Linux Kernel up to 5.10.189/5.15.123/6.1.42/6.4.7 KVM s390_replace_asce denial of service

Summaryinfo

A vulnerability was found in Linux Kernel up to 5.10.189/5.15.123/6.1.42/6.4.7. It has been classified as critical. This vulnerability affects the function s390_replace_asce of the component KVM. This manipulation causes denial of service. This vulnerability is tracked as CVE-2023-54092. No exploit exists. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability classified as critical was found in Linux Kernel up to 5.10.189/5.15.123/6.1.42/6.4.7. Affected by this vulnerability is the function s390_replace_asce of the component KVM. The manipulation with an unknown input leads to a denial of service vulnerability. The CWE definition for the vulnerability is CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. As an impact it is known to affect availability. The summary by CVE is:

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.

The advisory is shared at git.kernel.org. This vulnerability is known as CVE-2023-54092 since 12/24/2025. Technical details are known, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 279855 (Linux Distros Unpatched Vulnerability : CVE-2023-54092), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 5.10.190, 5.15.124, 6.1.43 or 6.4.8 eliminates this vulnerability. Applying the patch 8e635da0e0d3cb45e32fa79b36218fb98281bc10/49a2686adddebe1ae76b4d368383208656ef6606/017f686bcb536ff23d49c143fdf9d1fd89a9a924/f1c7a776338f2ac5e34da40e58fe9f33ea390a5e/c2fceb59bbda16468bda82b002383bff59de89ab is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the databases at Tenable (279855) and CERT Bund (WID-SEC-2025-2929). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Affected

• Open Source Linux Kernel

Productinfo

Type

• Operating System

Vendor

• Linux

Name

• Kernel

Version

• 5.10.189
• 5.15.123
• 6.1.0
• 6.1.1
• 6.1.2
• 6.1.3
• 6.1.4
• 6.1.5
• 6.1.6
• 6.1.7
• 6.1.8
• 6.1.9
• 6.1.10
• 6.1.11
• 6.1.12
• 6.1.13
• 6.1.14
• 6.1.15
• 6.1.16
• 6.1.17
• 6.1.18
• 6.1.19
• 6.1.20
• 6.1.21
• 6.1.22
• 6.1.23
• 6.1.24
• 6.1.25
• 6.1.26
• 6.1.27
• 6.1.28
• 6.1.29
• 6.1.30
• 6.1.31
• 6.1.32
• 6.1.33
• 6.1.34
• 6.1.35
• 6.1.36
• 6.1.37
• 6.1.38
• 6.1.39
• 6.1.40
• 6.1.41
• 6.1.42
• 6.4.0
• 6.4.1
• 6.4.2
• 6.4.3
• 6.4.4
• 6.4.5
• 6.4.6
• 6.4.7

License

• open-source

Website

• Vendor: https://www.kernel.org/

CPE 2.3info

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Entryinfo

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