CVE-2026-72212

A flaw was found in the Linux kernel's memory hotplug subsystem. An error in the memory cleanup process, specifically when memory is added and then an issue occurs during device creation, can lead to incorrect handling of memory pages. This vulnerability can result in memory corruption, potentially causing system instability, crashes, or a Denial of Service (DoS) condition.

This vulnerability is rated as Moderate impact for Red Hat products because triggering it requires local privileged actions to perform memory hotplugging operations and depends on an uncommon failure condition during device initialization. The issue occurs only when the memmap_on_memory feature is active and device block creation fails, resulting in an unmapped memory state that can cause kernel instability or a denial of service. Standard enterprise deployments typically do not encounter this specific failure path during routine system operations.

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.