CVE-2026-45968

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