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Vulnerability DatabaseCVE-2023-53308
CVE-2023-53308:
Linux Kernel vulnerability analysis and mitigation
Overview
CVE-2023-53308 was disclosed on September 16, 2025, affecting the Linux kernel. The vulnerability is related to improper handling of pmruntimeget() failure in the net/fec driver's remove callback (NVD, Ubuntu).
Technical details
The vulnerability occurs when pmruntimeget() (disguised as pmruntimeresumeandget()) fails, causing the remove callback to return an error early. The driver core ignores this error value and continues removing the device, leading to a resource leak. Additionally, when devm allocated resources are freed, if a driver callback is called later, the register mapping is already gone, potentially resulting in a system crash (NVD).
Impact
The vulnerability can result in resource leaks and potential system crashes when the affected driver's callback is invoked after resource deallocation (NVD).
Mitigation and workarounds
Multiple Linux distributions have released fixes for this vulnerability. Ubuntu has patched various kernel versions including 5.15.0-83.92 for 22.04 LTS, 5.4.0-162.179 for 20.04 LTS, and 5.4.0-162.179~18.04.1 for 18.04 LTS with Ubuntu Pro (Ubuntu).
Additional resources
Source: This report was generated using AI
Related Linux Kernel vulnerabilities:
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