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Linux Kernel KVM: s390 Memory Corruption Vulnerability in gmap_helper_zap_one_page

Vulnerability

A vulnerability in the Linux kernel's KVM for s390 architecture has been addressed. The issue arose in the gmap_helper_zap_one_page() function, where certain checks were missing. This oversight could lead to memory corruption in the guest under specific conditions. The vulnerability has been fixed by adding the necessary checks.

Impact

The vulnerability could cause memory corruption in the guest virtual machine.

Added: Jan 23, 2026, 4:00 PM
Updated: Jan 23, 2026, 4:00 PM

Vulnerability Rating

Custom Algorithm
spread
9.0
impact
2.5
exploitability
3.5
remediation
7.7
relevance
2.3
threat
3.2
urgency
2.9
incentive
0.0

Our algorithm analyzes dozens of metrics to generate these 8 key vulnerability categories, which are then combined to calculate the overall risk score.