{"id":"CVE-2026-92492","title":"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 exam…","summary":"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 exam…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 471d6659925aa0dcb4ab2520fa5ee3f49dfeab22 < 70c8c8b50d80f681f50ddcc66a9400dd87508913","Linux >= e30ca6dd5345c5b8ba05f346a8e81105352fe571 < f4ade8d224756ab69f108204dde6777bac4664e4","Linux >= e30ca6dd5345c5b8ba05f346a8e81105352fe571 < 39c0cf62fc7851a17782e7efe8dfb2948739c681","Linux 7.1"],"published":"2026-09-17","updated":"2026-09-17","sourceUpdated":"2026-09-17T17:17:51.340","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-92492","references":[{"url":"https://git.kernel.org/stable/c/39c0cf62fc7851a17782e7efe8dfb2948739c681","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/70c8c8b50d80f681f50ddcc66a9400dd87508913","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/f4ade8d224756ab69f108204dde6777bac4664e4","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"tags":["nvd","cve.org"],"ingestedAt":"2026-09-17T16:21:47.784Z","epss":0.00198,"epssPercentile":0.09864,"slug":"CVE-2026-92492","body":"## Overview\n\nIn 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}