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CVE-2026-43210

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: tracing: ring-buffer: Fix to check event length before using Check the event length before adding it for accessing next index i…

Published May 6, 2026EPSS 0.16%

Overview

CVE-2026-43210 is a medium-severity vulnerability. It was published on May 6, 2026 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. 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:

tracing: ring-buffer: Fix to check event length before using

Check the event length before adding it for accessing next index in

rb_read_data_buffer(). Since this function is used for validating

possibly broken ring buffers, the length of the event could be broken.

In that case, the new event (e + len) can point a wrong address.

To avoid invalid memory access at boot, check whether the length of

each event is in the possible range before using it.

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/5026010110a5ad2268d8c23e1e286ab7c736f7acRefgit.kernel.org/stable/c/912b0ee248c529a4f45d1e7f568dc1adddbf2a4aRefgit.kernel.org/stable/c/9eb80e54494ef1efef8a64bec4ffa672c9cf411eRefgit.kernel.org/stable/c/b4700c089a10f89de3a5149d57f8a58306458982

How CyberStrike helps

Frequently asked questions

What is CVE-2026-43210?

CVE-2026-43210 is a medium-severity vulnerability. It was published on May 6, 2026 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2026-43210?

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-43210?

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-2026-43210?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-43210 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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