Vulnerability in s390/pci Package: Fix for zpci_zdev_put() on Reserve

Kernel Updated 02 Oct 2025

Summary

14/11/2021

Disclosed on

N/A

Severity

No i

Fix available

Unrated

Severity

Not published

CVSS Score

GSD-2021-1002187: s390/pci: fix zpci_zdev_put() on reserve. Affects Kernel versions >= 2a671f77ee49f3e78997b77fdee139467ff6a598, < a46044a92add6a400f4dada7b943b30221f7cc80. No fix is published. How to fix ↓

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Background

The s390/pci package is a component of the Linux Kernel ecosystem. It provides support for the PCI bus on IBM System z architectures. This package enables communication between the mainframe and peripheral devices connected via the PCI bus. The vulnerability in question affects the zpci_zdev_put() function when used on reserve.

Vulnerability Detail

The vulnerability arises from a flaw in the zpci_zdev_put() function within the s390/pci package. When this function is used on reserve, it can lead to security issues. The impact and attack plausibility of this vulnerability have not been proven yet. However, it is crucial to address this vulnerability to prevent potential security breaches. The vulnerability was introduced in version v5.14 of the Linux Kernel and has been fixed in version v5.15 by commit a46044a92add6a400f4dada7b943b30221f7cc80.

How To Fix

No fixed version is published for this vulnerability.

To fix this vulnerability, it is recommended to update the Linux Kernel to version v5.15 or later. This can be done by pulling the latest changes from the official Linux Kernel repository: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/

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Conclusion

The vulnerability in the s390/pci package, specifically in the zpci_zdev_put() function when used on reserve, has been identified and fixed in version v5.15 of the Linux Kernel. It is crucial to update to this version or later to mitigate the potential security risks associated with this vulnerability. For further support on vulnerability remediation, please contact DevNack.com.

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