CVE-2025-71227: wifi: mac80211: don't WARN for connections on invalid channels

mediumCVSS 5.5CVE-2025-71227

CSIRTS triage

vendor: Linux product: Linux Kernel Denial of service

What: A WARN condition in mac80211 that can be triggered by connections on invalid wireless channels.
Who is affected: Linux systems with WiFi mac80211 driver in use.
Urgency: Medium priority; causes kernel warnings and potential DoS but not actively exploited.
Action: Update to a patched Linux kernel version addressing CVE-2025-71227.

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-2025-71227

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-2025-712270.10% 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-2025-71227	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

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

high[UPDATE] [high] Linux Kernel: Multiple vulnerabilitiescert-bund

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