CVE-2026-46152

Packet misrouting via shared fast-RX result

Published May 28, 2026 · Updated May 28, 2026

Race condition in the Linux kernel mac80211 fast-RX path allows attackers to misroute received mesh packets during concurrent processing. The ieee80211_invoke_fast_rx function stores its per-call rx_result in a static variable, so parallel callers can overwrite the value after mesh handling and before the result switch. Reachability requires concurrent reception through the mac80211 mesh fast-RX path; the race can pass an already consumed packet to ieee80211_rx_8023 or suppress a packet that should continue.

CVSS severity8.8
High
EPSS probability0.17%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Race condition in the Linux kernel mac80211 fast-RX path allows attackers to misroute received mesh packets during concurrent processing. The ieee80211_invoke_fast_rx function stores its per-call rx_result in a static variable, so parallel callers can overwrite the value after mesh handling and before the result switch. Reachability requires concurrent reception through the mac80211 mesh fast-RX path; the race can pass an already consumed packet to ieee80211_rx_8023 or suppress a packet that should continue.

The record

CVE
CVE-2026-46152
Published
May 28, 2026
Updated
May 28, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-1058, T1498.001
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 28, 2026CVE publishedPublication date reported by the CVE source.
  2. May 28, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=3468e1e0c639032a603450f0830ccabfa76f5806 <03584528bfffb195e384698af9148b94e42e3f14
  2. Affected versionversion=3468e1e0c639032a603450f0830ccabfa76f5806 <1739fc31b4de06c5c78ce0741182770fb079091e
  3. Affected versionversion=3468e1e0c639032a603450f0830ccabfa76f5806 <3ef44f96ccc3e06e059dec57842e366f0c4b1893
  4. Affected versionversion=3468e1e0c639032a603450f0830ccabfa76f5806 <7a5b81e0c87a075afd572f659d8eb68c9c4cd2ba
  5. Affected versionversion=3468e1e0c639032a603450f0830ccabfa76f5806 <e131562d6f2b958148c35c98831b007f47f0e3d3
  6. Affected versionversion=6.4

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=3468e1e0c639032a603450f0830ccabfa76f5806 <03584528bfffb195e384698af9148b94e42e3f14; version=3468e1e0c639032a603450f0830ccabfa76f5806 <1739fc31b4de06c5c78ce0741182770fb079091e; version=3468e1e0c639032a603450f0830ccabfa76f5806 <3ef44f96ccc3e06e059dec57842e366f0c4b1893; version=3468e1e0c639032a603450f0830ccabfa76f5806 <7a5b81e0c87a075afd572f659d8eb68c9c4cd2ba; version=3468e1e0c639032a603450f0830ccabfa76f5806 <e131562d6f2b958148c35c98831b007f47f0e3d3; version=6.4

Published CVSS scores

7.0Red HatCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
8.8Linux kernel CVE teamCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
8.8CanonicalCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-1058Invokable Control Element in Multi-Thread Context with non-Final Static Storable or Member Element
T1498.001Direct Network Flood

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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