CVE-2023-53430

Kernel-memory exhaustion via incomplete receive-queue cleanup

Published Sep 18, 2025 · Updated Sep 18, 2025

Memory leak in the mt76 DMA cleanup code in Linux 6.2 through 6.2.2 allows local users to consume kernel memory during device unregister. In drivers/net/wireless/mediatek/mt76/dma.c, mt76_dma_cleanup conditionally calls mt76_dma_rx_cleanup only for WED-marked queues, leaving other configured receive queues allocated. Reachability requires an mt76-based wireless device and access to its unregister path; the bounded consequence is service interruption through kernel-memory exhaustion.

CVSS severity5.5
Medium
EPSS probability0.13%
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 mt76 DMA cleanup code in Linux 6.2 through 6.2.2 allows local users to consume kernel memory during device unregister. In drivers/net/wireless/mediatek/mt76/dma.c, mt76_dma_cleanup conditionally calls mt76_dma_rx_cleanup only for WED-marked queues, leaving other configured receive queues allocated. Reachability requires an mt76-based wireless device and access to its unregister path; the bounded consequence is service interruption through kernel-memory exhaustion.

The record

CVE
CVE-2023-53430
Published
Sep 18, 2025
Updated
Sep 18, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-401
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 18, 2025CVE publishedPublication date reported by the CVE source.
  2. Sep 18, 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=52546e27787ed005413ac622ae9e4c3087100b50 <3f7dda36e0b6dfa2cd26191f754ba061ab8191f2
  2. Affected versionversion=52546e27787ed005413ac622ae9e4c3087100b50 <604990fee0a6d608a6cca179ae474f2a1c6add8a
  3. Affected versionversion=6.2

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=52546e27787ed005413ac622ae9e4c3087100b50 <3f7dda36e0b6dfa2cd26191f754ba061ab8191f2; version=52546e27787ed005413ac622ae9e4c3087100b50 <604990fee0a6d608a6cca179ae474f2a1c6add8a; version=6.2

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5CISA-ADPCVSS: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

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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

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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