{"api_version":"1","generated_at":"2026-05-30T12:19:04+00:00","cve":"CVE-2026-45968","urls":{"html":"https://cve.report/CVE-2026-45968","api":"https://cve.report/api/cve/CVE-2026-45968.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-45968","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-45968"},"summary":{"title":"cpuidle: Skip governor when only one idle state is available","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ncpuidle: Skip governor when only one idle state is available\n\nOn certain platforms (PowerNV systems without a power-mgt DT node),\ncpuidle may register only a single idle state. In cases where that\nsingle state is a polling state (state 0), the ladder governor may\nincorrectly treat state 1 as the first usable state and pass an\nout-of-bounds index. This can lead to a NULL enter callback being\ninvoked, ultimately resulting in a system crash.\n\n[   13.342636] cpuidle-powernv : Only Snooze is available\n[   13.351854] Faulting instruction address: 0x00000000\n[   13.376489] NIP [0000000000000000] 0x0\n[   13.378351] LR  [c000000001e01974] cpuidle_enter_state+0x2c4/0x668\n\nFix this by adding a bail-out in cpuidle_select() that returns state 0\ndirectly when state_count <= 1, bypassing the governor and keeping the\ntick running.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-05-27 14:17:13","updated_at":"2026-05-27 14:48:03"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/8f6833d919bae915ead6c599a53e81e19b32da52","name":"https://git.kernel.org/stable/c/8f6833d919bae915ead6c599a53e81e19b32da52","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/5d103a38e2ae96eca57fd17161bcd29bd4622d1c","name":"https://git.kernel.org/stable/c/5d103a38e2ae96eca57fd17161bcd29bd4622d1c","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/63ae78336f40bcd9a44952a7c6bafb9c88a8effd","name":"https://git.kernel.org/stable/c/63ae78336f40bcd9a44952a7c6bafb9c88a8effd","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/5c577ac939bca486cb02069505cfe47a5312ce02","name":"https://git.kernel.org/stable/c/5c577ac939bca486cb02069505cfe47a5312ce02","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/a0724e40a58a0e323c59707edeae5b71d15800dc","name":"https://git.kernel.org/stable/c/a0724e40a58a0e323c59707edeae5b71d15800dc","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/e5c9ffc6ae1bcdb1062527d611043681ac301aca","name":"https://git.kernel.org/stable/c/e5c9ffc6ae1bcdb1062527d611043681ac301aca","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/4da2b897283c39980d6ae09dc1560fcd937879e5","name":"https://git.kernel.org/stable/c/4da2b897283c39980d6ae09dc1560fcd937879e5","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/a0f7e804edc82e513d1ccb7c95ed8b351522ec81","name":"https://git.kernel.org/stable/c/a0f7e804edc82e513d1ccb7c95ed8b351522ec81","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-45968","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-45968","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected dc2251bf98c66db3f4e055b751968f0871037ae4 a0f7e804edc82e513d1ccb7c95ed8b351522ec81 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected dc2251bf98c66db3f4e055b751968f0871037ae4 5d103a38e2ae96eca57fd17161bcd29bd4622d1c git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected dc2251bf98c66db3f4e055b751968f0871037ae4 4da2b897283c39980d6ae09dc1560fcd937879e5 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected dc2251bf98c66db3f4e055b751968f0871037ae4 5c577ac939bca486cb02069505cfe47a5312ce02 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 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semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.15.202 5.15.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.165 6.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.128 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.75 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.14 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.19.4 6.19.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.0 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"45968","cve":"CVE-2026-45968","epss":"0.000240000","percentile":"0.073930000","score_date":"2026-05-29","updated_at":"2026-05-30 00:13:24"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/cpuidle/cpuidle.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"a0f7e804edc82e513d1ccb7c95ed8b351522ec81","status":"affected","version":"dc2251bf98c66db3f4e055b751968f0871037ae4","versionType":"git"},{"lessThan":"5d103a38e2ae96eca57fd17161bcd29bd4622d1c","status":"affected","version":"dc2251bf98c66db3f4e055b751968f0871037ae4","versionType":"git"},{"lessThan":"4da2b897283c39980d6ae09dc1560fcd937879e5","status":"affected","version":"dc2251bf98c66db3f4e055b751968f0871037ae4","versionType":"git"},{"lessThan":"5c577ac939bca486cb02069505cfe47a5312ce02","status":"affected","version":"dc2251bf98c66db3f4e055b751968f0871037ae4","versionType":"git"},{"lessThan":"8f6833d919bae915ead6c599a53e81e19b32da52","status":"affected","version":"dc2251bf98c66db3f4e055b751968f0871037ae4","versionType":"git"},{"lessThan":"63ae78336f40bcd9a44952a7c6bafb9c88a8effd","status":"affected","version":"dc2251bf98c66db3f4e055b751968f0871037ae4","versionType":"git"},{"lessThan":"a0724e40a58a0e323c59707edeae5b71d15800dc","status":"affected","version":"dc2251bf98c66db3f4e055b751968f0871037ae4","versionType":"git"},{"lessThan":"e5c9ffc6ae1bcdb1062527d611043681ac301aca","status":"affected","version":"dc2251bf98c66db3f4e055b751968f0871037ae4","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/cpuidle/cpuidle.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"4.14"},{"lessThan":"4.14","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.10.*","status":"unaffected","version":"5.10.252","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.202","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.165","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.128","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.75","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.14","versionType":"semver"},{"lessThanOrEqual":"6.19.*","status":"unaffected","version":"6.19.4","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.0","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.10.252","versionStartIncluding":"4.14","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.15.202","versionStartIncluding":"4.14","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.165","versionStartIncluding":"4.14","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.128","versionStartIncluding":"4.14","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.75","versionStartIncluding":"4.14","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.14","versionStartIncluding":"4.14","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.19.4","versionStartIncluding":"4.14","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.0","versionStartIncluding":"4.14","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ncpuidle: Skip governor when only one idle state is available\n\nOn certain platforms (PowerNV systems without a power-mgt DT node),\ncpuidle may register only a single idle state. In cases where that\nsingle state is a polling state (state 0), the ladder governor may\nincorrectly treat state 1 as the first usable state and pass an\nout-of-bounds index. This can lead to a NULL enter callback being\ninvoked, ultimately resulting in a system crash.\n\n[   13.342636] cpuidle-powernv : Only Snooze is available\n[   13.351854] Faulting instruction address: 0x00000000\n[   13.376489] NIP [0000000000000000] 0x0\n[   13.378351] LR  [c000000001e01974] cpuidle_enter_state+0x2c4/0x668\n\nFix this by adding a bail-out in cpuidle_select() that returns state 0\ndirectly when state_count <= 1, bypassing the governor and keeping the\ntick running."}],"providerMetadata":{"dateUpdated":"2026-05-27T12:18:27.247Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/a0f7e804edc82e513d1ccb7c95ed8b351522ec81"},{"url":"https://git.kernel.org/stable/c/5d103a38e2ae96eca57fd17161bcd29bd4622d1c"},{"url":"https://git.kernel.org/stable/c/4da2b897283c39980d6ae09dc1560fcd937879e5"},{"url":"https://git.kernel.org/stable/c/5c577ac939bca486cb02069505cfe47a5312ce02"},{"url":"https://git.kernel.org/stable/c/8f6833d919bae915ead6c599a53e81e19b32da52"},{"url":"https://git.kernel.org/stable/c/63ae78336f40bcd9a44952a7c6bafb9c88a8effd"},{"url":"https://git.kernel.org/stable/c/a0724e40a58a0e323c59707edeae5b71d15800dc"},{"url":"https://git.kernel.org/stable/c/e5c9ffc6ae1bcdb1062527d611043681ac301aca"}],"title":"cpuidle: Skip governor when only one idle state is available","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-45968","datePublished":"2026-05-27T12:18:27.247Z","dateReserved":"2026-05-13T15:03:33.089Z","dateUpdated":"2026-05-27T12:18:27.247Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-05-27 14:17:13","lastModifiedDate":"2026-05-27 14:48:03","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"45968","Ordinal":"1","Title":"cpuidle: Skip governor when only one idle state is available","CVE":"CVE-2026-45968","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"45968","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\ncpuidle: Skip governor when only one idle state is available\n\nOn certain platforms (PowerNV systems without a power-mgt DT node),\ncpuidle may register only a single idle state. In cases where that\nsingle state is a polling state (state 0), the ladder governor may\nincorrectly treat state 1 as the first usable state and pass an\nout-of-bounds index. This can lead to a NULL enter callback being\ninvoked, ultimately resulting in a system crash.\n\n[   13.342636] cpuidle-powernv : Only Snooze is available\n[   13.351854] Faulting instruction address: 0x00000000\n[   13.376489] NIP [0000000000000000] 0x0\n[   13.378351] LR  [c000000001e01974] cpuidle_enter_state+0x2c4/0x668\n\nFix this by adding a bail-out in cpuidle_select() that returns state 0\ndirectly when state_count <= 1, bypassing the governor and keeping the\ntick running.","Type":"Description","Title":"cpuidle: Skip governor when only one idle state is available"}]}}}