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.
References
Configurations
Configuration 1 (hide)
|
History
16 Jun 2026, 02:43
| Type | Values Removed | Values Added |
|---|---|---|
| CWE | CWE-476 | |
| CPE | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | |
| First Time |
Linux linux Kernel
Linux |
|
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 5.5 |
| References | () https://git.kernel.org/stable/c/4da2b897283c39980d6ae09dc1560fcd937879e5 - Patch | |
| References | () https://git.kernel.org/stable/c/5c577ac939bca486cb02069505cfe47a5312ce02 - Patch | |
| References | () https://git.kernel.org/stable/c/5d103a38e2ae96eca57fd17161bcd29bd4622d1c - Patch | |
| References | () https://git.kernel.org/stable/c/63ae78336f40bcd9a44952a7c6bafb9c88a8effd - Patch | |
| References | () https://git.kernel.org/stable/c/8f6833d919bae915ead6c599a53e81e19b32da52 - Patch | |
| References | () https://git.kernel.org/stable/c/a0724e40a58a0e323c59707edeae5b71d15800dc - Patch | |
| References | () https://git.kernel.org/stable/c/a0f7e804edc82e513d1ccb7c95ed8b351522ec81 - Patch | |
| References | () https://git.kernel.org/stable/c/e5c9ffc6ae1bcdb1062527d611043681ac301aca - Patch |
27 May 2026, 14:17
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2026-05-27 14:17
Updated : 2026-06-16 02:43
NVD link : CVE-2026-45968
Mitre link : CVE-2026-45968
CVE.ORG link : CVE-2026-45968
JSON object : View
Products Affected
linux
- linux_kernel
CWE
CWE-476
NULL Pointer Dereference