CVE-2026-89992

A flaw was found in the Linux kernel. The dt_idle_pd_free() function in the cpuidle subsystem attempts to free a memory region using an incorrect pointer, which is not the start of the original allocation. This memory corruption vulnerability can lead to a system crash, resulting in a Denial of Service (DoS).

This vulnerability is rated as Moderate severity because it requires local access and primarily results in a denial of service via a kernel panic. In Red Hat environments, the issue resides in the kernel's Device Tree CPU idle power domain subsystem, where releasing an invalid pointer during memory deallocation causes corruption. The risk is limited to platforms configured with Device Tree power domains and cannot be triggered remotely.

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.

Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.