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CVE-2026-46017

4.7 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: mm: fix deferred split queue races during migration migrate_folio_move() records the deferred split queue state from src and re…

Published May 27, 2026CWE-362EPSS 0.10%

Overview

CVE-2026-46017 is a medium-severity vulnerability. It was published on May 27, 2026 and has a CVSS 3.1 base score of 4.7 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 4.7, 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: fix deferred split queue races during migration

migrate_folio_move() records the deferred split queue state from src and

replays it on dst. Replaying it after remove_migration_ptes(src, dst, 0)

makes dst visible before it is requeued, so a concurrent rmap-removal path

can mark dst partially mapped and trip the WARN in deferred_split_folio().

Move the requeue before remove_migration_ptes() so dst is back on the

deferred split queue before it becomes visible again.

Because migration still holds dst locked at that point, teach

deferred_split_scan() to requeue a folio when folio_trylock() fails.

Otherwise a fully mapped underused folio can be dequeued by the shrinker

and silently lost from split_queue.

[[email protected]: move the comment]

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/3bac01168982ec3e3bf87efdc1807c7933590a85Refgit.kernel.org/stable/c/cbf75cf212ee6e499abc1757fb4b5ae6d70ed0aa

How CyberStrike helps

Frequently asked questions

What is CVE-2026-46017?

CVE-2026-46017 is a medium-severity vulnerability. It was published on May 27, 2026 and has a CVSS 3.1 base score of 4.7 (MEDIUM).

How severe is CVE-2026-46017?

This vulnerability has a CVSS 3.1 base score of 4.7, 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-2026-46017?

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-2026-46017?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-46017 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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