Privilege Escalation Vulnerability in Intel Microcode Packages
Summary
CVE-2025-22889: Improper handling of overlap between protected memory ranges for some Intel(R) Xeon(R) 6 processor with Intel(R) TDX may allow a privileged user to potentially enable escalation of privilege via local access. Affects intel-ucode versions < 20250812-r0. Fixed in 20250812-r0. How to fix ↓
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Background
Intel Microcode is a crucial component of Intel processors, responsible for managing the processor's operations and ensuring optimal performance. It provides updates to the processor's firmware, addressing bugs and enhancing functionality. The vulnerability in question affects multiple versions of Intel Microcode across Debian distributions, potentially exposing systems to privilege escalation risks.
Vulnerability Detail
CVE-2025-22889 is a vulnerability that arises from improper handling of memory range overlaps in certain Intel Xeon 6 processors equipped with Intel TDX technology. This flaw may allow a privileged user to escalate their privileges through local access, potentially compromising system integrity and security. The vulnerability is significant as it can lead to unauthorized access and manipulation of sensitive data.
How To Fix
Minimum fixed version
20250812-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
As of now, no specific workarounds have been provided for this vulnerability. It is recommended to monitor for updates from Intel and Debian regarding any mitigations or temporary solutions until a patch is available.
Conclusion
CVE-2025-22889 presents a serious risk to systems utilizing Intel Microcode across various Debian distributions. Users are urged to update their packages promptly to mitigate potential threats. Regular monitoring for updates and utilizing tools like Vulert can help maintain security against such vulnerabilities.
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FAQ
CVE-2025-22889 is a vulnerability in Intel Microcode that allows for potential privilege escalation due to improper memory management.
The vulnerability affects Intel Microcode packages across Debian 11, 12, 13, and 14 distributions.
You can use the Vulert 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 available, it is advisable to monitor for updates and apply them as soon as they are released.
For more information, you can visit the official Intel security advisories or the Debian security pages.
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