What is CVE-2025-71155?

CVE-2025-71155 is a high-severity vulnerability in Linux, classified under Out-of-bounds Write. CVSS score: 7.8/10. Published 2026-01-23.

How severe is CVE-2025-71155?

High severity. CVSS v3 base score is 7.8 out of 10.

Buffer overflow in Linux

CVE-2025-71155

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.

Vulnerability class: Buffer Overflow

EPSS: 0.001 (1.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

Linux — versions 919efcadb63fc3d3a82c3de7194140e0b28903dc, 6.18.4, 5deafa27d9ae040b75d392f60b12e300b42b4792
Linux Linux_kernel

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Patch)
416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Patch)

Frequently asked questions

What is CVE-2025-71155?: CVE-2025-71155 is a high-severity vulnerability in Linux, classified under Out-of-bounds Write. CVSS score: 7.8/10. Published 2026-01-23.
How severe is CVE-2025-71155?: High severity. CVSS v3 base score is 7.8 out of 10.