CVE-2023-53832

Kernel crash via unallocated replacement buffer dereference

Published Dec 9, 2025 · Updated May 11, 2026

Null-pointer dereference in Linux md/raid10 allows local users with storage-administration privileges to crash the kernel during array recovery. A skipped recovery calls init_resync() but not close_sync(), leaving have_replacement cleared so raid10_sync_request() fails to allocate repl_bio before dereferencing it. Reachability requires a completed RAID10 resync, a skipped recovery, I/O errors, and addition of a replacement device before recovery runs again.

CVSS severityUnavailable
Unscored
EPSS probability0.26%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Null-pointer dereference in Linux md/raid10 allows local users with storage-administration privileges to crash the kernel during array recovery. A skipped recovery calls init_resync() but not close_sync(), leaving have_replacement cleared so raid10_sync_request() fails to allocate repl_bio before dereferencing it. Reachability requires a completed RAID10 resync, a skipped recovery, I/O errors, and addition of a replacement device before recovery runs again.

The record

CVE
CVE-2023-53832
Published
Dec 9, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Dec 9, 2025CVE publishedPublication date reported by the CVE source.
  2. May 11, 2026Record 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=3.10
  2. Affected versionversion=7e83ccbecd608b971f340e951c9e84cd0343002f <14964127be77884003976a392c9faa9ebaabbbe1
  3. Affected versionversion=7e83ccbecd608b971f340e951c9e84cd0343002f <38d33593260536840b49fd1dcac9aedfd14a9d42
  4. Affected versionversion=7e83ccbecd608b971f340e951c9e84cd0343002f <68695084077e3de9d3e94e09238ace2b6f246446
  5. Affected versionversion=7e83ccbecd608b971f340e951c9e84cd0343002f <99b503e4edc5938885d839cf0e7571963f75d800
  6. Affected versionversion=7e83ccbecd608b971f340e951c9e84cd0343002f <9e9efc77efd1956cc244af975240f2513d78a371
  7. Affected versionversion=7e83ccbecd608b971f340e951c9e84cd0343002f <a405c6f0229526160aa3f177f65e20c86fce84c5
  8. Affected versionversion=7e83ccbecd608b971f340e951c9e84cd0343002f <b50fd1c3d9d0175aa29ff2706ef36cc178bc356a
  9. Affected versionversion=7e83ccbecd608b971f340e951c9e84cd0343002f <bdbf104b1c91fbf38f82c522ebf75429f094292a

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

The Linux Kernel Organization · Linuxversion=3.10; version=7e83ccbecd608b971f340e951c9e84cd0343002f <14964127be77884003976a392c9faa9ebaabbbe1; version=7e83ccbecd608b971f340e951c9e84cd0343002f <38d33593260536840b49fd1dcac9aedfd14a9d42; version=7e83ccbecd608b971f340e951c9e84cd0343002f <68695084077e3de9d3e94e09238ace2b6f246446; version=7e83ccbecd608b971f340e951c9e84cd0343002f <99b503e4edc5938885d839cf0e7571963f75d800; version=7e83ccbecd608b971f340e951c9e84cd0343002f <9e9efc77efd1956cc244af975240f2513d78a371; version=7e83ccbecd608b971f340e951c9e84cd0343002f <a405c6f0229526160aa3f177f65e20c86fce84c5; version=7e83ccbecd608b971f340e951c9e84cd0343002f <b50fd1c3d9d0175aa29ff2706ef36cc178bc356a; version=7e83ccbecd608b971f340e951c9e84cd0343002f <bdbf104b1c91fbf38f82c522ebf75429f094292a

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.

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No observations available

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

Weakness, pattern, technique

T1499.004Application 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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