Bug 2432365 (CVE-2025-71155) - CVE-2025-71155 kernel: Linux kernel KVM: Memory corruption in s390 gmap_helper_zap_one_page()
Summary: CVE-2025-71155 kernel: Linux kernel KVM: Memory corruption in s390 gmap_helpe...
Keywords:
Status: NEW
Alias: CVE-2025-71155
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-01-23 15:02 UTC by OSIDB Bzimport
Modified: 2026-08-13 14:37 UTC (History)
2 users (show)

Fixed In Version:
Clone Of:
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Description OSIDB Bzimport 2026-01-23 15:02:43 UTC 
In the Linux kernel, the following vulnerability has been resolved:

KVM: s390: Fix gmap_helper_zap_one_page() again

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

Add the missing checks.
Comment 1 Keith Grant 2026-01-23 18:29:36 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026012306-CVE-2025-71155-7691@gregkh/T
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