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VulnerabilityPublished Updated

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

Source GCVE Database

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Not known to be exploited · CVSS 5.5 Medium.

Data as of 30 Oct 2026, 00:00 UTC

CVSS 3.1 base score
5.5Medium
How severe the flaw is on the 0–10 CVSS scale.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 21 Oct 2024

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 29 Oct 2026.

What to do

AI-suggested

Until a fix is applied, avoid starting CAC in modes other than AP mode to prevent triggering the kernel warning and instability. Monitor vendor channels for an official fix.

Description

CVE-2024-49937 is a medium severity vulnerability in the Linux kernel's wifi cfg80211 component. It occurs when starting Channel Availability Check (CAC) in modes other than AP mode, causing a null channel definition that triggers a kernel warning and potential instability. The issue is due to the chandef.chan being null at the end of CAC. The fix involves ensuring the channel definition is properly set for different modes when starting CAC.

References

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