CVE-2026-68336 (GCVE-0-2026-68336)
Vulnerability from cvelistv5
Published
2026-08-10 12:03
Modified
2026-08-19 16:33
Severity ?
VLAI Severity ?
EPSS score ?
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.
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Linux | Linux |
Version: 4e24be018eb9dbcefa4b01c07e298b147dc1a4d7 Version: 4e24be018eb9dbcefa4b01c07e298b147dc1a4d7 Version: 4e24be018eb9dbcefa4b01c07e298b147dc1a4d7 Version: 4e24be018eb9dbcefa4b01c07e298b147dc1a4d7 Version: 4e24be018eb9dbcefa4b01c07e298b147dc1a4d7 Version: 4e24be018eb9dbcefa4b01c07e298b147dc1a4d7 |
||
{
"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": "451c2d5422a309393aa8ae161fc1a527c2f19ab2",
"status": "affected",
"version": "4e24be018eb9dbcefa4b01c07e298b147dc1a4d7",
"versionType": "git"
},
{
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"versionType": "git"
},
{
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"status": "affected",
"version": "4e24be018eb9dbcefa4b01c07e298b147dc1a4d7",
"versionType": "git"
},
{
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"versionType": "git"
},
{
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{
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}
]
},
{
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"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": "6.1.183",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"version": "6.6.148",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"version": "6.12.101",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.18.*",
"status": "unaffected",
"version": "6.18.42",
"versionType": "semver"
},
{
"lessThanOrEqual": "7.1.*",
"status": "unaffected",
"version": "7.1.6",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.1.183",
"versionStartIncluding": "5.18",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.6.148",
"versionStartIncluding": "5.18",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.12.101",
"versionStartIncluding": "5.18",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.18.42",
"versionStartIncluding": "5.18",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "7.1.6",
"versionStartIncluding": "5.18",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "7.2",
"versionStartIncluding": "5.18",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"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"
},
"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"
}
],
"title": "bonding: fix devconf_all NULL dereference when IPv6 is disabled",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2026-68336",
"datePublished": "2026-08-10T12:03:12.592Z",
"dateReserved": "2026-07-30T09:28:09.383Z",
"dateUpdated": "2026-08-19T16:33:35.547Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
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