EFIv2 Runtime Services Vulnerability in Linux Kernel

Kernel Updated 02 Oct 2025

Summary

18/02/2022

Disclosed on

N/A

Severity

No i

Fix available

Unrated

Severity

Not published

CVSS Score

GSD-2022-1000243: efi: runtime: avoid EFIv2 runtime services on Apple x86 machines. Affects Kernel versions < 3df52448978802ae15dcebf66beba1029df957b4. No fix is published. How to fix ↓

Free scan

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.

Check my app free

No signup required · Results in about 60 seconds

Upload your dependency manifest or SBOM

Drag & drop your file here or Browse

Java Javascript PHP Python Go Rust Ruby Dart C/C++ Elixir CycloneDX SPDX

Upload a supported dependency manifest or SBOM. No installation or source-code access required.

See supported files and SBOM formats

SBOM sbom.json · bom.json · bom.xml · *.spdx.json · *.cdx.json · *.cdx.xml

Java pom.xml · gradle.lockfile · buildscript-gradle.lockfile

Javascript package-lock.json · yarn.lock · pnpm-lock.yaml

PHP composer.lock

Python poetry.lock · requirements.txt · Pipfile.lock

Go go.mod

Rust Cargo.lock

Ruby Gemfile.lock

Dart pubspec.lock

C/C++ conan.lock

Elixir mix.lock

Enter your work email to receive your report link.

Verify your email to view the full report and start 30 days of continuous monitoring. No credit card required.

Background

The Linux Kernel is a widely used open-source software that serves as the core of the Linux operating system. It provides essential functionality and interfaces for various hardware devices and software components. The EFI (Extensible Firmware Interface) is a specification that defines an interface between the operating system and the platform firmware. EFIv2 runtime services are a set of services provided by the EFI firmware during runtime. Apple x86 machines, which run on Intel processors, utilize EFI firmware. However, a vulnerability has been discovered in the Linux Kernel that affects the usage of EFIv2 runtime services on Apple x86 machines.

Vulnerability Detail

The vulnerability in the Linux Kernel allows attackers to exploit EFIv2 runtime services on Apple x86 machines. The exact impact and attack plausibility of this vulnerability have not been proven yet. However, if successfully exploited, it could lead to unauthorized access, privilege escalation, or other security breaches. The vulnerability has been addressed in the Linux Kernel version v5.15.19 through commit 3df52448978802ae15dcebf66beba1029df957b4.

How To Fix

No fixed version is published for this vulnerability.

Tip — Not sure whether your app is affected? Vulert can check the versions your app actually runs. Scan free →

Workaround

There is no specific workaround mentioned for this vulnerability.

Conclusion

The EFIv2 runtime services vulnerability in the Linux Kernel affects Apple x86 machines running on EFI firmware. It is recommended to update the Linux Kernel to version v5.15.19 or later to mitigate this vulnerability. For further support on vulnerability remediation, please contact DevNack.com.

See every vulnerability recorded for Kernel →