CVE-2026-89568

A flaw was found in the Linux kernel. The kho_preserved_memory_reserve() function, responsible for reserving memory, incorrectly calculates the size of these reservations. This issue arises because it uses a 32-bit integer for bit shifting, which limits the maximum reservation size to 2 Gigabytes (GiB). Consequently, attempts to reserve memory larger than 2 GiB can lead to undefined behavior, potentially causing system instability or a denial of service.

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.