CVE-2026-97427
Received Received - Intake

Heap Overflow in AMDGPU PowerPlay Driver

Publication date: 2026-09-24

Last updated on: 2026-09-24

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: drm/amd/pm: bound pp_dpm_set_pp_table() memcpy The powerplay path allocates hardcode_pp_table once with kmemdup(..., soft_pp_table_size). memcpy(..., size) used the sysfs store count (up to PAGE_SIZE) with no upper bound, causing heap overflow. Reject writes where size exceeds soft_pp_table_size.

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Meta Information

Published
2026-09-24
Last Modified
2026-09-24
Generated
2026-09-24
AI Q&A
2026-09-24
EPSS Evaluated
N/A
NVD
CVE-2026-97427
EUVD
EUVD-2026-86040

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
linux linux_kernel *

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Exploitability

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CWE ID Description
CWE-UNKNOWN

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Executive Summary

This is a heap overflow vulnerability in the Linux kernel's AMD powerplay (AMDGPU) driver. The issue occurs in the pp_dpm_set_pp_table() function where a memcpy operation uses an unchecked sysfs store count (up to PAGE_SIZE) instead of the allocated buffer size. This allows writes exceeding the intended soft_pp_table_size, leading to memory corruption.

Detection Guidance

This vulnerability involves a heap overflow in the Linux kernel's AMD powerplay driver due to improper bounds checking during sysfs writes. Detection requires checking kernel logs for related errors or monitoring sysfs writes to the affected AMD PM interface.

Impact Analysis

This vulnerability could allow local attackers to cause memory corruption, leading to system crashes, privilege escalation, or arbitrary code execution. It specifically affects systems using AMD GPUs with the affected Linux kernel driver.

Mitigation Strategies

Apply the latest kernel updates from your Linux distribution to patch the AMD PM driver. If immediate patching is not possible, restrict write access to sysfs entries related to AMD powerplay or disable the affected driver module until patched.

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