Review reviewHigh

CVE-2025-71155

Linux Linux, linux kernel

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.

CVSS
7.8
EPSS
0.11%
1.60% percentile
CISA KEV
Not listed
Published
2026.01.24
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability0.11%
Technical severityCVSS 7.8

Vulnerability overview

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.

Affected product and versions

Product
Linux Linux, linux kernel
Affected versions
>= 5deafa27d9ae040b75d392f60b12e300b42b4792 < 2af2abbcbf8573100288e8f8aea2dab8a2a0ceb7, >= 5deafa27d9ae040b75d392f60b12e300b42b4792 < 2f393c228cc519ddf19b8c6c05bf15723241aa96, >= 919efcadb63fc3d3a82c3de7194140e0b28903dc, >= 6.17.4 < 6.18, >= 6.18, >= 6.18 < 6.18.4
Fixed versions
6.18, 6.18.4

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Linux Linux, linux kernel and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE
CWE-787
CVE-2025-71155 — Linux Linux, linux kernel | SECUFOCUS NOW