CVE-2026-45968cpuidle: Skip governor when only one idle state is available
- 5.5MediumCVSS base score
- 0.13%Exploitation in 30 daysEPSS · top 97% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
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.
Timeline
ID reserved
By Linux
- 14 days later
· 14 days later
Published
- 5 months later
· 5 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Analyzed | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.13% · top 97% of all CVEs (14 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.5.
Affected products
- affected dc2251bf98c66db3f4e055b751968f0871037ae4 – < a0f7e804edc82e513d1ccb7c95ed8b351522ec81
- affected dc2251bf98c66db3f4e055b751968f0871037ae4 – < 5d103a38e2ae96eca57fd17161bcd29bd4622d1c
- affected dc2251bf98c66db3f4e055b751968f0871037ae4 – < 4da2b897283c39980d6ae09dc1560fcd937879e5
- affected dc2251bf98c66db3f4e055b751968f0871037ae4 – < 5c577ac939bca486cb02069505cfe47a5312ce02
- affected dc2251bf98c66db3f4e055b751968f0871037ae4 – < 8f6833d919bae915ead6c599a53e81e19b32da52
- affected dc2251bf98c66db3f4e055b751968f0871037ae4 – < 63ae78336f40bcd9a44952a7c6bafb9c88a8effd
- affected dc2251bf98c66db3f4e055b751968f0871037ae4 – < a0724e40a58a0e323c59707edeae5b71d15800dc
- affected dc2251bf98c66db3f4e055b751968f0871037ae4 – < e5c9ffc6ae1bcdb1062527d611043681ac301aca
- affected 4.14
- unaffected < 4.14
- unaffected 5.10.252 – ≤ 5.10.*
- unaffected 5.15.202 – ≤ 5.15.*
- unaffected 6.1.165 – ≤ 6.1.*
- unaffected 6.6.128 – ≤ 6.6.*
- unaffected 6.12.75 – ≤ 6.12.*
- unaffected 6.18.14 – ≤ 6.18.*
- unaffected 6.19.4 – ≤ 6.19.*
- unaffected 7.0 – ≤ *
References
References8
- https://git.kernel.org/stable/c/a0f7e804edc82e513d1ccb7c95ed8b351522ec81 (opens in a new tab)
- https://git.kernel.org/stable/c/5d103a38e2ae96eca57fd17161bcd29bd4622d1c (opens in a new tab)
- https://git.kernel.org/stable/c/4da2b897283c39980d6ae09dc1560fcd937879e5 (opens in a new tab)
- https://git.kernel.org/stable/c/5c577ac939bca486cb02069505cfe47a5312ce02 (opens in a new tab)
- https://git.kernel.org/stable/c/8f6833d919bae915ead6c599a53e81e19b32da52 (opens in a new tab)
- https://git.kernel.org/stable/c/63ae78336f40bcd9a44952a7c6bafb9c88a8effd (opens in a new tab)
- https://git.kernel.org/stable/c/a0724e40a58a0e323c59707edeae5b71d15800dc (opens in a new tab)
- https://git.kernel.org/stable/c/e5c9ffc6ae1bcdb1062527d611043681ac301aca (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-32252 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-45968)Record last updated .