{"id":"CVE-2026-68336","state":"PUBLISHED","title":"bonding: fix devconf_all NULL dereference when IPv6 is disabled","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nbonding: fix devconf_all NULL dereference when IPv6 is disabled\n\nWhen booting with the 'ipv6.disable=1' parameter, the devconf_all is\nnever initialized because inet6_init() exits before addrconf_init() is\ncalled which initializes it. bond_send_validate(), however, will still\ncall bond_ns_send_all() even ipv6 is indeed disabled. It will lead to\nNULL derefence of net->ipv6.devconf_all in ip6_pol_route().\n\n BUG: kernel NULL pointer dereference, address: 000000000000000c\n [...]\n Workqueue: bond0 bond_arp_monitor [bonding]\n RIP: 0010:ip6_pol_route+0x69/0x480\n [...]\n Call Trace:\n  <TASK>\n  ? srso_return_thunk+0x5/0x5f\n  ? __pfx_ip6_pol_route_output+0x10/0x10\n  fib6_rule_lookup+0xfe/0x260\n  ? wakeup_preempt+0x8a/0x90\n  ? srso_return_thunk+0x5/0x5f\n  ? srso_return_thunk+0x5/0x5f\n  ? sched_balance_rq+0x369/0x810\n  ip6_route_output_flags+0xd7/0x170\n  bond_ns_send_all+0xde/0x280 [bonding]\n  bond_ab_arp_probe+0x296/0x320 [bonding]\n  ? srso_return_thunk+0x5/0x5f\n  bond_activebackup_arp_mon+0xb4/0x2c0 [bonding]\n  process_one_work+0x196/0x370\n  worker_thread+0x1af/0x320\n  ? srso_return_thunk+0x5/0x5f\n  ? __pfx_worker_thread+0x10/0x10\n  kthread+0xe3/0x120\n  ? __pfx_kthread+0x10/0x10\n  ret_from_fork+0x199/0x260\n  ? __pfx_kthread+0x10/0x10\n  ret_from_fork_asm+0x1a/0x30\n  </TASK>\n\nFix this by adding ipv6_mod_enabled() condition check in the caller.","publishedAt":"2026-08-10T12:03:12.592Z","updatedAt":"2026-08-19T16:33:35.547Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"4e24be018eb9dbcefa4b01c07e298b147dc1a4d7","status":"affected","lessThan":"451c2d5422a309393aa8ae161fc1a527c2f19ab2","versionType":"git"},{"version":"4e24be018eb9dbcefa4b01c07e298b147dc1a4d7","status":"affected","lessThan":"2a4bad24ac5296b262ad821aa5e08bb265e6b154","versionType":"git"},{"version":"4e24be018eb9dbcefa4b01c07e298b147dc1a4d7","status":"affected","lessThan":"690ce66782778e8c4b1fdd79c0b0890a100e9522","versionType":"git"},{"version":"4e24be018eb9dbcefa4b01c07e298b147dc1a4d7","status":"affected","lessThan":"992dce02bdabbd9883255ea9b36494e34a7821d7","versionType":"git"},{"version":"4e24be018eb9dbcefa4b01c07e298b147dc1a4d7","status":"affected","lessThan":"738039ad21e20ca2c5bbde2f5a4f5ad5fb718038","versionType":"git"},{"version":"4e24be018eb9dbcefa4b01c07e298b147dc1a4d7","status":"affected","lessThan":"1c975de3343cdef506f2eecc833cc1f14b0401c4","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/bonding/bond_main.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.18","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.18","versionType":"semver"},{"version":"6.1.183","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.148","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.101","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.42","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.6","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/bonding/bond_main.c"]}],"references":["https://git.kernel.org/stable/c/451c2d5422a309393aa8ae161fc1a527c2f19ab2","https://git.kernel.org/stable/c/2a4bad24ac5296b262ad821aa5e08bb265e6b154","https://git.kernel.org/stable/c/690ce66782778e8c4b1fdd79c0b0890a100e9522","https://git.kernel.org/stable/c/992dce02bdabbd9883255ea9b36494e34a7821d7","https://git.kernel.org/stable/c/738039ad21e20ca2c5bbde2f5a4f5ad5fb718038","https://git.kernel.org/stable/c/1c975de3343cdef506f2eecc833cc1f14b0401c4"],"weaknesses":[],"ingestedAt":"2026-10-29T20:12:49.727Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/68xxx/CVE-2026-68336.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-68336","state":"PUBLISHED","datePublished":"2026-08-10T12:03:12.592Z","dateUpdated":"2026-08-19T16:33:35.547Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-07-30T09:28:09.383Z"},"containers":{"cna":{"title":"bonding: fix devconf_all NULL dereference when IPv6 is disabled","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nbonding: fix devconf_all NULL dereference when IPv6 is disabled\n\nWhen booting with the 'ipv6.disable=1' parameter, the devconf_all is\nnever initialized because inet6_init() exits before addrconf_init() is\ncalled which initializes it. bond_send_validate(), however, will still\ncall bond_ns_send_all() even ipv6 is indeed disabled. It will lead to\nNULL derefence of net->ipv6.devconf_all in ip6_pol_route().\n\n BUG: kernel NULL pointer dereference, address: 000000000000000c\n [...]\n Workqueue: bond0 bond_arp_monitor [bonding]\n RIP: 0010:ip6_pol_route+0x69/0x480\n [...]\n Call Trace:\n  <TASK>\n  ? srso_return_thunk+0x5/0x5f\n  ? __pfx_ip6_pol_route_output+0x10/0x10\n  fib6_rule_lookup+0xfe/0x260\n  ? wakeup_preempt+0x8a/0x90\n  ? srso_return_thunk+0x5/0x5f\n  ? srso_return_thunk+0x5/0x5f\n  ? sched_balance_rq+0x369/0x810\n  ip6_route_output_flags+0xd7/0x170\n  bond_ns_send_all+0xde/0x280 [bonding]\n  bond_ab_arp_probe+0x296/0x320 [bonding]\n  ? srso_return_thunk+0x5/0x5f\n  bond_activebackup_arp_mon+0xb4/0x2c0 [bonding]\n  process_one_work+0x196/0x370\n  worker_thread+0x1af/0x320\n  ? srso_return_thunk+0x5/0x5f\n  ? __pfx_worker_thread+0x10/0x10\n  kthread+0xe3/0x120\n  ? __pfx_kthread+0x10/0x10\n  ret_from_fork+0x199/0x260\n  ? __pfx_kthread+0x10/0x10\n  ret_from_fork_asm+0x1a/0x30\n  </TASK>\n\nFix this by adding ipv6_mod_enabled() condition check in the caller."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"4e24be018eb9dbcefa4b01c07e298b147dc1a4d7","status":"affected","lessThan":"451c2d5422a309393aa8ae161fc1a527c2f19ab2","versionType":"git"},{"version":"4e24be018eb9dbcefa4b01c07e298b147dc1a4d7","status":"affected","lessThan":"2a4bad24ac5296b262ad821aa5e08bb265e6b154","versionType":"git"},{"version":"4e24be018eb9dbcefa4b01c07e298b147dc1a4d7","status":"affected","lessThan":"690ce66782778e8c4b1fdd79c0b0890a100e9522","versionType":"git"},{"version":"4e24be018eb9dbcefa4b01c07e298b147dc1a4d7","status":"affected","lessThan":"992dce02bdabbd9883255ea9b36494e34a7821d7","versionType":"git"},{"version":"4e24be018eb9dbcefa4b01c07e298b147dc1a4d7","status":"affected","lessThan":"738039ad21e20ca2c5bbde2f5a4f5ad5fb718038","versionType":"git"},{"version":"4e24be018eb9dbcefa4b01c07e298b147dc1a4d7","status":"affected","lessThan":"1c975de3343cdef506f2eecc833cc1f14b0401c4","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/bonding/bond_main.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.18","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.18","versionType":"semver"},{"version":"6.1.183","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.148","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.101","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.42","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.6","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/bonding/bond_main.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/451c2d5422a309393aa8ae161fc1a527c2f19ab2"},{"url":"https://git.kernel.org/stable/c/2a4bad24ac5296b262ad821aa5e08bb265e6b154"},{"url":"https://git.kernel.org/stable/c/690ce66782778e8c4b1fdd79c0b0890a100e9522"},{"url":"https://git.kernel.org/stable/c/992dce02bdabbd9883255ea9b36494e34a7821d7"},{"url":"https://git.kernel.org/stable/c/738039ad21e20ca2c5bbde2f5a4f5ad5fb718038"},{"url":"https://git.kernel.org/stable/c/1c975de3343cdef506f2eecc833cc1f14b0401c4"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-08-19T16:33:35.547Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.18","versionEndExcluding":"6.1.183"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.18","versionEndExcluding":"6.6.148"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.18","versionEndExcluding":"6.12.101"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.18","versionEndExcluding":"6.18.42"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.18","versionEndExcluding":"7.1.6"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.18","versionEndExcluding":"7.2"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}