{"id":"CVE-2026-68336","title":"bonding: fix devconf_all NULL dereference when IPv6 is disabled","summary":"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_in…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 4e24be018eb9dbcefa4b01c07e298b147dc1a4d7 < 451c2d5422a309393aa8ae161fc1a527c2f19ab2","Linux >= 4e24be018eb9dbcefa4b01c07e298b147dc1a4d7 < 2a4bad24ac5296b262ad821aa5e08bb265e6b154","Linux >= 4e24be018eb9dbcefa4b01c07e298b147dc1a4d7 < 690ce66782778e8c4b1fdd79c0b0890a100e9522","Linux >= 4e24be018eb9dbcefa4b01c07e298b147dc1a4d7 < 992dce02bdabbd9883255ea9b36494e34a7821d7","Linux >= 4e24be018eb9dbcefa4b01c07e298b147dc1a4d7 < 738039ad21e20ca2c5bbde2f5a4f5ad5fb718038","Linux >= 4e24be018eb9dbcefa4b01c07e298b147dc1a4d7 < 1c975de3343cdef506f2eecc833cc1f14b0401c4","Linux 5.18"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-11-06T16:47:29.663724Z"},"published":"2026-08-10","updated":"2026-11-06","sourceUpdated":"2026-11-06T16:55:13.466Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-68336","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"}],"tags":["cve.org"],"epss":0.0018,"epssPercentile":0.07645,"ingestedAt":"2026-11-06T18:00:12.611Z","slug":"CVE-2026-68336","body":"## Overview\n\nIn 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.\n\n## Affected\n\n- `Linux >= 4e24be018eb9dbcefa4b01c07e298b147dc1a4d7 < 451c2d5422a309393aa8ae161fc1a527c2f19ab2`\n- `Linux >= 4e24be018eb9dbcefa4b01c07e298b147dc1a4d7 < 2a4bad24ac5296b262ad821aa5e08bb265e6b154`\n- `Linux >= 4e24be018eb9dbcefa4b01c07e298b147dc1a4d7 < 690ce66782778e8c4b1fdd79c0b0890a100e9522`\n- `Linux >= 4e24be018eb9dbcefa4b01c07e298b147dc1a4d7 < 992dce02bdabbd9883255ea9b36494e34a7821d7`\n- `Linux >= 4e24be018eb9dbcefa4b01c07e298b147dc1a4d7 < 738039ad21e20ca2c5bbde2f5a4f5ad5fb718038`\n- `Linux >= 4e24be018eb9dbcefa4b01c07e298b147dc1a4d7 < 1c975de3343cdef506f2eecc833cc1f14b0401c4`\n- `Linux 5.18`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}