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Vulnerability DatabaseCVE-2025-38090
CVE-2025-38090:
Linux Debian vulnerability analysis and mitigation
Overview
A heap overflow vulnerability was discovered in the Linux kernel's RapidIO communication manager (drivers/rapidio/rio_cm.c). The vulnerability was disclosed on June 30, 2025, and affects the Linux kernel's RapidIO subsystem (NVD).
Technical details
The vulnerability exists in the riocmcdevioctl(RIOCMCHANSEND) function chain, specifically in the cmchanmsgsend() and riocmchsend() functions. While cmchanmsgsend() implements checks to prevent excessive data from userspace, riocmchsend() failed to verify if sufficient data was provided. This oversight allows writing to fields in the riochchanhdr beyond the allocated space (NVD, Debian Tracker).
Impact
The vulnerability could lead to a heap overflow condition, potentially allowing an attacker to write beyond the bounds of allocated memory space. This could result in memory corruption and potentially lead to privilege escalation or system crashes (NVD).
Mitigation and workarounds
The issue has been addressed by implementing additional checks in riocmchsend() to verify that the entire riochchan_hdr was properly copied from userspace. Multiple Linux distributions have released or are preparing updates to address this vulnerability (Debian Tracker).
Additional resources
Source: This report was generated using AI
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