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Vulnerability DatabaseCVE-2025-39809
CVE-2025-39809:
Linux Kernel vulnerability analysis and mitigation
Overview
CVE-2025-39809 is a vulnerability discovered in the Linux kernel, specifically affecting the Intel QuickI2C ACPI implementation. The vulnerability was disclosed on September 16, 2025, and involves a stack-out-of-bounds issue in the ACPI DSD methods for ICRS and ISUB data handling (NVD).
Technical details
The vulnerability occurs when the QuickI2C ACPI DSD methods return ICRS and ISUB data with a trailing byte, making the actual length one byte longer than the defined structures. This mismatch causes a stack-out-of-bounds condition and can result in a kernel crash. The issue specifically manifests in the quicki2cacpigetdsd_property function (NVD).
Impact
When exploited, this vulnerability leads to a kernel crash, affecting system stability and availability. The bug triggers a KASAN (Kernel Address Sanitizer) stack-out-of-bounds detection, causing the system to halt (NVD).
Mitigation and workarounds
The vulnerability has been resolved by adding reserved padding to quicki2csubipacpi_parameter/config structures to accommodate the extra byte in the ICRS and ISUB data returns (NVD).
Additional resources
Source: This report was generated using AI
Related Linux Kernel vulnerabilities:
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