Critical Vulnerability in Linux Kernel: ELF Header Read Overflow
Summary
CVE-2025-39787: In the Linux kernel, the following vulnerability has been resolved: soc: qcom: mdt_loader: Ensure we don't read past the ELF header When the MDT loader is used in remoteproc, the ELF header is sanitized beforehand, but t... Affects linux versions 5.10.103-1 – 6.9.9-1. No fix is published. How to fix ↓
Check if this vulnerability affects your application
Upload a manifest or SBOM and we'll show whether you're affected, plus every other risky package in the same scan.
No signup required · Results in about 60 seconds
Habilume
Habit tracker with a companion that grows with you
Complete habits, earn Lume Points, and watch your Lume grow as you stay consistent.
Background
The Linux kernel is a core component of the Debian operating system, responsible for managing hardware resources and providing essential services to applications. It is widely used across various devices, from servers to embedded systems. This vulnerability affects the kernel's handling of ELF (Executable and Linkable Format) headers, specifically in the context of the MDT loader used in remoteproc and other clients, which could lead to unauthorized memory access.
Vulnerability Detail
In the Linux kernel, a vulnerability has been identified in the MDT loader related to ELF header processing. The issue arises when the firmware buffer size is not validated properly, allowing the possibility of reading past the end of the buffer during header traversal. This can lead to potential memory corruption or unauthorized access to sensitive data. The vulnerability has been cataloged as CVE-2025-39787 and affects multiple Debian versions.
How To Fix
No fixed version is published for this vulnerability.
Tip — Not sure whether your app is affected? Vulert can check the versions your app actually runs. Scan free →
Workaround
As a temporary workaround, ensure that the firmware buffer size is validated before use. This can be done by implementing checks in the code that processes ELF headers to prevent reading beyond the allocated buffer size.
Conclusion
The CVE-2025-39787 vulnerability in the Linux kernel poses a significant risk due to improper handling of ELF headers. It is crucial to update your system to the latest patched version to mitigate this risk. Additionally, utilizing tools like Vulert can help monitor your applications for vulnerabilities effectively.
See every vulnerability recorded for linux →
FAQ
CVE-2025-39787 is a vulnerability in the Linux kernel that allows reading past the ELF header, potentially leading to memory corruption.
Debian versions 11, 12, 13, and 14 are affected by this vulnerability.
You can use Vulert to monitor and alert for open-source vulnerabilities in your software. Visit Vulert Scanner to check if your application is affected without needing to sign up.
If immediate updates are not possible, ensure that you validate firmware buffer sizes in your applications to mitigate the risk temporarily.
More information can be found in the official CVE database or by visiting the source link provided in the vulnerability details.
Related vulnerabilities
Recent vulnerabilities recorded for linux.
Habilume
Habit tracker with a companion that grows with you
Complete habits, earn Lume Points, and watch your Lume grow as you stay consistent.
