CVE-2025-71155: KVM: s390: Fix gmap_helper_zap_one_page() again

Published Jan 23, 2026
·
Updated

In the Linux kernel, the following vulnerability has been resolved:

KVM: s390: Fix gmaphelperzaponepage() again

A few checks were missing in gmaphelperzaponepage(), which can lead to memory corruption in the guest under specific circumstances.

Add the missing checks.

Affected Software

3 affected components
Linux Linux kernel
Linux Linux kernel>=6.17.4<6.18
Linux Linux kernel>=6.18<6.18.4

Event History

Jan 23, 2026
CVE Published
via MITRE·02:25 PM
Data Sourced
via MITRE·02:25 PM
DescriptionSeverity
Data Sourced
via NVD·03:16 PM
RemedyDescriptionSeverityWeaknessAffected Software

Frequently Asked Questions

1

What is the severity of CVE-2025-71155?

The severity of CVE-2025-71155 is high due to its potential to cause memory corruption in the guest.

2

How do I fix CVE-2025-71155?

To fix CVE-2025-71155, update to the latest version of the Linux kernel where the vulnerability is patched.

3

Who is affected by CVE-2025-71155?

CVE-2025-71155 affects systems running the Linux kernel with KVM support on s390 architecture.

4

What causes CVE-2025-71155?

CVE-2025-71155 is caused by missing checks in the gmap_helper_zap_one_page() function that can lead to memory corruption.

5

Is there any exploit code available for CVE-2025-71155?

As of now, there is no public exploit code available for CVE-2025-71155.

Contact

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