Amazon Linux 2 Security Advisory: ALAS2-2026-3294
Advisory Released Date: 2026-05-14
Advisory Updated Date: 2026-05-14
Improper handling of values in the microcode flow for some Intel(R) Processor Family may allow an escalation of privilege. Startup code and smm adversary with a privileged user combined with a high complexity attack may enable escalation of privilege. This result may potentially occur via local access when attack requirements are present with special internal knowledge and requires no user interaction. The potential vulnerability may impact the confidentiality (low), integrity (low) and availability (none) of the vulnerable system, resulting in subsequent system confidentiality (low), integrity (low) and availability (none) impacts. (CVE-2025-31648)
Affected Packages:
microcode_ctl
Note:
This advisory is applicable to Amazon Linux 2 (AL2) Core repository. Visit this FAQ section for the difference between AL2 Core and AL2 Extras advisories.
Issue Correction:
Run yum update microcode_ctl or yum update --advisory ALAS2-2026-3294 to update your system.
System reboot is required in order to complete this update.
i686:
microcode_ctl-2.1-47.amzn2.4.27.i686
microcode_ctl-debuginfo-2.1-47.amzn2.4.27.i686
src:
microcode_ctl-2.1-47.amzn2.4.27.src
x86_64:
microcode_ctl-2.1-47.amzn2.4.27.x86_64
microcode_ctl-debuginfo-2.1-47.amzn2.4.27.x86_64