CVE-2026-43309

Security update for the Linux Kernel

mediumEPSS 0.1%

Description

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.

Metrics

Severity
medium
no public PoC known
5.5
Source: nvd-v3
2.1 %
Low — this CVE sits in the lower 10% of all CVEs scored today.
0.1 %
Low — model estimates < 1% exploitation likelihood.
Published
2026-08-12 11:31 UTC

Affected operating systems

  • linux

    amazon / amazon_linux

  • linux

    suse / basesystem_module15

  • linux

    debian / debian_linux11.0

  • linux

    debian / debian_linux12.0

  • linux

    debian / debian_linux13.0

  • linux

    suse / development_tools_module15

  • linux

    redhat / enterprise_linux10.0

  • linux

    redhat / enterprise_linux7.0

  • linux

    redhat / enterprise_linux8.0

  • linux

    redhat / enterprise_linux9.0

  • linux

    redhat / enterprise_linux_aus8.4

  • linux

    redhat / enterprise_linux_aus8.6

  • linux

    redhat / enterprise_linux_eus10.0

  • linux

    redhat / enterprise_linux_eus8.4

  • linux

    redhat / enterprise_linux_eus9.4

  • linux

    redhat / enterprise_linux_eus9.6

  • linux

    redhat / enterprise_linux_tus8.6

  • linux

    redhat / enterprise_linux_tus8.8

  • linux

    redhat / enterprise_linux_update_services_for_sap_solutions8.6

  • linux

    redhat / enterprise_linux_update_services_for_sap_solutions8.8

  • linux

    redhat / enterprise_linux_update_services_for_sap_solutions9.0

  • linux

    redhat / enterprise_linux_update_services_for_sap_solutions9.2

  • linux

    opensuse / leap15.3

  • linux

    opensuse / leap15.4

Affected products

Products and version ranges extracted from the vendor/CERT advisory. A range like „<4.14.6“ implies the update recommendation „upgrade to 4.14.6 or later“.

  • arista

    cloudvision_agni2024.4.0 – 2025.2.2

  • arista

    cloudvision_portal2024.2.0 – 2026.1.0

  • arista

    velocloud_edge4.5.0 – 6.4.1

  • arista

    velocloud_gateway

  • arista

    velocloud_orchestrator

  • redhat

    openshift_container_platform4.12 – 4.12.89

  • redhat

    openshift_container_platform4.13 – 4.13.66

  • redhat

    openshift_container_platform4.14 – 4.14.65

  • redhat

    openshift_container_platform4.15 – 4.15.64

  • redhat

    openshift_container_platform4.16 – 4.16.61

  • redhat

    openshift_container_platform4.17 – 4.17.53

  • redhat

    openshift_container_platform4.18 – 4.18.40

  • redhat

    openshift_container_platform4.19 – 4.19.30

  • redhat

    openshift_container_platform4.20 – 4.20.21

  • redhat

    openshift_container_platform4.21 – 4.21.14

  • redhat

    openshift_container_platform

  • siemens

    simatic_ax_runtime

  • suse

    caas_platform

  • suse

    enterprise_storage

  • suse

    manager_proxy

  • suse

    manager_retail_branch_server

  • suse

    manager_server

  • suse

    openstack_cloud

  • suse

    openstack_cloud_crowbar

References & sources

Linked CVEs

Show 164 more CVEs
IDCVE-2026-43309