CVE-2026-31568: s390/mm: Add missing secure storage access fixups for donated memory
CSIRTS triage
- What
- Missing secure storage access fixups for donated memory in s390 memory management allow improper memory access.
- Who is affected
- Systems running Linux kernel with s390 architecture.
- Urgency
- High severity (CVSS 7.1) with memory corruption risk; patch promptly.
- Action
- Update Linux kernel to a version with the s390/mm secure storage access fixup applied.
AI-assisted analysis generated from the source advisory — verify against the original.
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Details
Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-31568
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-2026-315680.12% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 3% of all EPSS-scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2026-31568 | coverage & exploitation status | NVD · CVE.org |
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