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Vulnerability DatabaseCVE-2023-52985
CVE-2023-52985:
Linux Kernel vulnerability analysis and mitigation
Overview
A vulnerability in the Linux kernel (CVE-2023-52985) was identified affecting the arm64 device tree specification for imx8mm-verdin systems. The issue relates to the ethernet PHY power management functionality during system suspend states (NVD, Debian Tracker).
Technical details
The vulnerability occurs when the system enters either freeze or memory suspend states, where the FEC (Fast Ethernet Controller) driver attempts to power down the PHY, resulting in a kernel crash and system unresponsiveness. The issue manifests with a specific call trace involving phyerror, kszphyhandle_interrupt, and other related functions (NVD).
Impact
When triggered, the vulnerability causes a kernel crash and renders the system non-responsive, effectively creating a denial of service condition (NVD).
Mitigation and workarounds
The issue has been resolved by disabling the feature of powering down the ethernet PHY, as there is currently no functionality in the PHY subsystem to properly handle PHY power down operations (Debian Tracker).
Additional resources
Source: This report was generated using AI
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