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CVE Record

CVE-2024-43912: wifi: nl80211: disallow setting special AP channel widths

In the Linux kernel, the following vulnerability has been resolved: wifi: nl80211: disallow setting special AP channel widths Setting the AP channel width is meant for use with the normal 20/40/... MHz channel width progression, and switching around in S1G or narrow channels isn't supported. Disallow that.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysisunknown

Security readout for executives and security teams

Plain-English summary

This Linux kernel issue restricts unsupported Wi-Fi access point channel-width changes. The public sources do not describe business impact, active exploitation, or a CVSS score. Treat it as a kernel maintenance item, with higher attention for systems using Linux wireless access point functionality.

Executive priority

Handle through normal kernel patch governance unless wireless AP infrastructure is business-critical. There is no supplied evidence of active exploitation or severe impact, but affected Linux wireless roles should be patched promptly.

Technical view

CVE-2024-43912 concerns Linux kernel nl80211 handling of AP channel width settings. The fix disallows special S1G or narrow-channel width changes where only normal 20/40 MHz-style progression is supported. Public data lists affected Linux kernel versions and stable commits, but not exploitability or impact details.

Likely exposure

Exposure is most plausible on Linux systems using Wi-Fi access point or nl80211-managed wireless functionality. General servers without wireless hardware or AP roles are likely lower priority, but kernel package applicability should still be verified through distribution advisories.

Exploitation context

CISA KEV is false in the supplied bundle, and no cited source reports active exploitation. The sources provide fix references but do not provide exploit prerequisites, demonstrated attacks, or practical abuse conditions.

Researcher notes

The source bundle lacks CVSS, CWE, and impact analysis. Research should focus on the referenced stable commits, affected kernel ranges, and whether local configuration paths can trigger unsupported AP channel-width transitions.

Mitigation direction

  • Update Linux kernels to vendor-supported releases that include the referenced stable fixes.
  • Apply Debian LTS kernel updates where Debian systems are in scope.
  • Prioritize systems operating Wi-Fi AP or nl80211-managed wireless functionality.
  • Monitor Linux distribution advisories for backported kernel packages.
  • Follow vendor guidance where fixed package versions differ from upstream kernel numbers.

Validation and detection

  • Inventory Linux kernel versions on systems with wireless interfaces or AP functionality.
  • Confirm installed kernel packages include fixes for CVE-2024-43912.
  • Review kernel changelogs for the referenced nl80211 AP channel-width fix.
  • Check Debian LTS advisory applicability for Debian LTS hosts.
  • Record systems without wireless capability as lower exposure, pending vendor guidance.
Prepared
Confidence
medium
Sources
7

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

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CVE-2024-43912 mapping review

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors
3Timeline events
2ADP providers
6Source links

SSVC decision data

CISA-ADPCISA Coordinator
Timestamp
Version
2.0.3
Exploitation: noneAutomatable: noTechnical Impact: partial

Vulnerability timeline

Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.

  1. CVE reservedCVE Program

    The CVE ID was reserved by the assigning CNA.

  2. CVE publishedCVE Program

    The CVE record was published.

  3. CVE updatedCVE Program

    The CVE record metadata indicates this as the latest update time.

ADP provider summaries

CISA-ADPCISA ADP Vulnrichment
other:ssvc
CVECVE Program Container

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinuxe16821bcfb364b0c41142db275dc74b39fa42c30, e16821bcfb364b0c41142db275dc74b39fa42c30, e16821bcfb364b0c41142db275dc74b39fa42c30, e16821bcfb364b0c41142db275dc74b39fa42c30unaffected
LinuxLinux3.16, 0, 6.1.105, 6.6.46, 6.10.5, 6.11affected
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.