CVE-2026-80611

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-80611", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-26T14:34:25.773Z", "datePublished": "2026-08-28T06:48:33.934Z", "dateUpdated": "2026-10-30T12:30:42.384Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-30T12:30:42.384Z"}, "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."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/acpi/processor_idle.c", "drivers/acpi/riscv/cpuidle.c"], "versions": [{"version": "a36a7fecfe6071732075ad5aa31196adce13181b", "lessThan": "8ca5dfe4249bbb6bd34f37d16c2ea933c31f6a2a", "status": "affected", "versionType": "git"}, {"version": "a36a7fecfe6071732075ad5aa31196adce13181b", "lessThan": "c17fe25dcb55ab94f6aa2930b7504ea666d5fcc2", "status": "affected", "versionType": "git"}, {"version": "a36a7fecfe6071732075ad5aa31196adce13181b", "lessThan": "10f675902a5fc88ccfe34bb8aa37de50806b03b1", "status": "affected", "versionType": "git"}, {"version": "a36a7fecfe6071732075ad5aa31196adce13181b", "lessThan": "5b6165d7ec38477e8cfa41bfa464959957953822", "status": "affected", "versionType": "git"}, {"version": "a36a7fecfe6071732075ad5aa31196adce13181b", "lessThan": "8bbe4dd7964552f74c271c3a8d95a4331a8ab5f9", "status": "affected", "versionType": "git"}, {"version": "a36a7fecfe6071732075ad5aa31196adce13181b", "lessThan": "956ca5d72c76504824c8eb601879da9476973e15", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/acpi/processor_idle.c", "drivers/acpi/riscv/cpuidle.c"], "versions": [{"version": "4.8", "status": "affected"}, {"version": "0", "lessThan": "4.8", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.191", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.160", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.97", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.40", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1.5", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.8", "versionEndExcluding": "6.1.191"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.8", "versionEndExcluding": "6.6.160"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.8", "versionEndExcluding": "6.12.97"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.8", "versionEndExcluding": "6.18.40"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.8", "versionEndExcluding": "7.1.5"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.8", "versionEndExcluding": "7.2"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/8ca5dfe4249bbb6bd34f37d16c2ea933c31f6a2a"}, {"url": "https://git.kernel.org/stable/c/c17fe25dcb55ab94f6aa2930b7504ea666d5fcc2"}, {"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"}}}}

{}

{"affected": [{"affectedData": [{"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": "8ca5dfe4249bbb6bd34f37d16c2ea933c31f6a2a", "status": "affected", "version": "a36a7fecfe6071732075ad5aa31196adce13181b", "versionType": "git"}, {"lessThan": "c17fe25dcb55ab94f6aa2930b7504ea666d5fcc2", "status": "affected", "version": "a36a7fecfe6071732075ad5aa31196adce13181b", "versionType": "git"}, {"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": "6.1.*", "status": "unaffected", "version": "6.1.191", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.160", "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"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "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."}], "id": "CVE-2026-80611", "lastModified": "2026-10-30T13:20:07.877", "metrics": {}, "published": "2026-08-28T08:16:45.080", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/10f675902a5fc88ccfe34bb8aa37de50806b03b1"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/5b6165d7ec38477e8cfa41bfa464959957953822"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/8bbe4dd7964552f74c271c3a8d95a4331a8ab5f9"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/8ca5dfe4249bbb6bd34f37d16c2ea933c31f6a2a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/956ca5d72c76504824c8eb601879da9476973e15"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/c17fe25dcb55ab94f6aa2930b7504ea666d5fcc2"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: ACPI: processor_idle: Mark LPI enter functions as __cpuidle", "id": "2525475", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2525475"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-820", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nACPI: processor_idle: Mark LPI enter functions as __cpuidle\nWhen function tracing or Kprobes is enabled, entering an ACPI Low\nPower Idle (LPI) state triggers the following RCU splat:\nRCU not on for: acpi_idle_lpi_enter+0x4/0xd8\nWARNING: CPU: 8 PID: 0 at include/linux/trace_recursion.h:162 function_trace_call+0x1e8/0x228\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.\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.", "A flaw was found in the Linux kernel's Advanced Configuration and Power Interface (ACPI) processor idle functionality. When kernel tracing features, such as function tracing or Kprobes, are enabled, entering a Low Power Idle (LPI) state can trigger a Read-Copy Update (RCU) warning. This occurs because the system attempts to record trace data after RCU has been disabled for the current CPU, leading to diagnostic errors. The primary consequence is system instability or unexpected behavior related to kernel tracing mechanisms."], "name": "CVE-2026-80611", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-08-28T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-80611\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-80611\nhttps://lore.kernel.org/linux-cve-announce/2026082834-CVE-2026-80611-a5cd@gregkh/T"], "threat_severity": "Low"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[a36a7fecfe6071732075ad5aa31196adce13181b,10f675902a5fc88ccfe34bb8aa37de50806b03b1)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[a36a7fecfe6071732075ad5aa31196adce13181b,5b6165d7ec38477e8cfa41bfa464959957953822)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[a36a7fecfe6071732075ad5aa31196adce13181b,8bbe4dd7964552f74c271c3a8d95a4331a8ab5f9)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[a36a7fecfe6071732075ad5aa31196adce13181b,956ca5d72c76504824c8eb601879da9476973e15)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "4.8"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,4.8)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.12.97,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.18.40,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.1.5,7.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-08-28T09:45:17.383508+00:00", "updated": "2026-09-02T05:45:04.844881+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}