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CVE-2026-43441

7.5 · HIGH

In the Linux kernel, the following vulnerability has been resolved: net: bonding: Fix nd_tbl NULL dereference when IPv6 is disabled When booting with the 'ipv6.disable=1' parameter, the nd_tbl is…

Published May 8, 2026CWE-476EPSS 0.68%

Overview

CVE-2026-43441 is a high-severity vulnerability. It was published on May 8, 2026 and has a CVSS 3.1 base score of 7.5 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

In the Linux kernel, the following vulnerability has been resolved:

net: bonding: Fix nd_tbl NULL dereference when IPv6 is disabled

When booting with the 'ipv6.disable=1' parameter, the nd_tbl is never

initialized because inet6_init() exits before ndisc_init() is called

which initializes it. If bonding ARP/NS validation is enabled, an IPv6

NS/NA packet received on a slave can reach bond_validate_na(), which

calls bond_has_this_ip6(). That path calls ipv6_chk_addr() and can

crash in __ipv6_chk_addr_and_flags().

BUG: kernel NULL pointer dereference, address: 00000000000005d8

Oops: Oops: 0000 [#1] SMP NOPTI

RIP: 0010:__ipv6_chk_addr_and_flags+0x69/0x170

Call Trace:

<IRQ>

ipv6_chk_addr+0x1f/0x30

bond_validate_na+0x12e/0x1d0 [bonding]

? __pfx_bond_handle_frame+0x10/0x10 [bonding]

bond_rcv_validate+0x1a0/0x450 [bonding]

bond_handle_frame+0x5e/0x290 [bonding]

? srso_alias_return_thunk+0x5/0xfbef5

__netif_receive_skb_core.constprop.0+0x3e8/0xe50

? srso_alias_return_thu

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refgit.kernel.org/stable/c/30021e969d48e5819d5ae56936c2f34c0f7ce997Refgit.kernel.org/stable/c/49dbfcb70eca5f6f9043594e1e323c74c39e3863Refgit.kernel.org/stable/c/95faa1459b83fa544191e82ccc73856f03b7741fRefgit.kernel.org/stable/c/c78f01abe535853f13f0b26cd5b1d2f19bf52e2fRefgit.kernel.org/stable/c/c9c238066fb254dabf65e27379f93c56112c5b96Refgit.kernel.org/stable/c/cf6099ef493b94e140b0fad52482a78853115318

How CyberStrike helps

Frequently asked questions

What is CVE-2026-43441?

CVE-2026-43441 is a high-severity vulnerability. It was published on May 8, 2026 and has a CVSS 3.1 base score of 7.5 (HIGH).

How severe is CVE-2026-43441?

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-43441?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-43441?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-43441 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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