CVE-2023-53466

Service interruption via unpurged MCU queues

Published Oct 1, 2025 · Updated Oct 1, 2025

Memory leak in the mt7915 Wi-Fi driver in Linux 5.8 through 6.1.15 and 6.2 through 6.2.2 allows local users to interrupt service. The mt7915_mcu_exit routine returns when firmware-state cleanup fails, leaving queued MCU socket buffers unpurged. Low-privileged local access and affected mt7915 hardware are required; retained kernel memory creates an availability-only condition.

CVSS severity5.5
Medium
EPSS probability0.15%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Memory leak in the mt7915 Wi-Fi driver in Linux 5.8 through 6.1.15 and 6.2 through 6.2.2 allows local users to interrupt service. The mt7915_mcu_exit routine returns when firmware-state cleanup fails, leaving queued MCU socket buffers unpurged. Low-privileged local access and affected mt7915 hardware are required; retained kernel memory creates an availability-only condition.

The record

CVE
CVE-2023-53466
Published
Oct 1, 2025
Updated
Oct 1, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-401, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 1, 2025CVE publishedPublication date reported by the CVE source.
  2. Oct 1, 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=5.8
  2. Affected versionversion=e57b7901469fc0b021930b83a8094baaf3d81b09 <3095fe1e1d3198e62a3c7116c4cf7c734871475f
  3. Affected versionversion=e57b7901469fc0b021930b83a8094baaf3d81b09 <49bd78282e79ad177d14f37f4049f0605bf92dad
  4. Affected versionversion=e57b7901469fc0b021930b83a8094baaf3d81b09 <4cbb876153b63fe248200f734069c6881cf97722

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.8; version=e57b7901469fc0b021930b83a8094baaf3d81b09 <3095fe1e1d3198e62a3c7116c4cf7c734871475f; version=e57b7901469fc0b021930b83a8094baaf3d81b09 <49bd78282e79ad177d14f37f4049f0605bf92dad; version=e57b7901469fc0b021930b83a8094baaf3d81b09 <4cbb876153b63fe248200f734069c6881cf97722

Published CVSS scores

5.5NIST NVDCVSS: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 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

CWE-401Missing Release of Memory after Effective Lifetime
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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