Constant-Time Key Printing Vulnerability in dm crypt

Kernel Updated 02 Oct 2025

Summary

28/06/2022

Disclosed on

N/A

Severity

No i

Fix available

Unrated

Severity

Not published

CVSS Score

GSD-2022-1004006: dm crypt: make printing of the key constant-time. Affects Kernel versions < 4cd9c5f4235d0132e89bcc4cf03843494531e99b. No fix is published. How to fix ↓

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Background

The dm crypt package is a component of the Linux Kernel that provides disk encryption functionality. It is responsible for encrypting and decrypting data on block devices. The package uses a key to perform these operations securely. However, a vulnerability has been discovered in the way the key is printed, which could potentially leak sensitive information.

Vulnerability Detail

The vulnerability in dm crypt involves the printing of the encryption key in a non-constant-time manner. This means that an attacker with sufficient access to the system could potentially infer information about the key by analyzing the timing of the printing operation. This could lead to the compromise of encrypted data and the exposure of sensitive information. The vulnerability has been fixed in the Linux Kernel version v4.14.282.

How To Fix

No fixed version is published for this vulnerability.

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Workaround

There is no specific workaround mentioned for this vulnerability.

Conclusion

The constant-time key printing vulnerability in dm crypt can potentially lead to the compromise of encrypted data. It is crucial to update the Linux Kernel to version v4.14.282 or later to mitigate this vulnerability. For further support on vulnerability remediation, contact DevNack.com.

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