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Vulnerability DatabaseCVE-2023-53470
CVE-2023-53470:
Linux Kernel vulnerability analysis and mitigation
Overview
CVE-2023-53470 is a vulnerability discovered in the Linux kernel's ionic driver, specifically related to the handling of devlink allocation. The issue was disclosed on October 1, 2025, and affects the kernel's device management functionality (NVD).
Technical details
The vulnerability occurs when devlinkalloc() fails and the driver attempts to use devlinkpriv() on the NULL return value, which causes a kernel panic. The root cause is a missing NULL check after the allocation attempt. While the driver load will still fail with the fix implemented, it prevents the system from entering a panic state (NVD).
Impact
When exploited, this vulnerability can cause a kernel panic, leading to system instability and potential denial of service. The issue primarily affects system availability by causing the kernel to crash when the ionic driver encounters specific conditions (NVD).
Mitigation and workarounds
A fix has been implemented that adds a check for NULL on the alloc return value. Ubuntu has released patches for various kernel versions, including linux-hwe-5.15 (5.15.0-83.92~20.04.1) for 20.04 LTS focal (Ubuntu).
Additional resources
Source: This report was generated using AI
Related Linux Kernel vulnerabilities:
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