CVE-2025-38359: s390/mm: Fix in_atomic() handling in do_secure_storage_access()

mediumCVSS 5.5CVE-2025-38359

CSIRTS triage

vendor: Linux product: Linux KernelOther

What: A fix for incorrect in_atomic() handling in s390 memory management code.
Who is affected: Systems running affected Linux kernel versions on s390 architecture.
Urgency: Medium severity (CVSS 5.5); appears to be a defensive fix for existing code.
Action: Apply kernel patch when available or update to next stable release.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source: Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity: medium — CVSS 5.5
Published: 2026-08-06
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-38359

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Low exploitation riskCVE-2025-383590.11% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 1% of all EPSS-scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2025-38359	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

high[UPDATE] [hoch] Linux Kernel: Mehrere Schwachstellencert-bund

Recent advisories for s390/mm

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

criticalCVE-2026-72412: In the Linux kernel, the following vulnerability has been resolved: s390/mm: Fix handling of _…nvd · 2026-08-15
highCVE-2026-31568: s390/mm: Add missing secure storage access fixups for donated memorymsrc · 2026-08-06