Privilege Escalation Vulnerability in microcode_ctl Package
Summary
ALSA-2026:65147: Important: microcode_ctl security, bug fix, and enhancement update. Affects microcode_ctl versions < 4:20260812-1.el8_10. Fixed in 4:20260812-1.el8_10. 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
Background
The microcode_ctl package provides essential microcode updates for Intel and AMD processors, ensuring optimal performance and security. It plays a critical role in maintaining the integrity of the CPU's operation by applying necessary updates that fix bugs and enhance functionality. However, vulnerabilities in this package can expose systems to significant security risks, particularly in environments relying on Intel Xeon processors.
Vulnerability Detail
The vulnerability stems from improper value handling in the hypervisor for Intel processors, leading to potential privilege escalation in Ring 0. Additionally, there is a specific issue with Intel Xeon 6 processors where improper memory range handling in System Management Mode (SMM) could also allow for privilege escalation. These vulnerabilities could allow an attacker to gain elevated privileges, potentially compromising the entire system.
How To Fix
Minimum fixed version
4:20260812-1.el8_10
This is the first release that contains the fix.
sudo dnf update microcode_ctlTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
Currently, no specific workarounds have been provided for this vulnerability. It is advisable to apply the patch as soon as it becomes available to mitigate risks.
Conclusion
The microcode_ctl package has a critical vulnerability that can lead to privilege escalation on affected systems. It is essential to update to the latest patched version to safeguard against potential exploits. Regular monitoring and timely updates are crucial for maintaining system security.
See every vulnerability recorded for microcode_ctl →
FAQ
The microcode_ctl package provides microcode updates for Intel and AMD processors, which are essential for fixing bugs and enhancing CPU performance.
The vulnerability could allow attackers to escalate their privileges, potentially compromising the entire system and gaining unauthorized access to sensitive data.
You can use Vulert's playground at Vulert Scanner to check if your application is affected by this vulnerability without needing to sign up.
Yes, a patch is available. You can update the microcode_ctl package to version 4:20260812-1.el8_10 to fix the vulnerability.
While no specific workarounds are provided, it is crucial to apply the patch as soon as possible to mitigate the risks associated with this vulnerability.
Related vulnerabilities
Recent vulnerabilities recorded for microcode_ctl.
