CVE-2024-20019Network attack vector

Remote denial of service via WLAN memory leak

Published Mar 4, 2024 · Updated Aug 1, 2024

A memory leak in the MediaTek MT7925 and MT7927 WLAN driver release 2023.11.10 and earlier allows remote attackers to cause denial of service. The driver mishandles untrusted WLAN input by failing to release allocated memory after its effective lifetime, progressively exhausting available memory. No privileges or user interaction are required, and the disclosed consequence is limited to service interruption from memory exhaustion.

CVSS severity5.9
Medium
EPSS probability0.72%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

A memory leak in the MediaTek MT7925 and MT7927 WLAN driver release 2023.11.10 and earlier allows remote attackers to cause denial of service. The driver mishandles untrusted WLAN input by failing to release allocated memory after its effective lifetime, progressively exhausting available memory. No privileges or user interaction are required, and the disclosed consequence is limited to service interruption from memory exhaustion.

The record

CVE
CVE-2024-20019
Published
Mar 4, 2024
Updated
Aug 1, 2024
Vendor
MediaTek
Product
MediaTek MT7925
Classifications
CWE-401, CWE-200, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 4, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 1, 2024Record 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=-0 <2023.11.10

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

MediaTek · MediaTek MT7925version=-0 <2023.11.10
MediaTek · MediaTek MT7927version=0 <2023.11.10

Published CVSS scores

5.9CISA-ADPCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-401Missing Release of Memory after Effective Lifetime
CWE-200Exposure of Sensitive Information to an Unauthorized Actor
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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