Vulnerability in Kernel package: efi/x86: use naked RET on mixed mode call wrapper

Kernel Updated 02 Oct 2025

Summary

31/07/2022

Disclosed on

N/A

Severity

No i

Fix available

Unrated

Severity

Not published

CVSS Score

GSD-2022-1004370: efi/x86: use naked RET on mixed mode call wrapper. Affects Kernel versions >= 1d61a2988612ac0632134454d5407c63ae0b9d42, < 554cf28b104d6f4a215304bbaae4bf7713b0ea0d. No fix is published. How to fix ↓

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Background

The Kernel package is a crucial component of the Linux operating system. It provides the core functionality and acts as an interface between the hardware and software layers. The efi/x86 module within the Kernel package specifically handles the execution of EFI (Extensible Firmware Interface) code on x86 systems. This vulnerability affects the efi/x86 module and can potentially be exploited by attackers.

Vulnerability Detail

The vulnerability in the efi/x86 module involves the improper use of a mixed mode call wrapper. Specifically, the module does not use a naked RET (return) instruction, which can lead to security issues. While the exact impact and plausibility of an attack are yet to be proven, this vulnerability has the potential to be exploited by malicious actors. It is important to note that this vulnerability has been fixed in Linux Kernel version v5.15.57 by commit 554cf28b104d6f4a215304bbaae4bf7713b0ea0d. The vulnerability was introduced in version v5.15.57 by commit 1d61a2988612ac0632134454d5407c63ae0b9d42.

How To Fix

No fixed version is published for this vulnerability.

To fix this vulnerability, it is recommended to update the Kernel package to version v5.15.57 or later. This can be done by pulling the latest updates from the official Linux Kernel repository. Once the updated version is installed, the vulnerability will be patched.

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Workaround

There is no specific workaround mentioned for this vulnerability.

Conclusion

The vulnerability in the efi/x86 module of the Kernel package can potentially be exploited by attackers. It is crucial to update the Kernel package to version v5.15.57 or later to mitigate this vulnerability. For further support on vulnerability remediation, please contact DevNack.com.

See every vulnerability recorded for Kernel →