CVE-2026-89986

A flaw was found in the Linux kernel. An improper memory allocation, referred to as a sleeping allocation, occurs within the alloc_pages_bulk_weighted_interleave() function when a task has an MPOL_WEIGHTED_INTERLEAVE memory policy. This can lead to a kernel crash, resulting in a Denial of Service (DoS) for the system.

This vulnerability is rated as Low severity because triggering it requires local access and the explicit configuration of non-default NUMA weighted interleave memory policies on running processes. The issue stems from memory allocations invoked during atomic operations, which can destabilize the kernel or trigger a denial of service splat without exposing confidential data or permitting code execution. Earlier enterprise platforms such as RHEL 8 and 9 lack the affected code, restricting exposure to newer environments running customized memory-interleaving workloads.

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.