{ "schemaVersion": 1, "attribution": [ { "source": "CISA Known Exploited Vulnerabilities", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog", "licence": "US government work" }, { "source": "GitHub Advisory Database", "url": "https://github.com/advisories", "licence": "CC BY 4.0" }, { "source": "Have I Been Pwned", "url": "https://haveibeenpwned.com/", "licence": "CC BY 4.0" }, { "source": "CVE Program (CVE records)", "url": "https://www.cve.org/Legal/TermsOfUse", "licence": "CVE Terms of Use", "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.", "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy." }, { "source": "FIRST EPSS", "url": "https://www.first.org/epss/", "licence": "free to use; FIRST requests attribution" } ], "record": { "id": "CVE-2026-93226", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-93226", "idYear": 2026, "status": "PUBLISHED", "publishedAt": "2026-09-24T15:28:55.977Z", "updatedAt": "2026-10-19T09:07:37.714Z", "importedAt": "2026-10-24T01:58:35.090Z", "snapshot": { "id": "cve_2026-10-24_midnight_baseline", "at": "2026-10-24T00:00:00.000Z", "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z" }, "facts": { "title": "ipv6: use RCU iterator to dump route exceptions", "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nipv6: use RCU iterator to dump route exceptions\n\nrt6_nh_dump_exceptions() uses hlist_for_each_entry() to iterate over\nRCU-protected exception lists. The caller holds rcu_read_lock(), but does\nnot hold rt6_exception_lock, so rt6_insert_exception() can concurrently\nadd an entry with hlist_add_head_rcu().\n\nKCSAN reports this race (irrelevant details omitted):\n\n ==================================================================\n BUG: KCSAN: data-race in rt6_insert_exception / rt6_nh_dump_exceptions\n\n write (marked) to 0xffff8a7c44c59620 of 8 bytes by interrupt on cpu 5:\n rt6_insert_exception+0x3bb/0x760\n __ip6_rt_update_pmtu+0x4fe/0x750\n ip6_sk_update_pmtu+0x19a/0x3b0\n udpv6_err+0x3ff/0x800\n icmpv6_notify+0x1e1/0x440\n icmpv6_rcv+0x8c0/0xab0\n ip6_protocol_deliver_rcu+0x616/0x840\n ip6_input_finish+0xb9/0x160\n ...\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\n\n read to 0xffff8a7c44c59620 of 8 bytes by task 549 on cpu 14:\n rt6_nh_dump_exceptions+0xb3/0x260\n rt6_dump_route+0x53e/0x5f0\n fib6_dump_node+0x6d/0xf0\n fib6_walk_continue+0x290/0x2d0\n fib6_dump_table+0x28d/0x360\n inet6_dump_fib+0x37d/0x620\n rtnl_dumpit+0x7b/0xd0\n netlink_dump+0x3ae/0x7e0\n ...\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\n\n 4 locks held by dumper/549:\n ...\n #1: (rcu_read_lock){....}-{1:3}, at: inet6_dump_fib+0x88/0x620\n #2: (&tb->tb6_lock){+.-.}-{3:3}, at: fib6_dump_table+0x1e9/0x360\n #3: (rcu_read_lock){....}-{1:3}, at: rt6_dump_route+0x483/0x5f0\n\n value changed: 0xffff8a7c44e05700 -> 0xffff8a7c45d60100\n\n Reported by Kernel Concurrency Sanitizer on:\n CPU: 14 UID: 0 PID: 549 Comm: dumper Not tainted\n 7.2.0-rc7-virtme #38 PREEMPT(lazy)\n ...\n\nUse hlist_for_each_entry_rcu() to safely iterate over the exception list.", "affected": [ { "vendor": "Linux", "product": "Linux", "defaultStatus": "unaffected", "versions": [ { "version": "1e47b4837f3bdaa425727cfe09f5ae3b6c4c41a9", "status": "affected", "versionType": "git", "lessThan": "dffbfb3117138e8e0e09d05f507bd36ca1f696e5" }, { "version": "1e47b4837f3bdaa425727cfe09f5ae3b6c4c41a9", "status": "affected", "versionType": "git", "lessThan": "6bd3f94ed858f2d072627546b4cdf712b0f8ea88" }, { "version": "1e47b4837f3bdaa425727cfe09f5ae3b6c4c41a9", "status": "affected", "versionType": "git", "lessThan": "9c6be625e1a7258e845d6193b3b6b084a00f8e9e" }, { "version": "1e47b4837f3bdaa425727cfe09f5ae3b6c4c41a9", "status": "affected", "versionType": "git", "lessThan": "3665abc3d2ae8a78cb67f858e848481432ec75db" }, { "version": "1e47b4837f3bdaa425727cfe09f5ae3b6c4c41a9", "status": "affected", "versionType": "git", "lessThan": "eda56ee17713f9dd834b922f7dbfa2e25fa6358c" }, { "version": "1e47b4837f3bdaa425727cfe09f5ae3b6c4c41a9", "status": "affected", "versionType": "git", "lessThan": "a602cd128d17a793e12888edc8eda85821ede7e1" }, { "version": "1e47b4837f3bdaa425727cfe09f5ae3b6c4c41a9", "status": "affected", "versionType": "git", "lessThan": "f6b1b15848fd91fe122dac0d19d3d666e35075b6" }, { "version": "1e47b4837f3bdaa425727cfe09f5ae3b6c4c41a9", "status": "affected", "versionType": "git", "lessThan": "47cdab0d51aaa9bd85f8e4904585bd5bd4df4488" } ] }, { "vendor": "Linux", "product": "Linux", "defaultStatus": "affected", "versions": [ { "version": "5.3", "status": "affected" }, { "version": "0", "status": "unaffected", "versionType": "semver", "lessThan": "5.3" }, { "version": "5.10.270", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.10.*" }, { "version": "5.15.221", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.15.*" }, { "version": "6.1.188", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.1.*" }, { "version": "6.6.157", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.6.*" }, { "version": "6.12.109", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.12.*" }, { "version": "6.18.50", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.18.*" }, { "version": "7.2.4", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "7.2.*" }, { "version": "7.3", "status": "unaffected", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*" } ] } ] } } }