CVE-2026-74601: ring-buffer: Use current_context for safe per-CPU buffer swap

CSIRTS triage

What

Ring buffer per-CPU swap operation uses incorrect context, potentially causing race conditions or corruption.

Who is affected

Systems running vulnerable Linux kernel versions with ring buffer tracing enabled.

Urgency

Medium priority; synchronization issue in kernel tracing infrastructure.

Action

Apply kernel security update addressing CVE-2026-74601 when available.

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 4.1

Published

2026-08-11

Exploitation

Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-74601

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-2026-746010.14% 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

Same CVEs, other sources

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

• medium[NEW] [medium] Linux Kernel: Multiple vulnerabilities allow unspecified attackcert-bund
• highCVE-2026-74601: In the Linux kernel, the following vulnerability has been resolved: ring-buffer: Use current_c…nvd

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