{"api_version":"1","generated_at":"2026-10-01T08:34:57+00:00","cve":"CVE-2026-93226","urls":{"html":"https://cve.report/CVE-2026-93226","api":"https://cve.report/api/cve/CVE-2026-93226.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-93226","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-93226"},"summary":{"title":"ipv6: use RCU iterator to dump route exceptions","description":"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.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-09-24 16:17:17","updated_at":"2026-09-24 16:17:17"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/a602cd128d17a793e12888edc8eda85821ede7e1","name":"https://git.kernel.org/stable/c/a602cd128d17a793e12888edc8eda85821ede7e1","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/6bd3f94ed858f2d072627546b4cdf712b0f8ea88","name":"https://git.kernel.org/stable/c/6bd3f94ed858f2d072627546b4cdf712b0f8ea88","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/3665abc3d2ae8a78cb67f858e848481432ec75db","name":"https://git.kernel.org/stable/c/3665abc3d2ae8a78cb67f858e848481432ec75db","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/f6b1b15848fd91fe122dac0d19d3d666e35075b6","name":"https://git.kernel.org/stable/c/f6b1b15848fd91fe122dac0d19d3d666e35075b6","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/9c6be625e1a7258e845d6193b3b6b084a00f8e9e","name":"https://git.kernel.org/stable/c/9c6be625e1a7258e845d6193b3b6b084a00f8e9e","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/eda56ee17713f9dd834b922f7dbfa2e25fa6358c","name":"https://git.kernel.org/stable/c/eda56ee17713f9dd834b922f7dbfa2e25fa6358c","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/dffbfb3117138e8e0e09d05f507bd36ca1f696e5","name":"https://git.kernel.org/stable/c/dffbfb3117138e8e0e09d05f507bd36ca1f696e5","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/47cdab0d51aaa9bd85f8e4904585bd5bd4df4488","name":"https://git.kernel.org/stable/c/47cdab0d51aaa9bd85f8e4904585bd5bd4df4488","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-93226","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-93226","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1e47b4837f3bdaa425727cfe09f5ae3b6c4c41a9 dffbfb3117138e8e0e09d05f507bd36ca1f696e5 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1e47b4837f3bdaa425727cfe09f5ae3b6c4c41a9 6bd3f94ed858f2d072627546b4cdf712b0f8ea88 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1e47b4837f3bdaa425727cfe09f5ae3b6c4c41a9 9c6be625e1a7258e845d6193b3b6b084a00f8e9e git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1e47b4837f3bdaa425727cfe09f5ae3b6c4c41a9 3665abc3d2ae8a78cb67f858e848481432ec75db git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1e47b4837f3bdaa425727cfe09f5ae3b6c4c41a9 eda56ee17713f9dd834b922f7dbfa2e25fa6358c git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1e47b4837f3bdaa425727cfe09f5ae3b6c4c41a9 a602cd128d17a793e12888edc8eda85821ede7e1 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1e47b4837f3bdaa425727cfe09f5ae3b6c4c41a9 f6b1b15848fd91fe122dac0d19d3d666e35075b6 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1e47b4837f3bdaa425727cfe09f5ae3b6c4c41a9 47cdab0d51aaa9bd85f8e4904585bd5bd4df4488 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5.3","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.3 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.10.270 5.10.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.15.221 5.15.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.188 6.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.157 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.109 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.50 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2.4 7.2.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.3-rc1 * 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/route.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"dffbfb3117138e8e0e09d05f507bd36ca1f696e5","status":"affected","version":"1e47b4837f3bdaa425727cfe09f5ae3b6c4c41a9","versionType":"git"},{"lessThan":"6bd3f94ed858f2d072627546b4cdf712b0f8ea88","status":"affected","version":"1e47b4837f3bdaa425727cfe09f5ae3b6c4c41a9","versionType":"git"},{"lessThan":"9c6be625e1a7258e845d6193b3b6b084a00f8e9e","status":"affected","version":"1e47b4837f3bdaa425727cfe09f5ae3b6c4c41a9","versionType":"git"},{"lessThan":"3665abc3d2ae8a78cb67f858e848481432ec75db","status":"affected","version":"1e47b4837f3bdaa425727cfe09f5ae3b6c4c41a9","versionType":"git"},{"lessThan":"eda56ee17713f9dd834b922f7dbfa2e25fa6358c","status":"affected","version":"1e47b4837f3bdaa425727cfe09f5ae3b6c4c41a9","versionType":"git"},{"lessThan":"a602cd128d17a793e12888edc8eda85821ede7e1","status":"affected","version":"1e47b4837f3bdaa425727cfe09f5ae3b6c4c41a9","versionType":"git"},{"lessThan":"f6b1b15848fd91fe122dac0d19d3d666e35075b6","status":"affected","version":"1e47b4837f3bdaa425727cfe09f5ae3b6c4c41a9","versionType":"git"},{"lessThan":"47cdab0d51aaa9bd85f8e4904585bd5bd4df4488","status":"affected","version":"1e47b4837f3bdaa425727cfe09f5ae3b6c4c41a9","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["net/ipv6/route.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"5.3"},{"lessThan":"5.3","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.10.*","status":"unaffected","version":"5.10.270","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.221","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.188","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.157","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.109","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.50","versionType":"semver"},{"lessThanOrEqual":"7.2.*","status":"unaffected","version":"7.2.4","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.3-rc1","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.10.270","versionStartIncluding":"5.3","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.15.221","versionStartIncluding":"5.3","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.188","versionStartIncluding":"5.3","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.157","versionStartIncluding":"5.3","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.109","versionStartIncluding":"5.3","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.50","versionStartIncluding":"5.3","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2.4","versionStartIncluding":"5.3","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.3-rc1","versionStartIncluding":"5.3","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"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."}],"providerMetadata":{"dateUpdated":"2026-09-24T15:28:55.977Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/dffbfb3117138e8e0e09d05f507bd36ca1f696e5"},{"url":"https://git.kernel.org/stable/c/6bd3f94ed858f2d072627546b4cdf712b0f8ea88"},{"url":"https://git.kernel.org/stable/c/9c6be625e1a7258e845d6193b3b6b084a00f8e9e"},{"url":"https://git.kernel.org/stable/c/3665abc3d2ae8a78cb67f858e848481432ec75db"},{"url":"https://git.kernel.org/stable/c/eda56ee17713f9dd834b922f7dbfa2e25fa6358c"},{"url":"https://git.kernel.org/stable/c/a602cd128d17a793e12888edc8eda85821ede7e1"},{"url":"https://git.kernel.org/stable/c/f6b1b15848fd91fe122dac0d19d3d666e35075b6"},{"url":"https://git.kernel.org/stable/c/47cdab0d51aaa9bd85f8e4904585bd5bd4df4488"}],"title":"ipv6: use RCU iterator to dump route exceptions","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-93226","datePublished":"2026-09-24T15:28:55.977Z","dateReserved":"2026-09-17T16:02:15.094Z","dateUpdated":"2026-09-24T15:28:55.977Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-09-24 16:17:17","lastModifiedDate":"2026-09-24 16:17:17","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"93226","Ordinal":"1","Title":"ipv6: use RCU iterator to dump route exceptions","CVE":"CVE-2026-93226","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"93226","Ordinal":"1","NoteData":"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.","Type":"Description","Title":"ipv6: use RCU iterator to dump route exceptions"}]}}}