CVE-2026-74325

Local privilege escalation via offchannel link use-after-free

Published Aug 15, 2026 · Updated Aug 15, 2026

Use-after-free in the mt76 Wi-Fi driver in affected Linux kernels starting at 6.14 allows local users to escalate privileges. mt76_put_vif_phy_link assigns NULL to the RCU pointer and immediately frees the offchannel mlink, while an existing TX reader can still dereference its wcid and idx fields. Reaching the race requires local nl80211 access with CAP_NET_ADMIN and affected mt76 hardware; exploitation can disclose or corrupt kernel memory or crash the system.

CVSS severity7.8
High
EPSS probability0.13%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in the mt76 Wi-Fi driver in affected Linux kernels starting at 6.14 allows local users to escalate privileges. mt76_put_vif_phy_link assigns NULL to the RCU pointer and immediately frees the offchannel mlink, while an existing TX reader can still dereference its wcid and idx fields. Reaching the race requires local nl80211 access with CAP_NET_ADMIN and affected mt76 hardware; exploitation can disclose or corrupt kernel memory or crash the system.

The record

CVE
CVE-2026-74325
Published
Aug 15, 2026
Updated
Aug 15, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-416, T1068
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=a8f424c1287cc79a06c21816658feea87dfcb83f <50e700ac0edce72dee5c3a9755865d9423696ac7
  3. Affected versionversion=a8f424c1287cc79a06c21816658feea87dfcb83f <7fae097aa9a56c30febf539d72ef3773165d3aa3
  4. Affected versionversion=a8f424c1287cc79a06c21816658feea87dfcb83f <c7a83899203ed36696a2d35ddd03c0f522874a63

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.14; version=a8f424c1287cc79a06c21816658feea87dfcb83f <50e700ac0edce72dee5c3a9755865d9423696ac7; version=a8f424c1287cc79a06c21816658feea87dfcb83f <7fae097aa9a56c30febf539d72ef3773165d3aa3; version=a8f424c1287cc79a06c21816658feea87dfcb83f <c7a83899203ed36696a2d35ddd03c0f522874a63

Published CVSS scores

7.8LinuxCVSS:3.1/AV:L/AC:L/PR:L/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)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-416Use After Free
T1068Exploitation for Privilege Escalation

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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