CVE-2025-38524: rxrpc: Fix recv-recv race of completed call

CSIRTS triage

What

A race condition exists between receive operations on completed calls in the rxrpc subsystem.

Who is affected

Systems using the Linux rxrpc protocol implementation.

Urgency

Medium severity (CVSS 4.7) and not yet exploited; standard patching cycle acceptable.

Action

Update to the latest kernel version containing the rxrpc recv-recv race fix.

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 4.7

Published

2026-08-06

Exploitation

Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-38524

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-2025-385240.26% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 18% of all EPSS-scored CVEs.

Referenced CVEs

Same CVEs, other sources

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

• high[UPDATE] [high] Linux Kernel: Multiple Vulnerabilitiescert-bund