fee8b5807ce635e1d7","name":"https://git.kernel.org/stable/c/6aea62e433fe1b586202a5fee8b5807ce635e1d7","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/dc3ab04220667f254f4348572b2a0b3febff89fb","name":"https://git.kernel.org/stable/c/dc3ab04220667f254f4348572b2a0b3febff89fb","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/90c57310e266eb94e4a80d6b15a9ca131d2e82cb","name":"https://git.kernel.org/stable/c/90c57310e266eb94e4a80d6b15a9ca131d2e82cb","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-74581","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-74581","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 209d35ee34e25f9668c404350a1c86d914c54ffa 90c57310e266eb94e4a80d6b15a9ca131d2e82cb git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 8ef8a76a340ebdb2c2eea3f6fb0ebbed09a16383 5d29b286c9de0b309e94b9ed083aa1a2f429434f git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected cdef485217d30382f3bf6448c54b4401648fe3f1 354db6243eca59e9d187ffbf8b7955b044ce84dc git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected cdef485217d30382f3bf6448c54b4401648fe3f1 6d98c70fe0ba8c7708bfd5b2a5174d2086775daa git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 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semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5.4.164 5.5 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5.16","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.16 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.10.265 5.10.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.15.216 5.15.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.183 6.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.151 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.103 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.44 6.18.* 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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/fib6_rules.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"90c57310e266eb94e4a80d6b15a9ca131d2e82cb","status":"affected","version":"209d35ee34e25f9668c404350a1c86d914c54ffa","versionType":"git"},{"lessThan":"5d29b286c9de0b309e94b9ed083aa1a2f429434f","status":"affected","version":"8ef8a76a340ebdb2c2eea3f6fb0ebbed09a16383","versionType":"git"},{"lessThan":"354db6243eca59e9d187ffbf8b7955b044ce84dc","status":"affected","version":"cdef485217d30382f3bf6448c54b4401648fe3f1","versionType":"git"},{"lessThan":"6d98c70fe0ba8c7708bfd5b2a5174d2086775daa","status":"affected","version":"cdef485217d30382f3bf6448c54b4401648fe3f1","versionType":"git"},{"lessThan":"9bad152c42b37499162367fe47867411e62fffa3","status":"affected","version":"cdef485217d30382f3bf6448c54b4401648fe3f1","versionType":"git"},{"lessThan":"dc3ab04220667f254f4348572b2a0b3febff89fb","status":"affected","version":"cdef485217d30382f3bf6448c54b4401648fe3f1","versionType":"git"},{"lessThan":"a341c091ca0bfae377747b1b59a3bd8ebe18a937","status":"affected","version":"cdef485217d30382f3bf6448c54b4401648fe3f1","versionType":"git"},{"lessThan":"6aea62e433fe1b586202a5fee8b5807ce635e1d7","status":"affected","version":"cdef485217d30382f3bf6448c54b4401648fe3f1","versionType":"git"},{"status":"affected","version":"ee38eb8cf9a7323884c2b8e0adbbeb2192d31e29","versionType":"git"},{"lessThan":"5.10.265","status":"affected","version":"5.10.84","versionType":"semver"},{"lessThan":"5.15.216","status":"affected","version":"5.15.7","versionType":"semver"},{"lessThan":"5.5","status":"affected","version":"5.4.164","versionType":"semver"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["net/ipv6/fib6_rules.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"5.16"},{"lessThan":"5.16","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.10.*","status":"unaffected","version":"5.10.265","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.216","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.183","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.151","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.103","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.44","versionType":"semver"},{"lessThanOrEqual":"7.1.*","status":"unaffected","version":"7.1.8","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.2","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.10.265","versionStartIncluding":"5.10.84","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.15.216","versionStartIncluding":"5.15.7","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.183","versionStartIncluding":"5.16","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.151","versionStartIncluding":"5.16","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.103","versionStartIncluding":"5.16","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.44","versionStartIncluding":"5.16","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1.8","versionStartIncluding":"5.16","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2","versionStartIncluding":"5.16","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.4.164","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: ipv6: clear suppressed fib6 rule result\n\nfib6_rule_suppress() drops a suppressed route with ip6_rt_put_flags(),\nbut leaves res->rt6 pointing at the released rt6_info.\n\nIf no later rule supplies a replacement, fib6_rule_lookup() still sees\nres.rt6 and returns that stale dst to its caller. A suppressing rule can\ntherefore leak a released route back to rt6_lookup(), and the next put\nhits rcuref_put_slowpath() from dst_release().\n\nClear res->rt6 when suppressing the route so suppressed lookups fall\nthrough to the null dst instead of reusing the released one."}],"providerMetadata":{"dateUpdated":"2026-08-21T16:31:54.683Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/90c57310e266eb94e4a80d6b15a9ca131d2e82cb"},{"url":"https://git.kernel.org/stable/c/5d29b286c9de0b309e94b9ed083aa1a2f429434f"},{"url":"https://git.kernel.org/stable/c/354db6243eca59e9d187ffbf8b7955b044ce84dc"},{"url":"https://git.kernel.org/stable/c/6d98c70fe0ba8c7708bfd5b2a5174d2086775daa"},{"url":"https://git.kernel.org/stable/c/9bad152c42b37499162367fe47867411e62fffa3"},{"url":"https://git.kernel.org/stable/c/dc3ab04220667f254f4348572b2a0b3febff89fb"},{"url":"https://git.kernel.org/stable/c/a341c091ca0bfae377747b1b59a3bd8ebe18a937"},{"url":"https://git.kernel.org/stable/c/6aea62e433fe1b586202a5fee8b5807ce635e1d7"}],"title":"net: ipv6: clear suppressed fib6 rule result","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-74581","datePublished":"2026-08-21T16:31:54.683Z","dateReserved":"2026-08-15T05:44:03.918Z","dateUpdated":"2026-08-21T16:31:54.683Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-08-21 17:16:44","lastModifiedDate":"2026-08-21 17:16:44","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"74581","Ordinal":"1","Title":"net: ipv6: clear suppressed fib6 rule result","CVE":"CVE-2026-74581","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"74581","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: ipv6: clear suppressed fib6 rule result\n\nfib6_rule_suppress() drops a suppressed route with ip6_rt_put_flags(),\nbut leaves res->rt6 pointing at the released rt6_info.\n\nIf no later rule supplies a replacement, fib6_rule_lookup() still sees\nres.rt6 and returns that stale dst to its caller. A suppressing rule can\ntherefore leak a released route back to rt6_lookup(), and the next put\nhits rcuref_put_slowpath() from dst_release().\n\nClear res->rt6 when suppressing the route so suppressed lookups fall\nthrough to the null dst instead of reusing the released one.","Type":"Description","Title":"net: ipv6: clear suppressed fib6 rule result"}]}}}