{"id":"CVE-2026-43441","revision":null,"records":[{"revision":"b957b814404c4296924e432fe1306bda","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-43441","aliases":[],"title":"net: bonding: Fix nd_tbl NULL dereference when IPv6 is disabled","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: bonding: Fix nd_tbl NULL dereference when IPv6 is disabled\n\nWhen booting with the 'ipv6.disable=1' parameter, the nd_tbl is never\ninitialized because inet6_init() exits before ndisc_init() is called\nwhich initializes it. If bonding ARP/NS validation is enabled, an IPv6\nNS/NA packet received on a slave can reach bond_validate_na(), which\ncalls bond_has_this_ip6(). That path calls ipv6_chk_addr() and can\ncrash in __ipv6_chk_addr_and_flags().\n\n BUG: kernel NULL pointer dereference, address: 00000000000005d8\n Oops: Oops: 0000 [#1] SMP NOPTI\n RIP: 0010:__ipv6_chk_addr_and_flags+0x69/0x170\n Call Trace:\n \n ipv6_chk_addr+0x1f/0x30\n bond_validate_na+0x12e/0x1d0 [bonding]\n ? __pfx_bond_handle_frame+0x10/0x10 [bonding]\n bond_rcv_validate+0x1a0/0x450 [bonding]\n bond_handle_frame+0x5e/0x290 [bonding]\n ? srso_alias_return_thunk+0x5/0xfbef5\n __netif_receive_skb_core.constprop.0+0x3e8/0xe50\n ? srso_alias_return_thunk+0x5/0xfbef5\n ? update_cfs_rq_load_avg+0x1a/0x240\n ? srso_alias_return_thunk+0x5/0xfbef5\n ? __enqueue_entity+0x5e/0x240\n __netif_receive_skb_one_core+0x39/0xa0\n process_backlog+0x9c/0x150\n __napi_poll+0x30/0x200\n ? srso_alias_return_thunk+0x5/0xfbef5\n net_rx_action+0x338/0x3b0\n handle_softirqs+0xc9/0x2a0\n do_softirq+0x42/0x60\n \n \n __local_bh_enable_ip+0x62/0x70\n __dev_queue_xmit+0x2d3/0x1000\n ? srso_alias_return_thunk+0x5/0xfbef5\n ? srso_alias_return_thunk+0x5/0xfbef5\n ? packet_parse_headers+0x10a/0x1a0\n packet_sendmsg+0x10da/0x1700\n ? kick_pool+0x5f/0x140\n ? srso_alias_return_thunk+0x5/0xfbef5\n ? __queue_work+0x12d/0x4f0\n __sys_sendto+0x1f3/0x220\n __x64_sys_sendto+0x24/0x30\n do_syscall_64+0x101/0xf80\n ? exc_page_fault+0x6e/0x170\n ? srso_alias_return_thunk+0x5/0xfbef5\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\n \n\nFix this by checking ipv6_mod_enabled() before dispatching IPv6 packets to\nbond_na_rcv(). If IPv6 is disabled, return early from bond_rcv_validate()\nand avoid the path to ipv6_chk_addr().","state":0,"publishedAt":"2026-05-08T14:22:09.982+00:00","modifiedAt":"2026-10-19T19:26:36.805+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n \"product\": \"Linux\",\n \"vendor\": \"Linux\",\n \"defaultStatus\": \"unaffected\",\n \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n \"programFiles\": [\n \"drivers/net/bonding/bond_main.c\"\n ],\n \"versions\": [\n {\n \"version\": \"4e24be018eb9dbcefa4b01c07e298b147dc1a4d7\",\n \"lessThan\": \"49dbfcb70eca5f6f9043594e1e323c74c39e3863\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"4e24be018eb9dbcefa4b01c07e298b147dc1a4d7\",\n \"lessThan\": \"cf6099ef493b94e140b0fad52482a78853115318\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"4e24be018eb9dbcefa4b01c07e298b147dc1a4d7\",\n \"lessThan\": \"c78f01abe535853f13f0b26cd5b1d2f19bf52e2f\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"4e24be018eb9dbcefa4b01c07e298b147dc1a4d7\",\n \"lessThan\": \"95faa1459b83fa544191e82ccc73856f03b7741f\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"4e24be018eb9dbcefa4b01c07e298b147dc1a4d7\",\n \"lessThan\": \"c9c238066fb254dabf65e27379f93c56112c5b96\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"4e24be018eb9dbcefa4b01c07e298b147dc1a4d7\",\n \"lessThan\": \"30021e969d48e5819d5ae56936c2f34c0f7ce997\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n }\n ]\n }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n \"product\": \"Linux\",\n \"vendor\": \"Linux\",\n \"defaultStatus\": \"affected\",\n \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n \"programFiles\": [\n \"drivers/net/bonding/bond_main.c\"\n ],\n \"versions\": [\n {\n \"version\": \"5.18\",\n \"status\": \"affected\"\n },\n {\n \"version\": \"0\",\n \"lessThan\": \"5.18\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.1.167\",\n \"lessThanOrEqual\": \"6.1.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.6.130\",\n \"lessThanOrEqual\": \"6.6.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.12.78\",\n \"lessThanOrEqual\": \"6.12.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.18.19\",\n \"lessThanOrEqual\": \"6.18.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.19.9\",\n \"lessThanOrEqual\": \"6.19.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"7.0\",\n \"lessThanOrEqual\": \"*\",\n \"status\": \"unaffected\",\n \"versionType\": \"original_commit_for_fix\"\n }\n ]\n }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/49dbfcb70eca5f6f9043594e1e323c74c39e3863","https://git.kernel.org/stable/c/cf6099ef493b94e140b0fad52482a78853115318","https://git.kernel.org/stable/c/c78f01abe535853f13f0b26cd5b1d2f19bf52e2f","https://git.kernel.org/stable/c/95faa1459b83fa544191e82ccc73856f03b7741f","https://git.kernel.org/stable/c/c9c238066fb254dabf65e27379f93c56112c5b96","https://git.kernel.org/stable/c/30021e969d48e5819d5ae56936c2f34c0f7ce997"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-43441","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-43441","identifiers":["CVE-2026-43441"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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