Privilege Escalation Vulnerability in Intel Microcode Package
Summary
ALPINE-CVE-2025-22840: Sequence of processor instructions leads to unexpected behavior for some Intel(R) Xeon(R) 6 Scalable processors may allow an authenticated 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
The intel-ucode package is essential for providing microcode updates to Intel processors, enhancing their performance and security. It ensures that the processors operate optimally by applying necessary updates that fix bugs and vulnerabilities. However, certain versions of this package are susceptible to a vulnerability that could allow an authenticated user to escalate privileges.
Vulnerability Detail
The vulnerability identified as ALPINE-CVE-2025-22840 arises from a sequence of processor instructions that can lead to unexpected behavior in some Intel(R) Xeon(R) 6 Scalable processors. This flaw may allow an authenticated user to potentially escalate their privileges through local access, posing a significant security risk. The issue is particularly concerning as it can be exploited without requiring remote access, making it easier for malicious actors with local access to exploit the vulnerability.
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 a temporary measure, if updating the package is not immediately feasible, consider restricting local access to the affected systems to minimize the risk of exploitation. Implementing strict user permissions and monitoring can also help mitigate potential threats.
Conclusion
The ALPINE-CVE-2025-22840 vulnerability in the intel-ucode package poses a significant risk of privilege escalation for systems using certain Intel processors. It is essential to update to the patched version to mitigate this risk. Users should also consider implementing temporary workarounds to protect their systems until they can apply the necessary updates.
See every vulnerability recorded for intel-ucode →
FAQ
The vulnerability allows an authenticated user to escalate privileges on systems using specific Intel processors.
The vulnerability affects intel-ucode versions in Alpine Linux v3.19, v3.20, v3.21, and v3.22.
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If an immediate update is not possible, restrict local access to the affected systems and enforce strict user permissions as a temporary workaround.
No, the vulnerability requires local access to exploit, which limits the risk compared to remote vulnerabilities.
References
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