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CVE-2026-23416

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: mm/mseal: update VMA end correctly on merge Previously we stored the end of the current VMA in curr_end, and then upon iteratin…

Published Apr 2, 2026EPSS 0.22%

Overview

CVE-2026-23416 is a medium-severity vulnerability. It was published on April 2, 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:

mm/mseal: update VMA end correctly on merge

Previously we stored the end of the current VMA in curr_end, and then upon

iterating to the next VMA updated curr_start to curr_end to advance to the

next VMA.

However, this doesn't take into account the fact that a VMA might be

updated due to a merge by vma_modify_flags(), which can result in curr_end

being stale and thus, upon setting curr_start to curr_end, ending up with

an incorrect curr_start on the next iteration.

Resolve the issue by setting curr_end to vma->vm_end unconditionally to

ensure this value remains updated should this occur.

While we're here, eliminate this entire class of bug by simply setting

const curr_[start/end] to be clamped to the input range and VMAs, which

also happens to simplify the logic.

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/2697dd8ae721db4f6a53d4f4cbd438212a80f8dcRefgit.kernel.org/stable/c/40b3f4700e5535fbe74738cebb9379a40ec66bedRefgit.kernel.org/stable/c/83737e34b83a23b2a9bcf586b058b2c2a54c7c6b

How CyberStrike helps

Frequently asked questions

What is CVE-2026-23416?

CVE-2026-23416 is a medium-severity vulnerability. It was published on April 2, 2026 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2026-23416?

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-2026-23416?

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-2026-23416?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-23416 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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