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CVE-2025-22126 is a use-after-free vulnerability in the Linux kernel MD/RAID subsystem. The md_notify_reboot() and md_exit() functions traverse all_mddevs using list_for_each_entry_safe(), but concurrent removal and freeing of the next mddev object can invalidate the saved iterator while the spinlock is released. When iteration resumes, the kernel can dereference freed memory. The fix replaces the iteration with list_for_each_entry() and introduces mddev_put_locked() to safely handle reference release, including cases where releasing the current mddev reference frees that object.
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A use-after-free vulnerability in the Linux kernel's md subsystem caused by a race between traversing the all_mddevs list and deleting an mddev object. The fix changes list traversal and introduces the mddev_put_locked() helper to manage object lifetimes safely. The reference assigns a CVSS v3 base score of 7.8, indicating local exploitation requiring low privileges, with potentially high confidentiality, integrity, and availability impacts.
A high-severity Linux kernel use-after-free vulnerability in the MD/RAID subsystem. A race condition during iteration of the all_mddevs list can result in dereferencing an mddev object after it has been freed. The issue is fixed in Google COS sys-kernel/csql-kernel-6_1 and sys-kernel/lakitu-kernel-6_1 version 18244.382.49 or later.
A vulnerability addressed by the referenced Alma Linux security update; technical flaw details are not provided.
A Linux kernel md subsystem use-after-free vulnerability involving iteration of the all_mddevs list.
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Cross-references every affected SKU, including bundled OEM variants.
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