CVE-2026-98406Public exploitHinoki check available

Kernel warning via unchecked wireless interface state

Published Oct 14, 2026 · Updated Oct 14, 2026

State validation failure in Linux mac80211 allows local users to trigger a kernel warning through a wireless bitrate-setting ioctl. The ieee80211_set_bitrate_mask() function checks whether an interface is running but calls the driver without checking IEEE80211_SDATA_IN_DRIVER. The path requires a running interface absent from its driver during bringup or teardown; the published finding establishes a warning, not a crash.

CVSS severityUnavailable
Unscored
EPSS probability0.22%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

State validation failure in Linux mac80211 allows local users to trigger a kernel warning through a wireless bitrate-setting ioctl. The ieee80211_set_bitrate_mask() function checks whether an interface is running but calls the driver without checking IEEE80211_SDATA_IN_DRIVER. The path requires a running interface absent from its driver during bringup or teardown; the published finding establishes a warning, not a crash.

The record

CVE
CVE-2026-98406
Published
Oct 14, 2026
Updated
Oct 14, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. Oct 14, 2026CVE publishedPublication date reported by the CVE source.
  2. Oct 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=3.5
  2. Affected versionversion=554a43d5e77e8256aa9685ffd19ad555e6f77979 <0d1700394e9f5d0bd9bebad8d5a50edf983f52fd
  3. Affected versionversion=554a43d5e77e8256aa9685ffd19ad555e6f77979 <4095b66acae9893dd13deb39a4331651cb2f822b
  4. Affected versionversion=554a43d5e77e8256aa9685ffd19ad555e6f77979 <432c8532d5ccc2af77da43ed6ef1c80495a4efe8
  5. Affected versionversion=554a43d5e77e8256aa9685ffd19ad555e6f77979 <4ba86c44b2fcb1c3175caa2456b6d58f483446ab
  6. Affected versionversion=554a43d5e77e8256aa9685ffd19ad555e6f77979 <7978dda63d2b109ea9c3f7a096cd1aac6542cd54
  7. Affected versionversion=554a43d5e77e8256aa9685ffd19ad555e6f77979 <c2cd9c44777cf97be3e35c10b7c2d8f59ebb9306
  8. Affected versionversion=554a43d5e77e8256aa9685ffd19ad555e6f77979 <c4ee5685af444024e6222ce29f6ed36adc44ffc3
  9. Affected versionversion=554a43d5e77e8256aa9685ffd19ad555e6f77979 <da2ca406f45a6e21760243152ed8d2e8e72915c2

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=3.5; version=554a43d5e77e8256aa9685ffd19ad555e6f77979 <0d1700394e9f5d0bd9bebad8d5a50edf983f52fd; version=554a43d5e77e8256aa9685ffd19ad555e6f77979 <4095b66acae9893dd13deb39a4331651cb2f822b; version=554a43d5e77e8256aa9685ffd19ad555e6f77979 <432c8532d5ccc2af77da43ed6ef1c80495a4efe8; version=554a43d5e77e8256aa9685ffd19ad555e6f77979 <4ba86c44b2fcb1c3175caa2456b6d58f483446ab; version=554a43d5e77e8256aa9685ffd19ad555e6f77979 <7978dda63d2b109ea9c3f7a096cd1aac6542cd54; version=554a43d5e77e8256aa9685ffd19ad555e6f77979 <c2cd9c44777cf97be3e35c10b7c2d8f59ebb9306; version=554a43d5e77e8256aa9685ffd19ad555e6f77979 <c4ee5685af444024e6222ce29f6ed36adc44ffc3; version=554a43d5e77e8256aa9685ffd19ad555e6f77979 <da2ca406f45a6e21760243152ed8d2e8e72915c2

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.

Activity data is delayed. The latest report is Sep 28, 2026.

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No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

No sourced classifications are available.

Public exploit references

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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