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CVE Record

CVE-2024-40930: wifi: cfg80211: validate HE operation element parsing

In the Linux kernel, the following vulnerability has been resolved: wifi: cfg80211: validate HE operation element parsing Validate that the HE operation element has the correct length before parsing it.

HighCVSS 7.1Not KEV-listedUpdated
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Glexia's TakeAutomated analysishigh

Security readout for executives and security teams

Plain-English summary

A nearby attacker may send a malformed Wi-Fi 6 management element that an affected Linux kernel parses without first confirming its length. The resulting out-of-bounds processing may expose limited information or significantly disrupt availability. The CVSS score is 7.1.

Executive priority

Treat this as a high-priority Wi-Fi-adjacent risk, especially for operationally important Linux endpoints. Patch through supported distribution channels after compatibility testing. Internet exposure alone does not establish reachability, but nearby hostile wireless activity may.

Technical view

Linux cfg80211 parsed an HE operation element without adequately validating its length. The kernel fixes add length validation before parsing. The supplied CVSS vector requires adjacent-network access, but no privileges or user interaction; it rates confidentiality impact low and availability impact high.

Likely exposure

Prioritize Linux systems with active Wi-Fi hardware that process nearby 802.11 HE traffic. The supplied record identifies affected kernel versions including 6.8 through 6.9.6 and references fixes, but distribution-specific package status is not provided.

Exploitation context

The supplied bundle does not identify CVE-2024-40930 as CISA KEV-listed and provides no evidence of active exploitation or a public exploit. Exploitation would require adjacent-network reachability, such as proximity to a targeted wireless interface.

Researcher notes

The public description establishes insufficient HE operation element length validation before parsing. The supplied material does not specify the precise out-of-bounds primitive, affected distributions, observable crash signature, or proven exploitability. Avoid extending the CVSS impacts into claims of code execution.

Mitigation direction

  • Upgrade to a vendor-supported kernel containing the referenced upstream or stable fix.
  • Check distribution advisories for the exact fixed package version.
  • Reduce unnecessary Wi-Fi exposure until affected systems are updated.
  • Prioritize remotely managed, unattended, or availability-sensitive wireless systems.

Validation and detection

  • Inventory Linux kernel versions on systems with enabled Wi-Fi interfaces.
  • Compare installed packages against distribution advisories and the referenced kernel fixes.
  • Confirm the replacement kernel is active after updating and restarting.
  • Monitor wireless-facing systems for unexplained crashes, resets, or information-exposure indicators.
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

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-2024-40930 mapping review

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Vulnerability profileCVE Program record
Severity
High
CVSS
7.1 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H

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.

1CVSS vectors
3Timeline events
2ADP providers
3Source links

SSVC decision data

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

CVSS vector scores

1 official score

We collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.

ScoreVersionSeverityVectorExploitImpactSource
7.1CVSS 3.1HighCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H2.84.2Linux

Vulnerability scoring details

Base CVSS 3.1 score

7.1High
CVSS 3.1 vector shape for CVE-2024-40930Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

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

CVECVE Program Container
CISA-ADPCISA ADP Vulnrichment
other:ssvc

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinux645f3d85129d8aac3b896ba685fbc20a31c2c036, 645f3d85129d8aac3b896ba685fbc20a31c2c036unaffected
LinuxLinux6.8, 0, 6.9.6, 6.10affected
Weakness

CWE details

No CWE listed

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