CVE-2023-54092
Unknown Unknown - Not Provided
Index Handling Flaw in Linux KVM s390 Causes VM Crashes

Publication date: 2025-12-24

Last updated on: 2025-12-24

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: KVM: s390: pv: fix index value of replaced ASCE The index field of the struct page corresponding to a guest ASCE should be 0. When replacing the ASCE in s390_replace_asce(), the index of the new ASCE should also be set to 0. Having the wrong index might lead to the wrong addresses being passed around when notifying pte invalidations, and eventually to validity intercepts (VM crash) if the prefix gets unmapped and the notifier gets called with the wrong address.
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Meta Information
Published
2025-12-24
Last Modified
2025-12-24
Generated
2026-06-16
AI Q&A
2025-12-24
EPSS Evaluated
2026-06-15
NVD
CVE-2023-54092
EUVD
EUVD-2023-60353
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
linux linux_kernel *
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Exploitability
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KEV
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CWE ID Description
CWE-UNKNOWN
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Executive Summary

This vulnerability involves the Linux kernel's KVM on s390 architecture where the index field of the struct page corresponding to a guest ASCE (Address Space Control Element) was not properly set to 0 when replaced. This incorrect index can cause wrong addresses to be used during page table entry invalidations, potentially leading to validity intercepts and a virtual machine crash if the prefix is unmapped and the notifier is called with the wrong address.

Impact Analysis

The vulnerability can cause virtual machines running on the affected Linux kernel with KVM on s390 architecture to crash due to invalid address handling during ASCE replacement. This can lead to system instability and potential downtime for services running inside the virtual machines.

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