Vulnerability Database

356,670

Total vulnerabilities in the database

CVE-2026-43309 — linux / linux_kernel

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.

  • Published: May 8, 2026
  • Updated: May 16, 2026
  • CVE: CVE-2026-43309
  • Severity: Medium
  • Exploit:
  • CISA KEV:

CVSS v3:

  • Severity: Medium
  • Score: 5.5
  • AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

No CWE or OWASP classifications available.

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