CVE-2026-74366

Kernel crash via unready ath12k link bitmap

Published Aug 15, 2026 · Updated Aug 15, 2026

NULL pointer dereference in Linux 6.14 through 6.18.39 and 6.19 through 7.1.4 allows local users to crash the kernel during ath12k link handling. ath12k_mac_op_change_sta_links adds an uncreated link to links_map before checking arvif->is_created, leaving later code to dereference the NULL arvif->ar pointer. The crash requires supported ath12k hardware, a newly added link whose channel validation fails, and a later operation such as disconnecting or installing PTK keys.

CVSS severity5.5
Medium
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

NULL pointer dereference in Linux 6.14 through 6.18.39 and 6.19 through 7.1.4 allows local users to crash the kernel during ath12k link handling. ath12k_mac_op_change_sta_links adds an uncreated link to links_map before checking arvif->is_created, leaving later code to dereference the NULL arvif->ar pointer. The crash requires supported ath12k hardware, a newly added link whose channel validation fails, and a later operation such as disconnecting or installing PTK keys.

The record

CVE
CVE-2026-74366
Published
Aug 15, 2026
Updated
Aug 15, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 15, 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=6.14
  2. Affected versionversion=a27fa6148dacc79451e523c2694bc0a673b1be05 <47809a7c8348bc4a332ccc26a37c7145a5f609f8
  3. Affected versionversion=a27fa6148dacc79451e523c2694bc0a673b1be05 <5f5be2aa3b6d730c51dd4f8b432f2ad72823e63f
  4. Affected versionversion=a27fa6148dacc79451e523c2694bc0a673b1be05 <cfcea221db933295bf2cd75a7f80d441c7a51e28

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.14; version=a27fa6148dacc79451e523c2694bc0a673b1be05 <47809a7c8348bc4a332ccc26a37c7145a5f609f8; version=a27fa6148dacc79451e523c2694bc0a673b1be05 <5f5be2aa3b6d730c51dd4f8b432f2ad72823e63f; version=a27fa6148dacc79451e523c2694bc0a673b1be05 <cfcea221db933295bf2cd75a7f80d441c7a51e28

Published CVSS scores

5.5TenableCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
4.9TenableAV:L/AC:L/Au:N/C:N/I:N/A:C

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)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499.004Endpoint Denial of Service: Application 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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