Vulnerability in tpm: fix reference counting for struct tpm_chip

Kernel Updated 02 Oct 2025

Summary

24/04/2022

Disclosed on

N/A

Severity

No i

Fix available

Unrated

Severity

Not published

CVSS Score

GSD-2022-1002456: tpm: fix reference counting for struct tpm_chip. Affects Kernel versions >= fdc915f7f71939ad5a3dda3389b8d2d7a7c5ee66, < 473a66f99cb8173c14138c5a5c69bfad04e8f9ac. No fix is published. How to fix ↓

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Background

The tpm package is a component of the Linux Kernel that provides support for Trusted Platform Modules (TPMs). TPMs are hardware devices that provide cryptographic functions and secure storage for sensitive data. The tpm_chip structure is used to represent a TPM chip in the kernel. This vulnerability in the tpm package affects versions 4.12 to 4.14.275 of the Linux Kernel.

Vulnerability Detail

The vulnerability in the tpm package is related to a reference counting issue in the struct tpm_chip. This issue can lead to memory leaks and potential use-after-free vulnerabilities. An attacker could potentially exploit this vulnerability to execute arbitrary code or escalate privileges. The vulnerability was introduced in version 4.12 of the Linux Kernel and has been fixed in version 4.14.276.

How To Fix

No fixed version is published for this vulnerability.

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Workaround

There is no specific workaround available for this vulnerability. Updating the Linux Kernel to the fixed version is the recommended solution.

Conclusion

In conclusion, the tpm package in the Linux Kernel is vulnerable to a reference counting issue in the struct tpm_chip. This vulnerability can lead to memory leaks and potential use-after-free vulnerabilities. It is important to update the Linux Kernel to version 4.14.276 or later to mitigate this vulnerability. For further support on vulnerability remediation, please contact DevNack.com.

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