CVE-2023-54191

Kernel memory leak via unpurged MCU queues

Published Dec 30, 2025 · Updated Dec 30, 2025

Resource leakage in the Linux kernel mt7996 wireless driver 6.2 through 6.2.2 allows attackers to consume memory via MCU exit. When mt7996_firmware_state fails, mt7996_mcu_exit returns before purging queued MCU socket buffers, leaving their memory allocated. Exposure requires the mt7996 driver and the firmware-state failure path; upstream material identifies no attacker-controlled trigger or confirmed crash.

CVSS severityUnavailable
Unscored
EPSS probability0.19%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Resource leakage in the Linux kernel mt7996 wireless driver 6.2 through 6.2.2 allows attackers to consume memory via MCU exit. When mt7996_firmware_state fails, mt7996_mcu_exit returns before purging queued MCU socket buffers, leaving their memory allocated. Exposure requires the mt7996 driver and the firmware-state failure path; upstream material identifies no attacker-controlled trigger or confirmed crash.

The record

CVE
CVE-2023-54191
Published
Dec 30, 2025
Updated
Dec 30, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
Unavailable
Privileges
Unavailable

Timeline

How it unfolded

  1. Dec 30, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 30, 2025Record 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=98686cd21624c75a043e96812beadddf4f6f48e5 <b539d35e13e5d6b3dca76271261106b2356aa64c
  3. Affected versionversion=98686cd21624c75a043e96812beadddf4f6f48e5 <da5b4d93e141b52c5a71d0c41a042d1bcaf70d2e

What conditions does exploitation require?

Attack vectorUnavailable in this record.
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=6.2; version=98686cd21624c75a043e96812beadddf4f6f48e5 <b539d35e13e5d6b3dca76271261106b2356aa64c; version=98686cd21624c75a043e96812beadddf4f6f48e5 <da5b4d93e141b52c5a71d0c41a042d1bcaf70d2e

Published CVSS scores

No CVSS assessment is available in this record.

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
VectorUnavailable
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

No sourced classifications are available.

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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