In the Linux kernel, the following vulnerability has been resolved: cpuidle: Skip governor when only one idle state is available On certain platforms (PowerNV systems without a power-mgt DT node), cpuidle may register only a single idle state. In cases where that single state is a polling state (state 0), the ladder governor may incorrectly treat state 1 as the first usable state and pass an out-of-bounds index. This can lead to a NULL enter callback being invoked, ultimately resulting in a system crash. [ 13.342636] cpuidle-powernv : Only Snooze is available [ 13.351854] Faulting instruction address: 0x00000000 [ 13.376489] NIP [0000000000000000] 0x0 [ 13.378351] LR [c000000001e01974] cpuidle_enter_state+0x2c4/0x668 Fix this by adding a bail-out in cpuidle_select() that returns state 0 directly when state_count <= 1, bypassing the governor and keeping the tick running.

Metrics

No CVSS v4.0

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

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Affected Vendors & Products

Vendors Products
Linux
  • Linux Kernel

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References
Link Providers
https://git.kernel.org/stable/c/4da2b897283c39980d6ae09dc1560fcd937879e5 cve-icon cve-icon
https://git.kernel.org/stable/c/5c577ac939bca486cb02069505cfe47a5312ce02 cve-icon cve-icon
https://git.kernel.org/stable/c/5d103a38e2ae96eca57fd17161bcd29bd4622d1c cve-icon cve-icon
https://git.kernel.org/stable/c/63ae78336f40bcd9a44952a7c6bafb9c88a8effd cve-icon cve-icon
https://git.kernel.org/stable/c/8f6833d919bae915ead6c599a53e81e19b32da52 cve-icon cve-icon
https://git.kernel.org/stable/c/a0724e40a58a0e323c59707edeae5b71d15800dc cve-icon cve-icon
https://git.kernel.org/stable/c/a0f7e804edc82e513d1ccb7c95ed8b351522ec81 cve-icon cve-icon
https://git.kernel.org/stable/c/e5c9ffc6ae1bcdb1062527d611043681ac301aca cve-icon cve-icon
History

Wed, 27 May 2026 14:15:00 +0000

Type Values Removed Values Added
Description In the Linux kernel, the following vulnerability has been resolved: cpuidle: Skip governor when only one idle state is available On certain platforms (PowerNV systems without a power-mgt DT node), cpuidle may register only a single idle state. In cases where that single state is a polling state (state 0), the ladder governor may incorrectly treat state 1 as the first usable state and pass an out-of-bounds index. This can lead to a NULL enter callback being invoked, ultimately resulting in a system crash. [ 13.342636] cpuidle-powernv : Only Snooze is available [ 13.351854] Faulting instruction address: 0x00000000 [ 13.376489] NIP [0000000000000000] 0x0 [ 13.378351] LR [c000000001e01974] cpuidle_enter_state+0x2c4/0x668 Fix this by adding a bail-out in cpuidle_select() that returns state 0 directly when state_count <= 1, bypassing the governor and keeping the tick running.
Title cpuidle: Skip governor when only one idle state is available
First Time appeared Linux
Linux linux Kernel
CPEs cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Vendors & Products Linux
Linux linux Kernel
References
cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published:

Updated: 2026-05-27T12:18:27.247Z

Reserved: 2026-05-13T15:03:33.089Z

Link: CVE-2026-45968

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-05-27T14:17:13.670

Modified: 2026-05-27T14:48:03.013

Link: CVE-2026-45968

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

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