Denial of Service Vulnerability in Intel Microcode Packages
Summary
CVE-2025-20103: Insufficient resource pool in the core management mechanism for some Intel(R) Processors may allow an authenticated user to potentially enable denial of service via local access. Affects intel-ucode versions < 20250512-r0. Fixed in 20250512-r0. How to fix ↓
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Background
Intel microcode is a critical component that updates the processor's internal instructions to enhance performance and security. It is essential for maintaining the stability and efficiency of Intel processors across various Debian versions, including Debian 11, 12, and 13. This vulnerability affects the core management mechanism of Intel processors, potentially allowing unauthorized access to system resources.
Vulnerability Detail
The vulnerability identified as CVE-2025-20103 arises from an insufficient resource pool in the core management mechanism of certain Intel processors. This flaw can be exploited by an authenticated user with local access, leading to a potential denial of service. The implications of this vulnerability are significant, as it could disrupt system operations and degrade performance, impacting users and applications relying on the affected processors.
How To Fix
Minimum fixed version
20250512-r0
This is the first release that contains the fix.
sudo apk add --upgrade intel-ucodeTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
Currently, there are no specific workarounds available for this vulnerability. It is recommended to monitor for updates and apply the patch as soon as it becomes available.
Conclusion
CVE-2025-20103 presents a significant risk to systems using Intel microcode on Debian platforms. It is essential for users to stay informed about updates and apply patches promptly to mitigate the risk of denial of service. Utilizing tools like Vulert can help monitor for vulnerabilities in real-time.
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FAQ
CVE-2025-20103 is a vulnerability in Intel microcode that allows an authenticated user to potentially enable denial of service via local access.
The vulnerability affects Intel microcode packages on Debian versions 11, 12, and 13.
You can use Vulert's playground at Vulert Scanner to check if your application is affected by this vulnerability without needing to sign up.
While there are no specific workarounds, it is advisable to monitor your system for any unusual behavior and apply the update as soon as it is available.
More information can be found in the official CVE database or through security advisories related to Intel microcode.
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