CVE-2025-71127

Wi-Fi disruption via accepted unicast Beacons

Published Jan 14, 2026 · Updated Jan 14, 2026

Improper beacon validation in affected Linux Kernel releases allows physically proximate attackers to disrupt Wi-Fi connectivity. The mac80211 receive path accepts protected unicast Beacon frames as valid because its BIGTK check does not reject a nonbroadcast Address 1. An unauthenticated transmitter within radio range can forge Beacons that alter channel or link state and sustain loss of Wi-Fi service.

CVSS severity7.1
High
EPSS probability0.22%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper beacon validation in affected Linux Kernel releases allows physically proximate attackers to disrupt Wi-Fi connectivity. The mac80211 receive path accepts protected unicast Beacon frames as valid because its BIGTK check does not reject a nonbroadcast Address 1. An unauthenticated transmitter within radio range can forge Beacons that alter channel or link state and sustain loss of Wi-Fi service.

The record

CVE
CVE-2025-71127
Published
Jan 14, 2026
Updated
Jan 14, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
T1498
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 14, 2026CVE publishedPublication date reported by the CVE source.
  2. Jan 14, 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=5.7
  2. Affected versionversion=af2d14b01c32d7cba65f73503586e5b621afb139 <193d18f60588e95d62e0f82b6a53893e5f2f19f8
  3. Affected versionversion=af2d14b01c32d7cba65f73503586e5b621afb139 <6e5bff40bb38741e40c33043ba0816fba5f93661
  4. Affected versionversion=af2d14b01c32d7cba65f73503586e5b621afb139 <7b240a8935d554ad36a52c2c37c32039f9afaef2
  5. Affected versionversion=af2d14b01c32d7cba65f73503586e5b621afb139 <88aab153d1528bc559292a12fb5105ee97528e1f
  6. Affected versionversion=af2d14b01c32d7cba65f73503586e5b621afb139 <a21704df4024708be698fb3fd5830d5b113b70e0

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=5.7; version=af2d14b01c32d7cba65f73503586e5b621afb139 <193d18f60588e95d62e0f82b6a53893e5f2f19f8; version=af2d14b01c32d7cba65f73503586e5b621afb139 <6e5bff40bb38741e40c33043ba0816fba5f93661; version=af2d14b01c32d7cba65f73503586e5b621afb139 <7b240a8935d554ad36a52c2c37c32039f9afaef2; version=af2d14b01c32d7cba65f73503586e5b621afb139 <88aab153d1528bc559292a12fb5105ee97528e1f; version=af2d14b01c32d7cba65f73503586e5b621afb139 <a21704df4024708be698fb3fd5830d5b113b70e0

Published CVSS scores

7.1kernel.orgCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H
5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/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

T1498Network Denial of Service

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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