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CVE Record

CVE-2024-35789: wifi: mac80211: check/clear fast rx for non-4addr sta VLAN changes

In the Linux kernel, the following vulnerability has been resolved: wifi: mac80211: check/clear fast rx for non-4addr sta VLAN changes When moving a station out of a VLAN and deleting the VLAN afterwards, the fast_rx entry still holds a pointer to the VLAN's netdev, which can cause use-after-free bugs. Fix this by immediately calling ieee80211_check_fast_rx after the VLAN change.

HighCVSS 8Not KEV-listedUpdated
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Glexia's TakeAutomated analysishigh

Security readout for executives and security teams

Plain-English summary

A Linux Wi-Fi networking flaw can leave the kernel using memory belonging to a deleted VLAN interface. Under the required conditions, this use-after-free could crash systems or potentially compromise data and system integrity. The supplied severity is high, with a CVSS 3.1 score of 8.0.

Executive priority

Treat as a high-priority infrastructure patch for Linux-based wireless access points, gateways, and appliances using the affected workflow. Prioritize externally reachable or shared wireless environments. Urgency is driven by potential kernel-level impact, although the bundle does not establish active exploitation.

Technical view

In mac80211, moving a non-4-address station out of a VLAN and then deleting that VLAN can leave fast_rx referencing the freed VLAN netdev. The documented correction immediately rechecks fast receive state with ieee80211_check_fast_rx after the VLAN change, clearing or updating the stale reference.

Likely exposure

Exposure is most likely on Linux systems using mac80211 Wi-Fi station VLAN functionality where stations are reassigned and VLAN interfaces are subsequently deleted. The supplied version data mixes kernel releases and commit identifiers, so organizations should map vendor kernel builds against official fixes rather than relying solely on version strings.

Exploitation context

The supplied CVSS vector indicates adjacent-network access, low privileges, low complexity, and no user interaction, with potentially high confidentiality, integrity, and availability impact. The CVE is not listed in KEV, and the supplied sources provide no evidence of active exploitation or a public exploit.

Researcher notes

The vulnerable lifetime sequence is VLAN detachment followed by VLAN netdev deletion while fast_rx retains the old pointer. Assessment should focus on whether deployed kernels contain the stable backport and whether operational configurations exercise non-4-address station VLAN transitions. The supplied material does not identify a CWE or demonstrate exploitability beyond the CVSS assessment.

Mitigation direction

  • Update to a supported vendor kernel containing the applicable stable fix.
  • Review Linux distribution and appliance vendor advisories for corrected package versions.
  • Prioritize Wi-Fi infrastructure that dynamically reassigns stations between VLANs.
  • If updates are delayed, obtain vendor guidance for supported temporary mitigations.

Validation and detection

  • Inventory Linux kernel versions on systems providing mac80211-based Wi-Fi services.
  • Identify systems using station VLAN reassignment and VLAN interface deletion workflows.
  • Compare deployed vendor packages with the referenced stable kernel fixes.
  • After updating, verify the running kernel matches the corrected vendor package.
  • Monitor affected systems for kernel crashes or memory-safety warnings around mac80211 operations.
Prepared
Confidence
high
Sources
5

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-2024-35789 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

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Vulnerability profileCVE Program record
Severity
High
CVSS
8 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/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
3ADP providers
13Source 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
8CVSS 3.1HighCVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H2.15.9Linux

Vulnerability scoring details

Base CVSS 3.1 score

8High
CVSS 3.1 vector shape for CVE-2024-35789Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

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

CISA-ADPCISA ADP Vulnrichment
other:ssvc
CVECVE Program Container
siemens-SADPADP container

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinuxa7f1721684628b8ae6015bca9a176046ee6f30cc, bd7e90c82850f49c23004d54de14e46d373748a6, cc413b375c6d95e68a4629cb1ba9d099de78ebb9, dd0b45538146cb6a54d6da7663b8c3afd16ebcfd, dd0b45538146cb6a54d6da7663b8c3afd16ebcfd, dd0b45538146cb6a54d6da7663b8c3afd16ebcfd, dd0b45538146cb6a54d6da7663b8c3afd16ebcfd, dd0b45538146cb6a54d6da7663b8c3afd16ebcfd, dd0b45538146cb6a54d6da7663b8c3afd16ebcfd, 22bc2a4814440c4a8979a381f46fec5d224f5c11, 7cfe824f681e1aaac34ea64bb4def8a77801b672, 4.19.189, 5.4.114, 5.10.32, 4.14.232, 5.11.16unaffected
LinuxLinux5.12, 0, 4.19.312, 5.4.274, 5.10.215, 5.15.154, 6.1.84, 6.6.24, 6.7.12, 6.8.3, 6.9affected
Weakness

CWE details

No CWE listed

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