{"api_version":"1","generated_at":"2026-09-18T12:13:44+00:00","cve":"CVE-2026-92492","urls":{"html":"https://cve.report/CVE-2026-92492","api":"https://cve.report/api/cve/CVE-2026-92492.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-92492","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-92492"},"summary":{"title":"cpufreq/amd-pstate: handle missing policy in dynamic EPP callbacks","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ncpufreq/amd-pstate: handle missing policy in dynamic EPP callbacks\n\ncpufreq_cpu_get() returns NULL when no cpufreq policy is associated with\nthe requested CPU, for example because the CPU is offline or the policy\nhas already been torn down.  Both amd_pstate_power_supply_notifier() and\namd_pstate_profile_set() acquire a policy via cpufreq_cpu_get() and then\npass that pointer to amd_pstate_get_balanced_epp() and\namd_pstate_set_epp(), which dereference it unconditionally.  A racing\nCPU hotplug or driver teardown can therefore lead to a NULL pointer\ndereference on either of these dynamic EPP paths.\n\nThe third cpufreq_cpu_get() caller in this file, amd_pstate_verify(),\nalready handles the NULL case.  Bring the two new callers in line with\nthat pattern: return NOTIFY_OK from the power-supply notifier (matching\nthe other \"nothing to do\" exits) and -ENODEV from amd_pstate_profile_set()\n(the usual cpufreq error for a missing CPU policy).\n\nFound by code inspection; not tested on hardware.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-09-17 17:17:51","updated_at":"2026-09-17 17:17:51"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/70c8c8b50d80f681f50ddcc66a9400dd87508913","name":"https://git.kernel.org/stable/c/70c8c8b50d80f681f50ddcc66a9400dd87508913","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/39c0cf62fc7851a17782e7efe8dfb2948739c681","name":"https://git.kernel.org/stable/c/39c0cf62fc7851a17782e7efe8dfb2948739c681","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/f4ade8d224756ab69f108204dde6777bac4664e4","name":"https://git.kernel.org/stable/c/f4ade8d224756ab69f108204dde6777bac4664e4","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-92492","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-92492","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 471d6659925aa0dcb4ab2520fa5ee3f49dfeab22 70c8c8b50d80f681f50ddcc66a9400dd87508913 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected e30ca6dd5345c5b8ba05f346a8e81105352fe571 f4ade8d224756ab69f108204dde6777bac4664e4 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected e30ca6dd5345c5b8ba05f346a8e81105352fe571 39c0cf62fc7851a17782e7efe8dfb2948739c681 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 7.1","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2.6 7.2.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.3-rc1 * 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/cpufreq/amd-pstate.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"70c8c8b50d80f681f50ddcc66a9400dd87508913","status":"affected","version":"471d6659925aa0dcb4ab2520fa5ee3f49dfeab22","versionType":"git"},{"lessThan":"f4ade8d224756ab69f108204dde6777bac4664e4","status":"affected","version":"e30ca6dd5345c5b8ba05f346a8e81105352fe571","versionType":"git"},{"lessThan":"39c0cf62fc7851a17782e7efe8dfb2948739c681","status":"affected","version":"e30ca6dd5345c5b8ba05f346a8e81105352fe571","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/cpufreq/amd-pstate.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"7.1"},{"lessThan":"7.1","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"7.2.*","status":"unaffected","version":"7.2.6","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.3-rc1","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2.6","versionStartIncluding":"7.1","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.3-rc1","versionStartIncluding":"7.1","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ncpufreq/amd-pstate: handle missing policy in dynamic EPP callbacks\n\ncpufreq_cpu_get() returns NULL when no cpufreq policy is associated with\nthe requested CPU, for example because the CPU is offline or the policy\nhas already been torn down.  Both amd_pstate_power_supply_notifier() and\namd_pstate_profile_set() acquire a policy via cpufreq_cpu_get() and then\npass that pointer to amd_pstate_get_balanced_epp() and\namd_pstate_set_epp(), which dereference it unconditionally.  A racing\nCPU hotplug or driver teardown can therefore lead to a NULL pointer\ndereference on either of these dynamic EPP paths.\n\nThe third cpufreq_cpu_get() caller in this file, amd_pstate_verify(),\nalready handles the NULL case.  Bring the two new callers in line with\nthat pattern: return NOTIFY_OK from the power-supply notifier (matching\nthe other \"nothing to do\" exits) and -ENODEV from amd_pstate_profile_set()\n(the usual cpufreq error for a missing CPU policy).\n\nFound by code inspection; not tested on hardware."}],"providerMetadata":{"dateUpdated":"2026-09-17T16:10:07.957Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/70c8c8b50d80f681f50ddcc66a9400dd87508913"},{"url":"https://git.kernel.org/stable/c/f4ade8d224756ab69f108204dde6777bac4664e4"},{"url":"https://git.kernel.org/stable/c/39c0cf62fc7851a17782e7efe8dfb2948739c681"}],"title":"cpufreq/amd-pstate: handle missing policy in dynamic EPP callbacks","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-92492","datePublished":"2026-09-17T16:10:07.957Z","dateReserved":"2026-09-16T12:21:13.871Z","dateUpdated":"2026-09-17T16:10:07.957Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-09-17 17:17:51","lastModifiedDate":"2026-09-17 17:17:51","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"92492","Ordinal":"1","Title":"cpufreq/amd-pstate: handle missing policy in dynamic EPP callbac","CVE":"CVE-2026-92492","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"92492","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\ncpufreq/amd-pstate: handle missing policy in dynamic EPP callbacks\n\ncpufreq_cpu_get() returns NULL when no cpufreq policy is associated with\nthe requested CPU, for example because the CPU is offline or the policy\nhas already been torn down.  Both amd_pstate_power_supply_notifier() and\namd_pstate_profile_set() acquire a policy via cpufreq_cpu_get() and then\npass that pointer to amd_pstate_get_balanced_epp() and\namd_pstate_set_epp(), which dereference it unconditionally.  A racing\nCPU hotplug or driver teardown can therefore lead to a NULL pointer\ndereference on either of these dynamic EPP paths.\n\nThe third cpufreq_cpu_get() caller in this file, amd_pstate_verify(),\nalready handles the NULL case.  Bring the two new callers in line with\nthat pattern: return NOTIFY_OK from the power-supply notifier (matching\nthe other \"nothing to do\" exits) and -ENODEV from amd_pstate_profile_set()\n(the usual cpufreq error for a missing CPU policy).\n\nFound by code inspection; not tested on hardware.","Type":"Description","Title":"cpufreq/amd-pstate: handle missing policy in dynamic EPP callbac"}]}}}