CVE-2026-68336
bonding: fix devconf_all NULL dereference when IPv6 is disabled
At a glance
- Source
- NVD
- EPSS
- EPSS 0.18 % · percentile 8 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- Linux
- NVD status
- Received
Description
In the Linux kernel, the following vulnerability has been resolved: bonding: fix devconf_all NULL dereference when IPv6 is disabled When booting with the 'ipv6.disable=1' parameter, the devconf_all is never initialized because inet6_init() exits before addrconf_init() is called which initializes it. bond_send_validate(), however, will still call bond_ns_send_all() even ipv6 is indeed disabled. It will lead to NULL derefence of net->ipv6.devconf_all in ip6_pol_route(). BUG: kernel NULL pointer dereference, address: 000000000000000c [...] Workqueue: bond0 bond_arp_monitor [bonding] RIP: 0010:ip6_pol_route+0x69/0x480 [...] Call Trace: <TASK> ? srso_return_thunk+0x5/0x5f ? __pfx_ip6_pol_route_output+0x10/0x10 fib6_rule_lookup+0xfe/0x260 ? wakeup_preempt+0x8a/0x90 ? srso_return_thunk+0x5/0x5f ? srso_return_thunk+0x5/0x5f ? sched_balance_rq+0x369/0x810 ip6_route_output_flags+0xd7/0x170 bond_ns_send_all+0xde/0x280 [bonding] bond_ab_arp_probe+0x296/0x320 [bonding] ? srso_return_thunk+0x5/0x5f bond_activebackup_arp_mon+0xb4/0x2c0 [bonding] process_one_work+0x196/0x370 worker_thread+0x1af/0x320 ? srso_return_thunk+0x5/0x5f ? __pfx_worker_thread+0x10/0x10 kthread+0xe3/0x120 ? __pfx_kthread+0x10/0x10 ret_from_fork+0x199/0x260 ? __pfx_kthread+0x10/0x10 ret_from_fork_asm+0x1a/0x30 </TASK> Fix this by adding ipv6_mod_enabled() condition check in the caller.
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
European references
- ENISA EUVD · EUVD-2026-55437
- GCVE · GCVE-0-2026-68336
CERT-FR advisories
- CERTFR-2026-AVI-1385 — Multiples vulnérabilités dans les produits VMware · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1333 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1286 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1255 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1202 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1164 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1163 — Multiples vulnérabilités dans le noyau Linux de Debian LTS · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1069 — Multiples vulnérabilités dans le noyau Linux de Debian LTS · cert.ssi.gouv.fr
Affected products
| Product | Versions |
|---|---|
| Linux · Linux | affected 4e24be018eb9dbcefa4b01c07e298b147dc1a4d7 < 451c2d5422a309393aa8ae161fc1a527c2f19ab2 ; affected 4e24be018eb9dbcefa4b01c07e298b147dc1a4d7 < 2a4bad24ac5296b262ad821aa5e08bb265e6b154 ; affected 4e24be018eb9dbcefa4b01c07e298b147dc1a4d7 < 690ce66782778e8c4b1fdd79c0b0890a100e9522 ; affected 4e24be018eb9dbcefa4b01c07e298b147dc1a4d7 < 992dce02bdabbd9883255ea9b36494e34a7821d7 ; affected 4e24be018eb9dbcefa4b01c07e298b147dc1a4d7 < 738039ad21e20ca2c5bbde2f5a4f5ad5fb718038 ; affected 4e24be018eb9dbcefa4b01c07e298b147dc1a4d7 < 1c975de3343cdef506f2eecc833cc1f14b0401c4 |
| Linux · Linux | affected 5.18 ; unaffected 0 < 5.18 ; unaffected 6.1.183 ≤ 6.1.* ; unaffected 6.6.148 ≤ 6.6.* ; unaffected 6.12.101 ≤ 6.12.* ; unaffected 6.18.42 ≤ 6.18.* |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| CERT-FR (ANSSI) | Licence Ouverte / Etalab 2.0 |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |