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CVE Record

CVE-2024-26683: wifi: cfg80211: detect stuck ECSA element in probe resp

In the Linux kernel, the following vulnerability has been resolved: wifi: cfg80211: detect stuck ECSA element in probe resp We recently added some validation that we don't try to connect to an AP that is currently in a channel switch process, since that might want the channel to be quiet or we might not be able to connect in time to hear the switching in a beacon. This was in commit c09c4f31998b ("wifi: mac80211: don't connect to an AP while it's in a CSA process"). However, we promptly got a report that this caused new connection failures, and it turns out that the AP that we now cannot connect to is permanently advertising an extended channel switch announcement, even with quiet. The AP in question was an Asus RT-AC53, with firmware 3.0.0.4.380_10760-g21a5898. As a first step, attempt to detect that we're dealing with such a situation, so mac80211 can use this later.

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 Wi-Fi issue can cause affected clients to mishandle access points that continuously advertise an extended channel switch announcement. The reported impact is connection failure or unreliable Wi-Fi association, not confirmed system compromise. Severity is not scored in the supplied sources.

Executive priority

Treat as a patch-tracking item unless Wi-Fi availability is business critical. There is no sourced evidence of active exploitation or data compromise, but affected wireless endpoints may experience operational connectivity failures.

Technical view

The flaw is in cfg80211/mac80211 handling of probe responses containing a stuck ECSA element. A prior validation blocked connecting to APs during channel switch announcements; some APs permanently advertise ECSA, causing failures. Kernel stable commits add detection for this condition.

Likely exposure

Exposure appears limited to Linux systems using affected kernel versions around 6.7/6.8 with Wi-Fi client functionality. Systems without Wi-Fi, non-Linux systems, or kernels with the stable fixes are not indicated as exposed by the supplied sources.

Exploitation context

No supplied source reports active exploitation, and CISA KEV status is false. The source describes an observed interoperability problem with an Asus RT-AC53 firmware advertising ECSA persistently, not a public exploit or attacker workflow.

Researcher notes

The record lacks CVSS, CWE, exploitability details, and package-level fixed versions. Analysis should stay focused on kernel cfg80211/mac80211 ECSA handling and distribution backport status, not broader Wi-Fi attack claims.

Mitigation direction

  • Inventory Linux endpoints using affected 6.7 or 6.8 kernel builds.
  • Apply kernel or distribution updates containing the referenced stable fixes.
  • Check vendor advisories for exact fixed package versions.
  • Prioritize Wi-Fi-dependent laptops, workstations, and edge devices.

Validation and detection

  • Confirm running kernel versions against distribution security advisories.
  • Verify fixed kernels include the referenced stable commit backports.
  • Review Wi-Fi connection failures involving CSA or ECSA indications.
  • Test affected wireless clients after kernel updates.
Prepared
Confidence
medium
Sources
4

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

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CVE-2024-26683 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
3Source 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
LinuxLinuxc09c4f31998bac6d73508e38812518aceb069b68, c09c4f31998bac6d73508e38812518aceb069b68unaffected
LinuxLinux6.7, 0, 6.7.5, 6.8affected
Weakness

CWE details

No CWE listed

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