CVE-2026-68336 (GCVE-0-2026-68336)

Vulnerability from cvelistv5 – Published: 2026-08-10 12:03 – Updated: 2026-08-19 16:33
VLAI
Title
bonding: fix devconf_all NULL dereference when IPv6 is disabled
Summary
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.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 4e24be018eb9dbcefa4b01c07e298b147dc1a4d7 , < 451c2d5422a309393aa8ae161fc1a527c2f19ab2 (git)
Affected: 4e24be018eb9dbcefa4b01c07e298b147dc1a4d7 , < 2a4bad24ac5296b262ad821aa5e08bb265e6b154 (git)
Affected: 4e24be018eb9dbcefa4b01c07e298b147dc1a4d7 , < 690ce66782778e8c4b1fdd79c0b0890a100e9522 (git)
Affected: 4e24be018eb9dbcefa4b01c07e298b147dc1a4d7 , < 992dce02bdabbd9883255ea9b36494e34a7821d7 (git)
Affected: 4e24be018eb9dbcefa4b01c07e298b147dc1a4d7 , < 738039ad21e20ca2c5bbde2f5a4f5ad5fb718038 (git)
Affected: 4e24be018eb9dbcefa4b01c07e298b147dc1a4d7 , < 1c975de3343cdef506f2eecc833cc1f14b0401c4 (git)
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Linux Linux Affected: 5.18
Unaffected: 0 , < 5.18 (semver)
Unaffected: 6.1.183 , ≤ 6.1.* (semver)
Unaffected: 6.6.148 , ≤ 6.6.* (semver)
Unaffected: 6.12.101 , ≤ 6.12.* (semver)
Unaffected: 6.18.42 , ≤ 6.18.* (semver)
Unaffected: 7.1.6 , ≤ 7.1.* (semver)
Unaffected: 7.2 , ≤ * (original_commit_for_fix)
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{
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              "operator": "OR"
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      "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 \u0027ipv6.disable=1\u0027 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-\u003eipv6.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  \u003cTASK\u003e\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  \u003c/TASK\u003e\n\nFix this by adding ipv6_mod_enabled() condition check in the caller."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-19T16:33:35.547Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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        },
        {
          "url": "https://git.kernel.org/stable/c/1c975de3343cdef506f2eecc833cc1f14b0401c4"
        }
      ],
      "title": "bonding: fix devconf_all NULL dereference when IPv6 is disabled",
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-68336",
    "datePublished": "2026-08-10T12:03:12.592Z",
    "dateReserved": "2026-07-30T09:28:09.383Z",
    "dateUpdated": "2026-08-19T16:33:35.547Z",
    "state": "PUBLISHED"
  },
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  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-68336",
      "date": "2026-08-20",
      "epss": "0.0018",
      "percentile": "0.07898"
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    "nvd": "{\"cve\":{\"id\":\"CVE-2026-68336\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-08-10T13:20:23.990\",\"lastModified\":\"2026-08-19T17:20:43.663\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"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 \u0027ipv6.disable=1\u0027 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-\u003eipv6.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  \u003cTASK\u003e\\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  \u003c/TASK\u003e\\n\\nFix this by adding ipv6_mod_enabled() condition check in the caller.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"drivers/net/bonding/bond_main.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"4e24be018eb9dbcefa4b01c07e298b147dc1a4d7\",\"lessThan\":\"451c2d5422a309393aa8ae161fc1a527c2f19ab2\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"4e24be018eb9dbcefa4b01c07e298b147dc1a4d7\",\"lessThan\":\"2a4bad24ac5296b262ad821aa5e08bb265e6b154\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"4e24be018eb9dbcefa4b01c07e298b147dc1a4d7\",\"lessThan\":\"690ce66782778e8c4b1fdd79c0b0890a100e9522\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"4e24be018eb9dbcefa4b01c07e298b147dc1a4d7\",\"lessThan\":\"992dce02bdabbd9883255ea9b36494e34a7821d7\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"4e24be018eb9dbcefa4b01c07e298b147dc1a4d7\",\"lessThan\":\"738039ad21e20ca2c5bbde2f5a4f5ad5fb718038\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"4e24be018eb9dbcefa4b01c07e298b147dc1a4d7\",\"lessThan\":\"1c975de3343cdef506f2eecc833cc1f14b0401c4\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"drivers/net/bonding/bond_main.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"5.18\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"5.18\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.183\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.148\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.101\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.42\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.1.6\",\"lessThanOrEqual\":\"7.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.2\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/1c975de3343cdef506f2eecc833cc1f14b0401c4\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/2a4bad24ac5296b262ad821aa5e08bb265e6b154\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/451c2d5422a309393aa8ae161fc1a527c2f19ab2\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/690ce66782778e8c4b1fdd79c0b0890a100e9522\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/738039ad21e20ca2c5bbde2f5a4f5ad5fb718038\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/992dce02bdabbd9883255ea9b36494e34a7821d7\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}",
    "redhat_vex": {
      "aggregate_severity": "Low",
      "current_release_date": "2026-08-11T15:33:48+00:00",
      "cve": "CVE-2026-68336",
      "id": "CVE-2026-68336",
      "initial_release_date": "2026-08-10T00:00:00+00:00",
      "product_status:known_affected": "198",
      "product_status:known_not_affected": "76",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: bonding: fix devconf_all NULL dereference when IPv6 is disabled",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-68336.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-08-11T23:47:24Z",
      "cve": "CVE-2026-68336",
      "id": "CVE-2026-68336",
      "initial_release_date": "2026-08-11T23:47:24Z",
      "product_status:known_affected": "129",
      "product_status:known_not_affected": "167",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-68336",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-68336.json",
      "version": "2"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.