7.8

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

Modified
AliasesUBUNTU-CVE-2025-71155DEBIAN-CVE-2025-71155
Published 23-01-2026Last modified 05-08-2026

Vulnerability summary

CVE-2025-71155 is a high (CVSS 7.8) Out-of-bounds Write vulnerability in linux. EPSS estimates a 0.13% chance of exploitation in the next 30 days, higher than 2.9% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 7.8, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
7.8/10
010
High · v3.1 (CVE.org)
EPSS score
0.13%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 1 · Related 5
USN-8374-1USN-8277-1USN-8277-2USN-8310-1USN-8508-1

Timeline

  1. 23-01-2026
    PublishedVulnerability first disclosed.
  2. 05-08-2026
    Last modifiedVulnerability information updated.

Description

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 metrics

5 scores · 4 sources · 2 versions

EPSS trend

Probability

0.13%

Chance of exploitation in the next 30 days

Percentile

3%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.13% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu100 products
  • linux< 6.17.0-29.29
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws< 6.17.0-1015.15
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 5deafa27d9ae040b75d392f60b12e300b42b4792, < 2af2abbcbf8573100288e8f8aea2dab8a2a0ceb7 | ≥ 5deafa27d9ae040b75d392f60b12e300b42b4792, < 2f393c228cc519ddf19b8c6c05bf15723241aa96 | 919efcadb63fc3d3a82c3de7194140e0b28903dc | ≥ 6.17.4, < 6.18 | 6.18
  • linux_kernel≥ 6.17.4, < 6.18 | ≥ 6.18, < 6.18.4
Debian1 product
  • linux< 6.18.5-1

3 vendors · 103 products

References

11 links
Show all 11 references