Cloud Vulnerability DB
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Vulnerability DatabaseCVE-2022-50404
CVE-2022-50404:
Linux Kernel vulnerability analysis and mitigation
Overview
CVE-2022-50404 is a vulnerability in the Linux kernel related to a memory leak in the fbcondosetfont() function. The issue was discovered when syzbot reported that commit a5a923038d70 ("fbdev: fbcon: Properly revert changes when vcresize() failed") failed to account for a buffer that might be newly allocated by fbconsetfont() (NVD).
Technical details
The vulnerability stems from a memory leak in the fbcondosetfont() function within the Linux kernel's framebuffer console (fbcon) subsystem. The issue occurs because the code fails to properly release a buffer that might be newly allocated by fbconsetfont() when the vcresize() operation fails (Ubuntu).
Impact
The vulnerability results in a memory leak in the Linux kernel's framebuffer console subsystem, which could potentially lead to system resource exhaustion over time (NVD).
Mitigation and workarounds
The vulnerability has been fixed in various Linux distributions. Ubuntu has released patches for multiple kernel versions, including linux-hwe-5.15 (5.15.0-69.76~20.04.1), linux-azure (5.15.0-1035.42), and linux-kvm (5.15.0-1030.35) (Ubuntu).
Additional resources
Source: This report was generated using AI
Related Linux Kernel vulnerabilities:
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