CVE-2023-53086

System crash via non-MMIO WED status check

Published May 2, 2025 · Updated Aug 5, 2026

Denial of service in the Linux kernel mt76 connac driver 6.2 allows local users to crash the kernel during USB or SDIO Wi-Fi use. The mt76 connac key-add path checks WED status for non-MMIO USB and SDIO devices, causing an NX-protected-page instruction fetch. The affected driver and a supported MediaTek adapter must be in use; successful association can trigger a kernel oops and service interruption.

CVSS severity5.5
Medium
EPSS probability0.20%
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 the Linux kernel mt76 connac driver 6.2 allows local users to crash the kernel during USB or SDIO Wi-Fi use. The mt76 connac key-add path checks WED status for non-MMIO USB and SDIO devices, causing an NX-protected-page instruction fetch. The affected driver and a supported MediaTek adapter must be in use; successful association can trigger a kernel oops and service interruption.

The record

CVE
CVE-2023-53086
Published
May 2, 2025
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 2, 2025CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 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=6.2
  2. Affected versionversion=d1369e515efe6b5d04e9a5f5884106643f7b1d8a <53edfda851dd1ce41ac049ce2f195dc41dd27cc1
  3. Affected versionversion=d1369e515efe6b5d04e9a5f5884106643f7b1d8a <5683e1488aa9b0805a9403d215e48fed29d6d923

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.2; version=d1369e515efe6b5d04e9a5f5884106643f7b1d8a <53edfda851dd1ce41ac049ce2f195dc41dd27cc1; version=d1369e515efe6b5d04e9a5f5884106643f7b1d8a <5683e1488aa9b0805a9403d215e48fed29d6d923

Published CVSS scores

5.5CanonicalCVSS: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.

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

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

T1499.004Application 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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