Cloud Vulnerability DB
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Vulnerability DatabaseCVE-2024-58016
CVE-2024-58016:
Linux Debian vulnerability analysis and mitigation
Overview
CVE-2024-58016 is a vulnerability in the Linux kernel's safesetid security module, discovered and reported by syzbot. The vulnerability was disclosed on February 26, 2025, affecting the Linux kernel's security subsystem, specifically in the handling of policy writes in the safesetid module (NVD).
Technical details
The vulnerability exists in the handlepolicyupdate() function within the security/safesetid/securityfs.c file. The issue occurs when syzbot attempts to write a buffer with a large size to a sysfs entry, which is handled by handlepolicyupdate(). This can trigger a warning in kmalloc due to improper size validation before memory allocation (Kernel Commit).
Impact
The vulnerability could potentially lead to memory-related issues in the Linux kernel when processing safesetid policy updates. While the exact impact is not fully detailed in the available sources, it primarily affects the kernel's security subsystem handling of setid policies (Ubuntu Security).
Mitigation and workarounds
A patch has been developed and committed to the Linux kernel that adds a size check before allocating memory. The fix involves adding a validation check to ensure the buffer size does not exceed KMALLOCMAXSIZE, returning -EINVAL if the size is too large (Kernel Commit).
Additional resources
Source: This report was generated using AI
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