Heap Overwrite Vulnerability in Linux Kernel - CVE-2025-38090
Summary
CVE-2025-38090: In the Linux kernel, the following vulnerability has been resolved: drivers/rapidio/rio_cm.c: prevent possible heap overwrite In riocm_cdev_ioctl(RIO_CM_CHAN_SEND) -> cm_chan_msg_send() -> riocm_ch_send() cm_chan_msg_sen... Affects linux versions 5.10.103-1 – 6.9.9-1. No fix is published. How to fix ↓
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Background
The Linux kernel is the core component of many operating systems, providing essential services for hardware management and system operations. It is widely used across various platforms, including servers, desktops, and embedded systems. The kernel's stability and security are paramount, as vulnerabilities can lead to severe system compromises. This specific vulnerability affects the Rio Communication Manager (RIO CM) within the kernel, which is responsible for managing communication over RapidIO networks.
Vulnerability Detail
CVE-2025-38090 is a vulnerability found in the Linux kernel's RIO CM driver, specifically in the riocm_cdev_ioctl function. The flaw arises from insufficient validation of the data size sent from userspace, allowing for a potential heap overwrite. When the cm_chan_msg_send function checks for excessive data, it fails to ensure that enough data is provided for the rio_ch_chan_hdr structure. Consequently, this oversight can lead to unauthorized memory writes, potentially compromising system integrity and stability.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
Currently, there are no specific workarounds mentioned for this vulnerability. It is recommended to apply the patch as soon as it becomes available to mitigate risks.
Conclusion
CVE-2025-38090 represents a significant vulnerability in the Linux kernel that could lead to heap overwrites and system instability. Users are urged to update their systems promptly to the patched versions of the Linux kernel to protect against potential exploits. Utilizing tools like Vulert can help monitor for vulnerabilities in real-time.
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FAQ
CVE-2025-38090 is a vulnerability in the Linux kernel's RIO CM driver that can lead to a heap overwrite due to insufficient data validation.
This vulnerability can potentially allow an attacker to write to unauthorized memory locations, leading to system instability or compromise.
If you are using Debian versions 11, 12, or 13 with the Linux kernel, your system may be affected. Check for updates to ensure you have the patched version.
You can use Vulert, which monitors and alerts for open-source vulnerabilities in your software. Visit Vulert Scanner to check if your application is affected without needing to sign up.
While there are no specific workarounds available, it is crucial to prioritize updating your kernel to mitigate the risks associated with this vulnerability.
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