CVE-2026-45968
kernel: cpuidle: Skip governor when only one idle state is available
Severity
LowRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · May 27, 2026
Updated · October 29, 2026
Description
A flaw was found in the Linux kernel's cpuidle subsystem. On certain PowerNV systems, when only a single idle state is available, the cpuidle ladder governor may incorrectly treat state 1 as usable. This can lead to an out-of-bounds index being passed, causing a NULL enter callback to be invoked and ultimately resulting in a system crash, leading to a denial of service.
CVSS score applicability
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
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.1 · 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-788 · Access of Memory Location After End of Buffer