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CVE Record

CVE-2026-46152: wifi: mac80211: drop stray 'static' from fast-RX rx_result

In the Linux kernel, the following vulnerability has been resolved: wifi: mac80211: drop stray 'static' from fast-RX rx_result ieee80211_invoke_fast_rx() is documented as safe for parallel RX, but its per-invocation rx_result is declared static. Concurrent callers then share one instance and can overwrite each other's result between ieee80211_rx_mesh_data() and the switch on res. That can make a packet that was queued or consumed by ieee80211_rx_mesh_data() fall through into ieee80211_rx_8023(), or make a packet that should continue return as queued. Make res an automatic variable so each invocation keeps its own result.

HighCVSS 8.8Not KEV-listedUpdated
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Glexia's TakeAutomated analysishigh

Security readout for executives and security teams

Plain-English summary

A Linux Wi-Fi kernel bug can mishandle packets during parallel receive processing. The published CVSS score is high, with adjacent-network attack scope and potential confidentiality, integrity, and availability impact. The evidence points to affected Linux kernels and mac80211 Wi-Fi paths, not a broad internet-facing service issue.

Executive priority

Treat as a high-priority kernel update for wireless-capable Linux assets, especially operational devices using Wi-Fi. It is not evidenced as actively exploited, but the CVSS impact is high and remediation is kernel-level.

Technical view

mac80211 fast-RX used a static rx_result where a per-call variable was expected. Concurrent RX callers could overwrite the shared result after ieee80211_rx_mesh_data(), causing packets to continue into ieee80211_rx_8023() incorrectly or return as queued when they should continue. Upstream stable commits change the result variable to automatic storage.

Likely exposure

Likely exposure is Linux systems running affected kernels with Wi-Fi/mac80211 receive paths in use. The CVSS vector is AV:A, so the modeled attacker is adjacent, not remote over the internet. Product-specific exposure should be confirmed against vendor advisories.

Exploitation context

The bundle does not cite active exploitation, and KEV is false. The described condition is a concurrency race in Wi-Fi receive handling. Public sources provided do not include exploit details or proof-of-concept status.

Researcher notes

Evidence is strong for the root cause and fix direction from kernel commit references. The bundle does not provide exploitability detail beyond the CVSS vector or confirm which distributions are affected outside listed Linux and Red Hat references.

Mitigation direction

  • Apply vendor kernel updates that include the referenced upstream stable fixes.
  • For Red Hat systems, review the listed RHSA advisories for applicable packages.
  • Track distribution advisories for backported fixes matching CVE-2026-46152.
  • Where patching is delayed, reduce reliance on affected Wi-Fi paths where operationally feasible.

Validation and detection

  • Inventory Linux kernel versions on systems using Wi-Fi interfaces.
  • Check vendor package advisories for CVE-2026-46152 applicability and fixed builds.
  • Confirm deployed kernels include the stable fix commits or vendor backports.
  • Prioritize devices using wireless mesh or mac80211-based Wi-Fi receive paths.
Prepared
Confidence
medium
Sources
12

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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ATT&CK lookup starting points

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cwe · low confidence lookup

CWE-1058: Exact CWE lookup

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cve · low confidence lookup

CVE-2026-46152 mapping review

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Vulnerability profileCVE Program record
Severity
High
CVSS
8.8 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:A/AC:L/PR:N/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.

2CVSS vectors
5Timeline events
1ADP providers
15Source links

CVSS vector scores

2 official scores

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
8.8CVSS 3.1HighCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H2.85.9Linux
7CVSS 3.1HighCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H15.9redhat-SADP

Vulnerability scoring details

Base CVSS 3.1 score

8.8High
CVSS 3.1 vector shape for CVE-2026-46152Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:A/AC:L/PR:N/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. ADP timelineredhat-SADP

    Reported to Red Hat.

  3. ADP timelineredhat-SADP

    Made public.

  4. CVE publishedCVE Program

    The CVE record was published.

  5. CVE updatedCVE Program

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

ADP provider summaries

redhat-SADPkernel: wifi: mac80211: drop stray 'static' from fast-RX rx_result
other:Red Hat severity ratingcvssV3_1
  • 2026-05-28T00:00:00.000Z: Reported to Red Hat.
  • 2026-05-28T00:00:00.000Z: Made public.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinux3468e1e0c639032a603450f0830ccabfa76f5806, 3468e1e0c639032a603450f0830ccabfa76f5806, 3468e1e0c639032a603450f0830ccabfa76f5806, 3468e1e0c639032a603450f0830ccabfa76f5806, 3468e1e0c639032a603450f0830ccabfa76f5806unaffected
LinuxLinux6.4, 0, 6.6.140, 6.12.88, 6.18.30, 7.0.7, 7.1affected
Weakness

CWE details

CWE-1058

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

CWE-1058 · source CWE mapping

Invokable Control Element in Multi-Thread Context with non-Final Static Storable or Member Element

Invokable Control Element in Multi-Thread Context with non-Final Static Storable or Member Element represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.

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