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CVE-2026-43309 (GCVE-0-2026-43309)

Vulnerability from cvelistv5 – Published: 2026-05-08 13:11 – Updated: 2026-05-23 16:06
VLAI
Title
md raid: fix hang when stopping arrays with metadata through dm-raid
Summary
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.
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 0dd84b319352bb8ba64752d4e45396d8b13e6018 , < 24783dd06de870d646c25207bae186f78195f912 (git)
Affected: 0dd84b319352bb8ba64752d4e45396d8b13e6018 , < 338378dfffbdbb8d37a18f0a0c0358812671f91e (git)
Affected: 0dd84b319352bb8ba64752d4e45396d8b13e6018 , < cefcb9297fbdb6d94b61787b4f8d84f55b741470 (git)
Affected: 1678ca35b80a94d474fdc31e2497ce5d7ed52512 (git)
Affected: 690b5c90fd2d81fd1d2b6110fa36783232f6dce2 (git)
Affected: 8e7fb19f1a744fd34e982633ced756fee0498ef7 (git)
Affected: a5a58fab556bfe618b4c9719eb85712d78c6cb10 (git)
Affected: 661c01b2181d9413c799127f13143583b69f20fd (git)
Affected: f42a9819ba84bed2e609a4dff56af37063dcabdc (git)
Affected: 4.14.292 , < 4.15 (semver)
Affected: 4.19.257 , < 4.20 (semver)
Affected: 5.4.212 , < 5.5 (semver)
Affected: 5.10.140 , < 5.11 (semver)
Affected: 5.15.64 , < 5.16 (semver)
Affected: 5.19.6 , < 5.20 (semver)
guessed Create a notification for this product.
Linux Linux Affected: 6.0
Unaffected: 0 , < 6.0 (semver)
Unaffected: 6.18.16 , ≤ 6.18.* (semver)
Unaffected: 6.19.6 , ≤ 6.19.* (semver)
Unaffected: 7.0 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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    "redhat_vex": {
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      "cve": "CVE-2026-43309",
      "id": "CVE-2026-43309",
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      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: md raid: fix hang when stopping arrays with metadata through dm-raid",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-43309.json",
      "version": "3"
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      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-43309",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-43309.json",
      "version": "11"
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}



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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.