CVE-2023-53380

Local system crash via RAID10 replacement race

Published Sep 18, 2025 · Updated Sep 18, 2025

A NULL pointer dereference in Linux kernel RAID10 synchronization allows local users to crash the system through a replacement race. In raid10_sync_request(), the first mreplace check sets need_replace, but a second check can null mreplace after its Faulty flag changes without clearing need_replace, so later code dereferences NULL. The race requires low-privileged local access and a RAID10 replacement whose Faulty state changes between the checks; the reported consequence is limited to availability.

CVSS severity5.5
Medium
EPSS probability0.14%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

A NULL pointer dereference in Linux kernel RAID10 synchronization allows local users to crash the system through a replacement race. In raid10_sync_request(), the first mreplace check sets need_replace, but a second check can null mreplace after its Faulty flag changes without clearing need_replace, so later code dereferences NULL. The race requires low-privileged local access and a RAID10 replacement whose Faulty state changes between the checks; the reported consequence is limited to availability.

The record

CVE
CVE-2023-53380
Published
Sep 18, 2025
Updated
Sep 18, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-476, T1499.004
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=4.20
  2. Affected versionversion=ee37d7314a32ab6809eacc3389bad0406c69a81f <144c7fd008e0072b0b565f1157eec618de54ca8a
  3. Affected versionversion=ee37d7314a32ab6809eacc3389bad0406c69a81f <222cc459d59857ee28a5366dc225ab42b22f9272
  4. Affected versionversion=ee37d7314a32ab6809eacc3389bad0406c69a81f <2990e2ece18dd4cca71b3109c80517ad94adb065
  5. Affected versionversion=ee37d7314a32ab6809eacc3389bad0406c69a81f <34817a2441747b48e444cb0e05d84e14bc9443da
  6. Affected versionversion=ee37d7314a32ab6809eacc3389bad0406c69a81f <45fa023b3334a7ae6f6c4eb977295804222dfa28
  7. Affected versionversion=ee37d7314a32ab6809eacc3389bad0406c69a81f <b5015b97adda6a24dd3e713c63e521ecbeff25c6
  8. Affected versionversion=ee37d7314a32ab6809eacc3389bad0406c69a81f <f4368a462b1f9a8ecc2fdb09a28c3d4cad302a4f

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.20; version=ee37d7314a32ab6809eacc3389bad0406c69a81f <144c7fd008e0072b0b565f1157eec618de54ca8a; version=ee37d7314a32ab6809eacc3389bad0406c69a81f <222cc459d59857ee28a5366dc225ab42b22f9272; version=ee37d7314a32ab6809eacc3389bad0406c69a81f <2990e2ece18dd4cca71b3109c80517ad94adb065; version=ee37d7314a32ab6809eacc3389bad0406c69a81f <34817a2441747b48e444cb0e05d84e14bc9443da; version=ee37d7314a32ab6809eacc3389bad0406c69a81f <45fa023b3334a7ae6f6c4eb977295804222dfa28; version=ee37d7314a32ab6809eacc3389bad0406c69a81f <b5015b97adda6a24dd3e713c63e521ecbeff25c6; version=ee37d7314a32ab6809eacc3389bad0406c69a81f <f4368a462b1f9a8ecc2fdb09a28c3d4cad302a4f

Published CVSS scores

7.0Amazon LinuxCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
5.5NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5UbuntuCVSS: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-476NULL Pointer Dereference
T1499.004Application or System Exploitation

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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