{"api_version":"1","generated_at":"2026-08-28T16:25:21+00:00","cve":"CVE-2026-80611","urls":{"html":"https://cve.report/CVE-2026-80611","api":"https://cve.report/api/cve/CVE-2026-80611.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-80611","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-80611"},"summary":{"title":"ACPI: processor_idle: Mark LPI enter functions as __cpuidle","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nACPI: processor_idle: Mark LPI enter functions as __cpuidle\n\nWhen function tracing or Kprobes is enabled, entering an ACPI Low\nPower Idle (LPI) state triggers the following RCU splat:\n\n  RCU not on for: acpi_idle_lpi_enter+0x4/0xd8\n  WARNING: CPU: 8 PID: 0 at include/linux/trace_recursion.h:162 function_trace_call+0x1e8/0x228\n\nThe acpi_idle_lpi_enter() function is invoked within the cpuidle\npath after RCU has already been disabled for the current local CPU.\nConsequently, ftrace's function_trace_call() expects RCU to be\nactively watching before recording trace data, emitting a warning\nif it is not.\n\nFix this by annotating acpi_idle_lpi_enter(), the generic __weak\nstub, and the RISC-V implementation of acpi_processor_ffh_lpi_enter()\nwith __cpuidle. This moves these functions into the '.cpuidle.text'\nsection, implicitly disabling ftrace instrumentation (notrace) along\nthis sensitive path and preventing trace-induced RCU warnings during\nidle entry.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-08-28 08:16:45","updated_at":"2026-08-28 08:16:45"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/10f675902a5fc88ccfe34bb8aa37de50806b03b1","name":"https://git.kernel.org/stable/c/10f675902a5fc88ccfe34bb8aa37de50806b03b1","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/8bbe4dd7964552f74c271c3a8d95a4331a8ab5f9","name":"https://git.kernel.org/stable/c/8bbe4dd7964552f74c271c3a8d95a4331a8ab5f9","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/956ca5d72c76504824c8eb601879da9476973e15","name":"https://git.kernel.org/stable/c/956ca5d72c76504824c8eb601879da9476973e15","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/5b6165d7ec38477e8cfa41bfa464959957953822","name":"https://git.kernel.org/stable/c/5b6165d7ec38477e8cfa41bfa464959957953822","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-80611","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-80611","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected a36a7fecfe6071732075ad5aa31196adce13181b 10f675902a5fc88ccfe34bb8aa37de50806b03b1 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected a36a7fecfe6071732075ad5aa31196adce13181b 5b6165d7ec38477e8cfa41bfa464959957953822 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected a36a7fecfe6071732075ad5aa31196adce13181b 8bbe4dd7964552f74c271c3a8d95a4331a8ab5f9 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected a36a7fecfe6071732075ad5aa31196adce13181b 956ca5d72c76504824c8eb601879da9476973e15 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 4.8","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 4.8 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.97 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.40 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1.5 7.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/acpi/processor_idle.c","drivers/acpi/riscv/cpuidle.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"10f675902a5fc88ccfe34bb8aa37de50806b03b1","status":"affected","version":"a36a7fecfe6071732075ad5aa31196adce13181b","versionType":"git"},{"lessThan":"5b6165d7ec38477e8cfa41bfa464959957953822","status":"affected","version":"a36a7fecfe6071732075ad5aa31196adce13181b","versionType":"git"},{"lessThan":"8bbe4dd7964552f74c271c3a8d95a4331a8ab5f9","status":"affected","version":"a36a7fecfe6071732075ad5aa31196adce13181b","versionType":"git"},{"lessThan":"956ca5d72c76504824c8eb601879da9476973e15","status":"affected","version":"a36a7fecfe6071732075ad5aa31196adce13181b","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/acpi/processor_idle.c","drivers/acpi/riscv/cpuidle.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"4.8"},{"lessThan":"4.8","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.97","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.40","versionType":"semver"},{"lessThanOrEqual":"7.1.*","status":"unaffected","version":"7.1.5","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.2","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.97","versionStartIncluding":"4.8","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.40","versionStartIncluding":"4.8","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1.5","versionStartIncluding":"4.8","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2","versionStartIncluding":"4.8","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nACPI: processor_idle: Mark LPI enter functions as __cpuidle\n\nWhen function tracing or Kprobes is enabled, entering an ACPI Low\nPower Idle (LPI) state triggers the following RCU splat:\n\n  RCU not on for: acpi_idle_lpi_enter+0x4/0xd8\n  WARNING: CPU: 8 PID: 0 at include/linux/trace_recursion.h:162 function_trace_call+0x1e8/0x228\n\nThe acpi_idle_lpi_enter() function is invoked within the cpuidle\npath after RCU has already been disabled for the current local CPU.\nConsequently, ftrace's function_trace_call() expects RCU to be\nactively watching before recording trace data, emitting a warning\nif it is not.\n\nFix this by annotating acpi_idle_lpi_enter(), the generic __weak\nstub, and the RISC-V implementation of acpi_processor_ffh_lpi_enter()\nwith __cpuidle. This moves these functions into the '.cpuidle.text'\nsection, implicitly disabling ftrace instrumentation (notrace) along\nthis sensitive path and preventing trace-induced RCU warnings during\nidle entry."}],"providerMetadata":{"dateUpdated":"2026-08-28T06:48:33.934Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/10f675902a5fc88ccfe34bb8aa37de50806b03b1"},{"url":"https://git.kernel.org/stable/c/5b6165d7ec38477e8cfa41bfa464959957953822"},{"url":"https://git.kernel.org/stable/c/8bbe4dd7964552f74c271c3a8d95a4331a8ab5f9"},{"url":"https://git.kernel.org/stable/c/956ca5d72c76504824c8eb601879da9476973e15"}],"title":"ACPI: processor_idle: Mark LPI enter functions as __cpuidle","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-80611","datePublished":"2026-08-28T06:48:33.934Z","dateReserved":"2026-08-26T14:34:25.773Z","dateUpdated":"2026-08-28T06:48:33.934Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-08-28 08:16:45","lastModifiedDate":"2026-08-28 08:16:45","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"80611","Ordinal":"1","Title":"ACPI: processor_idle: Mark LPI enter functions as __cpuidle","CVE":"CVE-2026-80611","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"80611","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nACPI: processor_idle: Mark LPI enter functions as __cpuidle\n\nWhen function tracing or Kprobes is enabled, entering an ACPI Low\nPower Idle (LPI) state triggers the following RCU splat:\n\n  RCU not on for: acpi_idle_lpi_enter+0x4/0xd8\n  WARNING: CPU: 8 PID: 0 at include/linux/trace_recursion.h:162 function_trace_call+0x1e8/0x228\n\nThe acpi_idle_lpi_enter() function is invoked within the cpuidle\npath after RCU has already been disabled for the current local CPU.\nConsequently, ftrace's function_trace_call() expects RCU to be\nactively watching before recording trace data, emitting a warning\nif it is not.\n\nFix this by annotating acpi_idle_lpi_enter(), the generic __weak\nstub, and the RISC-V implementation of acpi_processor_ffh_lpi_enter()\nwith __cpuidle. This moves these functions into the '.cpuidle.text'\nsection, implicitly disabling ftrace instrumentation (notrace) along\nthis sensitive path and preventing trace-induced RCU warnings during\nidle entry.","Type":"Description","Title":"ACPI: processor_idle: Mark LPI enter functions as __cpuidle"}]}}}