CVE-2026-68336

Service interruption via unchecked IPv6 bonding path

Published Aug 10, 2026 · Updated Aug 10, 2026

NULL-pointer dereference in the Linux bonding driver allows local users with administrative privileges to interrupt kernel service. With IPv6 disabled at boot, inet6_init exits before devconf_all is initialized, but bond_send_validate still reaches bond_ns_send_all and ip6_pol_route dereferences net->ipv6.devconf_all. Reachability requires the ipv6.disable=1 boot parameter and a bond using ARP monitoring; the observed consequence is a kernel fault in the bonding workqueue.

CVSS severity4.4
Medium
EPSS probability0.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

NULL-pointer dereference in the Linux bonding driver allows local users with administrative privileges to interrupt kernel service. With IPv6 disabled at boot, inet6_init exits before devconf_all is initialized, but bond_send_validate still reaches bond_ns_send_all and ip6_pol_route dereferences net->ipv6.devconf_all. Reachability requires the ipv6.disable=1 boot parameter and a bond using ARP monitoring; the observed consequence is a kernel fault in the bonding workqueue.

The record

CVE
CVE-2026-68336
Published
Aug 10, 2026
Updated
Aug 10, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Aug 10, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 10, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=4e24be018eb9dbcefa4b01c07e298b147dc1a4d7 <1c975de3343cdef506f2eecc833cc1f14b0401c4
  2. Affected versionversion=4e24be018eb9dbcefa4b01c07e298b147dc1a4d7 <2a4bad24ac5296b262ad821aa5e08bb265e6b154
  3. Affected versionversion=4e24be018eb9dbcefa4b01c07e298b147dc1a4d7 <690ce66782778e8c4b1fdd79c0b0890a100e9522
  4. Affected versionversion=4e24be018eb9dbcefa4b01c07e298b147dc1a4d7 <738039ad21e20ca2c5bbde2f5a4f5ad5fb718038
  5. Affected versionversion=4e24be018eb9dbcefa4b01c07e298b147dc1a4d7 <992dce02bdabbd9883255ea9b36494e34a7821d7
  6. Affected versionversion=5.18

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

The Linux Kernel Organization · Linuxversion=4e24be018eb9dbcefa4b01c07e298b147dc1a4d7 <1c975de3343cdef506f2eecc833cc1f14b0401c4; version=4e24be018eb9dbcefa4b01c07e298b147dc1a4d7 <2a4bad24ac5296b262ad821aa5e08bb265e6b154; version=4e24be018eb9dbcefa4b01c07e298b147dc1a4d7 <690ce66782778e8c4b1fdd79c0b0890a100e9522; version=4e24be018eb9dbcefa4b01c07e298b147dc1a4d7 <738039ad21e20ca2c5bbde2f5a4f5ad5fb718038; version=4e24be018eb9dbcefa4b01c07e298b147dc1a4d7 <992dce02bdabbd9883255ea9b36494e34a7821d7; version=5.18

Published CVSS scores

4.4Amazon LinuxCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499.004Endpoint Denial of Service: Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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