{"schema":"threatline.record/2","record":{"id":"CVE-2026-98102","aliases":[],"summary":"ipv6: mcast: fix RCU list diversion in ip6_mc_del1_src()","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nipv6: mcast: fix RCU list diversion in ip6_mc_del1_src()\n\nWhen removing a source filter whose count reaches zero, ip6_mc_del1_src()\nunlinks psf from pmc->mca_sources. If the filter was previously active,\nthe code moved psf directly into pmc->mca_tomb by updating psf->sf_next.\n\nBecause pmc->mca_sources is traversed locklessly under RCU (e.g. by\nipv6_chk_mcast_addr()), mutating psf->sf_next before a grace period\nelapses diverts concurrent readers to the tombstone list. Consequently,\nreaders miss remaining active sources in pmc->mca_sources and improperly\nexamine deleted tombstone entries.\n\nFix this by allocating a new tombstone node for pmc->mca_tomb (as done\nin sf_setstate()) and retiring the original psf via kfree_rcu().","categories":["Operating systems"],"product":"Linux","vendor":"Linux","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98102","source_modified_at":"2026-10-19T09:13:54.775Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Linux","vendor":"Linux","versions":[{"version":"4b200e398953c237c86d32bf26d4cb2a96556a6f","lessThan":"c3343cd7ec8706c221e52b782f386b9af14a928a","status":"affected","versionType":"git"},{"version":"4b200e398953c237c86d32bf26d4cb2a96556a6f","lessThan":"4352737297b262e8367675c19a7dc6a9f53c97af","status":"affected","versionType":"git"},{"version":"4b200e398953c237c86d32bf26d4cb2a96556a6f","lessThan":"8d4fe5c13f5056faa6deb09a90e24a89f9ebfad4","status":"affected","versionType":"git"},{"version":"4b200e398953c237c86d32bf26d4cb2a96556a6f","lessThan":"5149c60c406595b56fda0c6e9aae7fd287f636aa","status":"affected","versionType":"git"},{"version":"4b200e398953c237c86d32bf26d4cb2a96556a6f","lessThan":"93b49239840b91313adbd77b8b52993eff2d08c1","status":"affected","versionType":"git"},{"version":"86c49119f0353f857cc08030ec9e4ebaab3d5a64","status":"affected","versionType":"git"},{"version":"5.10.261","lessThan":"5.11","status":"affected","versionType":"semver"}],"defaultStatus":"unaffected"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98102","source_modified_at":"2026-10-19T09:13:54.775Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Linux","vendor":"Linux","versions":[{"version":"5.13","status":"affected"},{"version":"0","lessThan":"5.13","status":"unaffected","versionType":"semver"},{"version":"6.6.158","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.111","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.53","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"7.2.7","lessThanOrEqual":"7.2.*","status":"unaffected","versionType":"semver"},{"version":"7.3","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}],"defaultStatus":"affected"}],"fixed_versions":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98102","source_modified_at":"2026-10-19T09:13:54.775Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"4352737297b262e8367675c19a7dc6a9f53c97af","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98102","source_modified_at":"2026-10-19T09:13:54.775Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"8d4fe5c13f5056faa6deb09a90e24a89f9ebfad4","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98102","source_modified_at":"2026-10-19T09:13:54.775Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"5149c60c406595b56fda0c6e9aae7fd287f636aa","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98102","source_modified_at":"2026-10-19T09:13:54.775Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"93b49239840b91313adbd77b8b52993eff2d08c1","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98102","source_modified_at":"2026-10-19T09:13:54.775Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"5.11","basis":"first unaffected version stated in the CVE record"}],"cvss":null,"severity":null,"kev":{"listed":false},"epss":{"probability":0.00168,"percentile":0.0575,"score_date":"2026-10-23"},"published_at":"2026-09-25T10:35:53.332Z","modified_at":"2026-10-19T09:13:54.775Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-98102","fetched_at":"2026-10-23T18:45:31.882637Z","source_modified_at":"2026-10-19T09:13:54.775Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-98102","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://git.kernel.org/stable/c/c3343cd7ec8706c221e52b782f386b9af14a928a"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/4352737297b262e8367675c19a7dc6a9f53c97af"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/8d4fe5c13f5056faa6deb09a90e24a89f9ebfad4"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/5149c60c406595b56fda0c6e9aae7fd287f636aa"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/93b49239840b91313adbd77b8b52993eff2d08c1"}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":"product","confidence":"heuristic","reviewed":false},"change_timestamp":"2026-10-19T09:13:54.775Z","content_hash":"81f94eee003dd599936c4dccbec6fa071a16d5f3bcb508efe2b42bd2f28d0e80"}}