{"id":"CVE-2026-92492","revision":"8e327e471cf945909460cd8789f298b3","records":[{"revision":"8e327e471cf945909460cd8789f298b3","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-92492","aliases":[],"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":0,"publishedAt":"2026-09-17T16:10:07.957+00:00","modifiedAt":"2026-10-19T09:03:58.605+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"drivers/cpufreq/amd-pstate.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"471d6659925aa0dcb4ab2520fa5ee3f49dfeab22\",\n                            \"lessThan\": \"70c8c8b50d80f681f50ddcc66a9400dd87508913\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"e30ca6dd5345c5b8ba05f346a8e81105352fe571\",\n                            \"lessThan\": \"f4ade8d224756ab69f108204dde6777bac4664e4\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"e30ca6dd5345c5b8ba05f346a8e81105352fe571\",\n                            \"lessThan\": \"39c0cf62fc7851a17782e7efe8dfb2948739c681\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"drivers/cpufreq/amd-pstate.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"7.1\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"7.1\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2.6\",\n                            \"lessThanOrEqual\": \"7.2.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.3\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[],"references":["https://git.kernel.org/stable/c/70c8c8b50d80f681f50ddcc66a9400dd87508913","https://git.kernel.org/stable/c/f4ade8d224756ab69f108204dde6777bac4664e4","https://git.kernel.org/stable/c/39c0cf62fc7851a17782e7efe8dfb2948739c681"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-92492","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-92492","identifiers":["CVE-2026-92492"]},"retained":false,"historicalAffected":[]}],"coverage":[]}