Out-of-Bounds Write Vulnerability in Linux Kernel - CVE-2025-37923
Summary
CVE-2025-37923: In the Linux kernel, the following vulnerability has been resolved: tracing: Fix oob write in trace_seq_to_buffer() syzbot reported this bug: ================================================================== BUG: KASAN:... 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 and software interaction. It is known for its stability, performance, and security features. However, like any complex software, it can have vulnerabilities. CVE-2025-37923 is a specific issue that affects the kernel's tracing functionality, which is used for debugging and performance monitoring.
Vulnerability Detail
CVE-2025-37923 is an out-of-bounds write vulnerability found in the trace_seq_to_buffer function of the Linux kernel. This vulnerability allows an attacker to write more data than the allocated buffer size, potentially leading to memory corruption, system crashes, or arbitrary code execution. The issue was reported by syzbot, indicating that the function attempts to copy data exceeding the PAGE_SIZE limit, which can compromise system integrity.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
As a temporary workaround, users can limit the amount of data processed by the tracing functionality or disable tracing features until the kernel is updated. This may involve modifying system configurations or using specific kernel parameters to mitigate the risk.
Conclusion
CVE-2025-37923 represents a significant vulnerability in the Linux kernel's tracing functionality, which can lead to severe consequences if not addressed. Users are urged to update their systems promptly and consider using tools like Vulert to monitor for vulnerabilities in real-time.
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FAQ
CVE-2025-37923 is a vulnerability in the Linux kernel that allows for out-of-bounds writes in the tracing functionality, potentially leading to memory corruption.
You can use the Vulert platform to monitor and alert for open-source vulnerabilities in your software. Visit Vulert Scanner to check if your application is affected by this vulnerability.
The vulnerability can lead to system crashes, memory corruption, or even arbitrary code execution, compromising the security and stability of the system.
Yes, a patch is available in the updated versions of the Linux kernel. Users should update their kernel to the latest version to mitigate this vulnerability.
If an immediate update is not possible, consider disabling tracing features or limiting data processed by the tracing functionality as a temporary workaround.
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