CVE-2026-80641

Wi-Fi disruption via repeated cipher-list decrement

Published Aug 28, 2026 · Updated Aug 28, 2026

Denial of service in Linux 7.0 allows local users to trigger endless wlcore hardware recovery when wl128x Wi-Fi connects to an access point. wl12xx_init_fw checks only a firmware-version field and repeatedly decrements wiphy->n_cipher_suites across boots instead of assigning a chip-appropriate cipher count. The condition requires wl12xx hardware and affected firmware; failed key installation then cycles the wireless interface through recovery and restart.

CVSS severityUnavailable
Unscored
EPSS probability0.15%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in Linux 7.0 allows local users to trigger endless wlcore hardware recovery when wl128x Wi-Fi connects to an access point. wl12xx_init_fw checks only a firmware-version field and repeatedly decrements wiphy->n_cipher_suites across boots instead of assigning a chip-appropriate cipher count. The condition requires wl12xx hardware and affected firmware; failed key installation then cycles the wireless interface through recovery and restart.

The record

CVE
CVE-2026-80641
Published
Aug 28, 2026
Updated
Aug 28, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. Aug 28, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 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=7.0
  2. Affected versionversion=c34dbc5900b0158edaab51c481510d66679d8f72 <7495adaa0e45e180f4b6b7436675c6266edff1ff
  3. Affected versionversion=c34dbc5900b0158edaab51c481510d66679d8f72 <ff9748200698e9641f41ba922ffef728167807c2

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=7.0; version=c34dbc5900b0158edaab51c481510d66679d8f72 <7495adaa0e45e180f4b6b7436675c6266edff1ff; version=c34dbc5900b0158edaab51c481510d66679d8f72 <ff9748200698e9641f41ba922ffef728167807c2

Published CVSS scores

No CVSS assessment is available in this record.

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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