Vulnerability in Xen Xenbus Package: Removal of Grants in Error Case

Kernel Updated 02 Oct 2025

Summary

18/03/2022

Disclosed on

N/A

Severity

No i

Fix available

Unrated

Severity

Not published

CVSS Score

GSD-2022-1000824: xen/xenbus: don't let xenbus_grant_ring() remove grants in error case. Affects Kernel versions < 5c600371b8fd02cbbb0eb83a9f664e3f0b75c28e. No fix is published. How to fix ↓

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Background

The Xen Xenbus package is a component of the Linux Kernel ecosystem. It provides a mechanism for communication between the Xen hypervisor and guest operating systems. The package includes the xenbus_grant_ring() function, which is responsible for granting access to shared memory rings between the hypervisor and guests. This vulnerability affects versions of the Linux Kernel prior to v5.10.105.

Vulnerability Detail

The vulnerability in the Xen Xenbus package allows an attacker to remove grants in an error case. When the xenbus_grant_ring() function encounters an error, it incorrectly removes grants, which can lead to a variety of security issues. The impact and attack plausibility of this vulnerability have not been proven yet. However, if successfully exploited, an attacker could potentially gain unauthorized access to shared memory rings and compromise the security and integrity of the system.

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

In conclusion, the Xen Xenbus package in the Linux Kernel is vulnerable to a flaw that allows removal of grants in an error case. It is recommended to update the Linux Kernel to version v5.10.105 or later to mitigate this vulnerability. For further support on vulnerability remediation, please contact DevNack.com.

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