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CVE-2026-53230

8.7 · HIGH

In the Linux kernel, the following vulnerability has been resolved: net/mlx5: Fix slab-out-of-bounds in mlx5_query_nic_vport_mac_list mlx5_query_nic_vport_mac_list() sizes its firmware command bu…

Published Jun 25, 2026CWE-125EPSS 0.13%

Overview

CVE-2026-53230 is a high-severity vulnerability. It was published on June 25, 2026 and has a CVSS 3.1 base score of 8.7 (HIGH).

This vulnerability has a CVSS 3.1 base score of 8.7, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

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

net/mlx5: Fix slab-out-of-bounds in mlx5_query_nic_vport_mac_list

mlx5_query_nic_vport_mac_list() sizes its firmware command buffer using

the PF's log_max_current_uc/mc_list capabilities. When querying a VF

vport with a larger configured max (via devlink), the firmware response

can overflow this buffer:

BUG: KASAN: slab-out-of-bounds in mlx5_query_nic_vport_mac_list+0x453/0x4c0 [mlx5_core]

Read of size 4 at addr ff1100013ffc8a12 by task kworker/u96:2/385

CPU: 12 UID: 0 PID: 385 Comm: kworker/u96:2 Not tainted 7.0.0-rc6+ #1 PREEMPT

Hardware name: QEMU Standard PC (Q35 + ICH9, 2009)

Workqueue: mlx5_esw_wq esw_vport_change_handler [mlx5_core]

Call Trace:

<TASK>

dump_stack_lvl+0x69/0xa0

print_report+0x176/0x4e4

kasan_report+0xc8/0x100

mlx5_query_nic_vport_mac_list+0x453/0x4c0 [mlx5_core]

esw_update_vport_addr_list+0x2e3/0xda0 [mlx5_core]

esw_vport_change_handle_locked+0xa1f/0x1060 [mlx5_core]

esw_

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/0f807764bb122fd63aa45f4229cb1ef2679fbd40Refgit.kernel.org/stable/c/2398e497389ed4be43f7cfbab499b49cec7dae1aRefgit.kernel.org/stable/c/41781f2789309462520a93822e946521ed78f97fRefgit.kernel.org/stable/c/537d87784e81c3d7037525b99416455cee088cdcRefgit.kernel.org/stable/c/894e036a24a26a6dd7b17d8d3fb5c53ab48a6074

How CyberStrike helps

Frequently asked questions

What is CVE-2026-53230?

CVE-2026-53230 is a high-severity vulnerability. It was published on June 25, 2026 and has a CVSS 3.1 base score of 8.7 (HIGH).

How severe is CVE-2026-53230?

This vulnerability has a CVSS 3.1 base score of 8.7, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-53230?

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-2026-53230?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-53230 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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