{"api_version":"1","generated_at":"2026-05-11T11:03:34+00:00","cve":"CVE-2026-43441","urls":{"html":"https://cve.report/CVE-2026-43441","api":"https://cve.report/api/cve/CVE-2026-43441.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-43441","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-43441"},"summary":{"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  <IRQ>\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  </IRQ>\n  <TASK>\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  </TASK>\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":"PUBLISHED","assigner":"Linux","published_at":"2026-05-08 15:16:56","updated_at":"2026-05-11 08:16:14"},"problem_types":[],"metrics":[{"version":"3.1","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","score":"7.5","severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","data":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","baseScore":7.5,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"}},{"version":"3.1","source":"CNA","type":"DECLARED","score":"7.5","severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","data":{"baseScore":7.5,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"}}],"references":[{"url":"https://git.kernel.org/stable/c/49dbfcb70eca5f6f9043594e1e323c74c39e3863","name":"https://git.kernel.org/stable/c/49dbfcb70eca5f6f9043594e1e323c74c39e3863","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/c78f01abe535853f13f0b26cd5b1d2f19bf52e2f","name":"https://git.kernel.org/stable/c/c78f01abe535853f13f0b26cd5b1d2f19bf52e2f","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/95faa1459b83fa544191e82ccc73856f03b7741f","name":"https://git.kernel.org/stable/c/95faa1459b83fa544191e82ccc73856f03b7741f","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/cf6099ef493b94e140b0fad52482a78853115318","name":"https://git.kernel.org/stable/c/cf6099ef493b94e140b0fad52482a78853115318","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/c9c238066fb254dabf65e27379f93c56112c5b96","name":"https://git.kernel.org/stable/c/c9c238066fb254dabf65e27379f93c56112c5b96","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/30021e969d48e5819d5ae56936c2f34c0f7ce997","name":"https://git.kernel.org/stable/c/30021e969d48e5819d5ae56936c2f34c0f7ce997","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-43441","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-43441","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 4e24be018eb9dbcefa4b01c07e298b147dc1a4d7 49dbfcb70eca5f6f9043594e1e323c74c39e3863 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 4e24be018eb9dbcefa4b01c07e298b147dc1a4d7 cf6099ef493b94e140b0fad52482a78853115318 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 4e24be018eb9dbcefa4b01c07e298b147dc1a4d7 c78f01abe535853f13f0b26cd5b1d2f19bf52e2f git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 4e24be018eb9dbcefa4b01c07e298b147dc1a4d7 95faa1459b83fa544191e82ccc73856f03b7741f git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 4e24be018eb9dbcefa4b01c07e298b147dc1a4d7 c9c238066fb254dabf65e27379f93c56112c5b96 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 4e24be018eb9dbcefa4b01c07e298b147dc1a4d7 30021e969d48e5819d5ae56936c2f34c0f7ce997 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5.18","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.18 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.167 6.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.130 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.78 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.19 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.19.9 6.19.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.0 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"43441","cve":"CVE-2026-43441","epss":"0.000240000","percentile":"0.070400000","score_date":"2026-05-10","updated_at":"2026-05-11 00:14:41"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/net/bonding/bond_main.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"49dbfcb70eca5f6f9043594e1e323c74c39e3863","status":"affected","version":"4e24be018eb9dbcefa4b01c07e298b147dc1a4d7","versionType":"git"},{"lessThan":"cf6099ef493b94e140b0fad52482a78853115318","status":"affected","version":"4e24be018eb9dbcefa4b01c07e298b147dc1a4d7","versionType":"git"},{"lessThan":"c78f01abe535853f13f0b26cd5b1d2f19bf52e2f","status":"affected","version":"4e24be018eb9dbcefa4b01c07e298b147dc1a4d7","versionType":"git"},{"lessThan":"95faa1459b83fa544191e82ccc73856f03b7741f","status":"affected","version":"4e24be018eb9dbcefa4b01c07e298b147dc1a4d7","versionType":"git"},{"lessThan":"c9c238066fb254dabf65e27379f93c56112c5b96","status":"affected","version":"4e24be018eb9dbcefa4b01c07e298b147dc1a4d7","versionType":"git"},{"lessThan":"30021e969d48e5819d5ae56936c2f34c0f7ce997","status":"affected","version":"4e24be018eb9dbcefa4b01c07e298b147dc1a4d7","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/net/bonding/bond_main.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"5.18"},{"lessThan":"5.18","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.167","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.130","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.78","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.19","versionType":"semver"},{"lessThanOrEqual":"6.19.*","status":"unaffected","version":"6.19.9","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.0","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.167","versionStartIncluding":"5.18","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.130","versionStartIncluding":"5.18","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.78","versionStartIncluding":"5.18","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.19","versionStartIncluding":"5.18","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.19.9","versionStartIncluding":"5.18","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.0","versionStartIncluding":"5.18","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"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  <IRQ>\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  </IRQ>\n  <TASK>\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  </TASK>\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()."}],"metrics":[{"cvssV3_1":{"baseScore":7.5,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"}}],"providerMetadata":{"dateUpdated":"2026-05-11T06:34:32.163Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/49dbfcb70eca5f6f9043594e1e323c74c39e3863"},{"url":"https://git.kernel.org/stable/c/cf6099ef493b94e140b0fad52482a78853115318"},{"url":"https://git.kernel.org/stable/c/c78f01abe535853f13f0b26cd5b1d2f19bf52e2f"},{"url":"https://git.kernel.org/stable/c/95faa1459b83fa544191e82ccc73856f03b7741f"},{"url":"https://git.kernel.org/stable/c/c9c238066fb254dabf65e27379f93c56112c5b96"},{"url":"https://git.kernel.org/stable/c/30021e969d48e5819d5ae56936c2f34c0f7ce997"}],"title":"net: bonding: Fix nd_tbl NULL dereference when IPv6 is disabled","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-43441","datePublished":"2026-05-08T14:22:09.982Z","dateReserved":"2026-05-01T14:12:56.009Z","dateUpdated":"2026-05-11T06:34:32.163Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-05-08 15:16:56","lastModifiedDate":"2026-05-11 08:16:14","problem_types":[],"metrics":{"cvssMetricV31":[{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","baseScore":7.5,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"},"exploitabilityScore":3.9,"impactScore":3.6}]},"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"43441","Ordinal":"1","Title":"net: bonding: Fix nd_tbl NULL dereference when IPv6 is disabled","CVE":"CVE-2026-43441","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"43441","Ordinal":"1","NoteData":"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  <IRQ>\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  </IRQ>\n  <TASK>\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  </TASK>\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().","Type":"Description","Title":"net: bonding: Fix nd_tbl NULL dereference when IPv6 is disabled"}]}}}