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CVE-2025-38643: wifi: cfg80211: Add missing lock in cfg80211_check_and_end_cac()

mediumCVSS 5.5CVE-2025-38643

CSIRTS triage

vendor: Linuxproduct: Linux kernelMemory corruption
What
Missing lock in cfg80211_check_and_end_cac() causes unsynchronized access to shared state.
Who is affected
Systems using cfg80211 wireless configuration with CAC (Channel Availability Check).
Urgency
Medium priority; not currently exploited but affects WiFi configuration locking.
Action
Apply kernel patch adding proper locking to cfg80211_check_and_end_cac().

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-2025-38643

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.

Referenced CVEs

CVECSIRTS overviewExternal
CVE-2025-38643coverage & exploitation statusNVD · CVE.org

Same CVEs, other sources

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

Recent advisories for wifi

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

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