CVE-2026-68193

System crash via non-MMIO TXRX_NOTIFY NULL callback

Published Aug 10, 2026 · Updated Aug 10, 2026

NULL pointer dereference in the Linux mt7925 Wi-Fi driver allows remote attackers to crash systems via crafted Wi-Fi traffic. The receive handlers send an MMIO-only TXRX_NOTIFY event to mt7925_mac_tx_free on USB, where queue cleanup calls an unimplemented tx_cleanup callback. Exposure requires an affected kernel from 6.7 and MediaTek mt7925 hardware on a non-MMIO bus; the resulting NULL call crashes the kernel RX worker.

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

NULL pointer dereference in the Linux mt7925 Wi-Fi driver allows remote attackers to crash systems via crafted Wi-Fi traffic. The receive handlers send an MMIO-only TXRX_NOTIFY event to mt7925_mac_tx_free on USB, where queue cleanup calls an unimplemented tx_cleanup callback. Exposure requires an affected kernel from 6.7 and MediaTek mt7925 hardware on a non-MMIO bus; the resulting NULL call crashes the kernel RX worker.

The record

CVE
CVE-2026-68193
Published
Aug 10, 2026
Updated
Aug 10, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-476, T1499
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 10, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 10, 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 <0c8c4cd0ca60b45c4b05a39e3769b8473d6836eb
  3. Affected versionversion=c948b5da6bbec742b433138e3e3f9537a85af2e5 <9677e86a5f7d680fe280a5f8999bc57353e360d7
  4. Affected versionversion=c948b5da6bbec742b433138e3e3f9537a85af2e5 <9cb72f67e1502aabba51aab9ac04ae7c386ee194
  5. Affected versionversion=c948b5da6bbec742b433138e3e3f9537a85af2e5 <feeff151c83e7f0ffcdedcad5343852d23d1f6e1

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.7; version=c948b5da6bbec742b433138e3e3f9537a85af2e5 <0c8c4cd0ca60b45c4b05a39e3769b8473d6836eb; version=c948b5da6bbec742b433138e3e3f9537a85af2e5 <9677e86a5f7d680fe280a5f8999bc57353e360d7; version=c948b5da6bbec742b433138e3e3f9537a85af2e5 <9cb72f67e1502aabba51aab9ac04ae7c386ee194; version=c948b5da6bbec742b433138e3e3f9537a85af2e5 <feeff151c83e7f0ffcdedcad5343852d23d1f6e1

Published CVSS scores

5.5Red HatCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.3Amazon LinuxCVSS:3.1/AV:A/AC:H/PR:N/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)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-476NULL Pointer Dereference
T1499Endpoint Denial of Service

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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