CVE-2026-64248: MIPS: smp: report dying CPU to RCU in stop_this_cpu()

CSIRTS triage

What

This vulnerability involves reporting a dying CPU to RCU in the MIPS architecture.

Who is affected

Deployments using the affected MIPS SMP implementation.

Urgency

Remediation is necessary to ensure proper CPU reporting and system stability.

Action

Apply the fix for CVE-2026-64248.

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

Details

Source

Microsoft Security Response Center (INTL · vendor-psirt · site)

Severity

medium — CVSS 5.5

Published

2026-07-14

Exploitation

Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-64248

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-2026-642480.16% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 6% of all scored CVEs.

Referenced CVEs

Same CVEs, other sources

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

• medium[NEW] [medium] Linux Kernel: Multiple vulnerabilitiescert-bund
• unknownCVE-2026-64248: In the Linux kernel, the following vulnerability has been resolved: MIPS: smp: report dying CP…nvd

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