CVE-2024-49937: wifi: cfg80211: Set correct chandef when starting CAC

mediumCVSS 5.5CVE-2024-49937

CSIRTS triage

vendor: Linux product: Linux kernelOther

What: The cfg80211 wireless subsystem sets incorrect channel definition when starting CAC (Channel Availability Check).
Who is affected: Linux systems with WiFi drivers using cfg80211 for CAC operations.
Urgency: Low to moderate; functional issue affecting WiFi compliance.
Action: Apply kernel patch to correctly set chandef during CAC initiation.

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-2024-49937

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-2024-499370.24% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 15% of all EPSS-scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2024-49937	coverage & exploitation status	NVD · CVE.org

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