cpufreq/amd-pstate: handle missing policy in dynamic EPP callbacks (CVE-2026-92492) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-92492

cpufreq/amd-pstate: handle missing policy in dynamic EPP callbacks

Answer in brief

CVE-2026-92492 records a Unknown severity vulnerability in cpufreq/amd-pstate: handle missing policy in dynamic EPP callbacks. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 17, 2026Updated Sep 17, 2026Source checked Sep 17, 2026First seen by HOL Sep 17, 2026Material review Sep 17, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
Fix availability: Available

Why this deserves its current priority

A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Linux/Linuxgeneric	>=471d6659925aa0dcb4ab2520fa5ee3f49dfeab22 <70c8c8b50d80f681f50ddcc66a9400dd87508913 \|\| >=e30ca6dd5345c5b8ba05f346a8e81105352fe571 <f4ade8d224756ab69f108204dde6777bac4664e4 \|\| >=e30ca6dd5345c5b8ba05f346a8e81105352fe571 <39c0cf62fc7851a17782e7efe8dfb2948739c681	70c8c8b50d80f681f50ddcc66a9400dd87508913, f4ade8d224756ab69f108204dde6777bac4664e4, 39c0cf62fc7851a17782e7efe8dfb2948739c681
Linux/Linuxgeneric	7.1	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to 70c8c8b50d80f681f50ddcc66a9400dd87508913 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Sep 17, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 17, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 17, 2026

Sources and claim methodology

Upstream source description

In the Linux kernel, the following vulnerability has been resolved: cpufreq/amd-pstate: handle missing policy in dynamic EPP callbacks cpufreq_cpu_get() returns NULL when no cpufreq policy is associated with the requested CPU, for example because the CPU is offline or the policy has already been torn down. Both amd_pstate_power_supply_notifier() and amd_pstate_profile_set() acquire a policy via cpufreq_cpu_get() and then pass that pointer to amd_pstate_get_balanced_epp() and amd_pstate_set_epp(), which dereference it unconditionally. A racing CPU hotplug or driver teardown can therefore lead to a NULL pointer dereference on either of these dynamic EPP paths. The third cpufreq_cpu_get() caller in this file, amd_pstate_verify(), already handles the NULL case. Bring the two new callers in line with that pattern: return NOTIFY_OK from the power-supply notifier (matching the other "nothing to do" exits) and -ENODEV from amd_pstate_profile_set() (the usual cpufreq error for a missing CPU policy). Found by code inspection; not tested on hardware.

Quoted source text, attributed separately from HOL analysis.