CVE-2026-68439

Local system crash via unchecked HE capability pointer

Published Aug 12, 2026 · Updated Aug 12, 2026

NULL-pointer dereference in the Linux kernel mt7925 Wi-Fi driver from 6.7 allows local users to crash systems through affected hardware. The mt7925_mcu_bss_he_tlv function dereferences the HE PHY capability returned by mt76_connac_get_he_phy_cap without first checking for NULL, causing a kernel oops when no capability is returned. Exploitation requires local low-privileged access and MediaTek mt7925 Wi-Fi hardware; systems without that hardware are unaffected.

CVSS severity5.5
Medium
EPSS probability0.16%
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 the Linux kernel mt7925 Wi-Fi driver from 6.7 allows local users to crash systems through affected hardware. The mt7925_mcu_bss_he_tlv function dereferences the HE PHY capability returned by mt76_connac_get_he_phy_cap without first checking for NULL, causing a kernel oops when no capability is returned. Exploitation requires local low-privileged access and MediaTek mt7925 Wi-Fi hardware; systems without that hardware are unaffected.

The record

CVE
CVE-2026-68439
Published
Aug 12, 2026
Updated
Aug 12, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-476, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 12, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 12, 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=6.7
  2. Affected versionversion=c948b5da6bbec742b433138e3e3f9537a85af2e5 <313343ab8cab7417973e7bdd43d3c3e93044b447
  3. Affected versionversion=c948b5da6bbec742b433138e3e3f9537a85af2e5 <42288cca984fb72ad3ebe43d4e7fdce9dcabfdb5
  4. Affected versionversion=c948b5da6bbec742b433138e3e3f9537a85af2e5 <856f1588a2590e70b119e76c15315615a36aebc8
  5. Affected versionversion=c948b5da6bbec742b433138e3e3f9537a85af2e5 <8d1b6738c1ab48c086b17e7994034aca94258931

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.7; version=c948b5da6bbec742b433138e3e3f9537a85af2e5 <313343ab8cab7417973e7bdd43d3c3e93044b447; version=c948b5da6bbec742b433138e3e3f9537a85af2e5 <42288cca984fb72ad3ebe43d4e7fdce9dcabfdb5; version=c948b5da6bbec742b433138e3e3f9537a85af2e5 <856f1588a2590e70b119e76c15315615a36aebc8; version=c948b5da6bbec742b433138e3e3f9537a85af2e5 <8d1b6738c1ab48c086b17e7994034aca94258931

Published CVSS scores

5.5Red HatCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5OracleCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5Amazon LinuxCVSS: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.

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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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-476NULL Pointer Dereference
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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