Race Condition Affecting linux-gcp-6.18 package, versions <6.18.38-r2


Severity

Recommended
0.0
medium
0
10

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Threat Intelligence

EPSS
0.11% (2nd percentile)

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  • Snyk IDSNYK-CHAINGUARDLATEST-LINUXGCP618-17996079
  • published16 Jul 2026
  • disclosed27 May 2026

Introduced: 27 May 2026

CVE-2026-46017  (opens in a new tab)
CWE-362  (opens in a new tab)

How to fix?

Upgrade Chainguard linux-gcp-6.18 to version 6.18.38-r2 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream linux-gcp-6.18 package and not the linux-gcp-6.18 package as distributed by Chainguard. See How to fix? for Chainguard relevant fixed versions and status.

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.

[ziy@nvidia.com: move the comment]

CVSS Base Scores

version 3.1