CVE-2026-43309
Vulnérabilité non évaluée dans Linux (Linux)
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.
Gravité et risque d'exploitation
CVE-2026-43309 obtient un score CVSS de 0.0/10, soit une gravité non évaluée. Selon le modèle EPSS, la probabilité qu'elle soit exploitée dans les 30 prochains jours est de 0.16 %, ce qui la place devant 4.7 % des CVE référencées.
Que faire ?
- Vérifiez si Linux (versions <5.11, <338378dfffbdbb8d37a18f0a0c0358812671f91e, <cefcb9297fbdb6d94b61787b4f8d84f55b741470, 0, 7.0, 4.19.257, 5.15.64, f42a9819ba84bed2e609a4dff56af37063dcabdc, <4.20, 5.10.140, 6.0, <=6.19.*, <6.0, <5.5, <5.16, <=6.18.*, 5.4.212, 4.14.292, 8e7fb19f1a744fd34e982633ced756fee0498ef7, 661c01b2181d9413c799127f13143583b69f20fd, 5.19.6, <5.20, 6.19.6, 1678ca35b80a94d474fdc31e2497ce5d7ed52512, 6.18.16, a5a58fab556bfe618b4c9719eb85712d78c6cb10, 0dd84b319352bb8ba64752d4e45396d8b13e6018, <=*, 690b5c90fd2d81fd1d2b6110fa36783232f6dce2, <4.15, <24783dd06de870d646c25207bae186f78195f912) est présent sur votre parc.
- Appliquez le correctif ou la version corrigée indiqués dans les références de l'éditeur.
- À défaut de correctif, limitez l'exposition (filtrage réseau, désactivation du composant).
- Automatisez la détection : les agents CVE Heimdall (gratuits, open source) corrèlent l'inventaire de vos serveurs avec la base CVE.