Deadlock Affecting kernel-64k-devel-matched package, versions *


Severity

Recommended
low

Based on CentOS security rating.

Threat Intelligence

EPSS
0.02% (5th percentile)

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  • Snyk IDSNYK-CENTOS10-KERNEL64KDEVELMATCHED-16544213
  • published9 May 2026
  • disclosed8 May 2026

Introduced: 8 May 2026

NewCVE-2026-43309  (opens in a new tab)
CWE-833  (opens in a new tab)

How to fix?

There is no fixed version for Centos:10 kernel-64k-devel-matched.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-64k-devel-matched package and not the kernel-64k-devel-matched package as distributed by Centos. See How to fix? for Centos:10 relevant fixed versions and status.

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

md raid: fix hang when stopping arrays with metadata through dm-raid

When using device-mapper's dm-raid target, stopping a RAID array can cause the system to hang under specific conditions.

This occurs when:

  • A dm-raid managed device tree is suspended from top to bottom (the top-level RAID device is suspended first, followed by its underlying metadata and data devices)

  • The top-level RAID device is then removed

Removing the top-level device triggers a hang in the following sequence: the dm-raid destructor calls md_stop(), which tries to flush the write-intent bitmap by writing to the metadata sub-devices. However, these devices are already suspended, making them unable to complete the write-intent operations and causing an indefinite block.

Fix:

  • Prevent bitmap flushing when md_stop() is called from dm-raid destructor context and avoid a quiescing/unquescing cycle which could also cause I/O

  • Still allow write-intent bitmap flushing when called from dm-raid suspend context

This ensures that RAID array teardown can complete successfully even when the underlying devices are in a suspended state.

This second patch uses md_is_rdwr() to distinguish between suspend and destructor paths as elaborated on above.

CVSS Base Scores

version 3.1