CVE-2023-52458

Kernel crash via misaligned partition length

Published Feb 23, 2024 · Updated May 12, 2026

Improper partition validation in affected Linux kernels beginning with 4.10 allows local users to crash the kernel via a misaligned size. The block ioctl add and resize paths accept lengths not aligned to the device's logical block size, after which bio_truncate() shortens the final read and bio_integrity_free() dereferences a null pointer. The crash requires a logical block size above 512 bytes and integrity data support; without integrity data, the malformed final read returns an I/O error.

CVSS severity5.5
Medium
EPSS probability0.23%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper partition validation in affected Linux kernels beginning with 4.10 allows local users to crash the kernel via a misaligned size. The block ioctl add and resize paths accept lengths not aligned to the device's logical block size, after which bio_truncate() shortens the final read and bio_integrity_free() dereferences a null pointer. The crash requires a logical block size above 512 bytes and integrity data support; without integrity data, the malformed final read returns an I/O error.

The record

CVE
CVE-2023-52458
Published
Feb 23, 2024
Updated
May 12, 2026
Vendor
Siemens
Product
SIMATIC S7-1500 TM MFP - GNU/Linux subsystem
Classifications
CWE-476, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 23, 2024CVE publishedPublication date reported by the CVE source.
  2. May 12, 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=0 <*

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Siemens · SIMATIC S7-1500 TM MFP - GNU/Linux subsystemversion=0 <*
The Linux Kernel Organization · Linuxversion=4.10; version=633395b67bb222f85bb8f825c7751a54b9ec84ee <5010c27120962c85d2f421d2cf211791c9603503; version=633395b67bb222f85bb8f825c7751a54b9ec84ee <6f64f866aa1ae6975c95d805ed51d7e9433a0016; version=633395b67bb222f85bb8f825c7751a54b9ec84ee <8f6dfa1f1efe6dcca2d43e575491d8fcbe922f62; version=633395b67bb222f85bb8f825c7751a54b9ec84ee <bcdc288e7bc008daf38ef0401b53e4a8bb61bbe5; version=633395b67bb222f85bb8f825c7751a54b9ec84ee <cb16cc1abda18a9514106d2ac8c8d7abc0be5ed8; version=633395b67bb222f85bb8f825c7751a54b9ec84ee <ef31cc87794731ffcb578a195a2c47d744e25fb8

Published CVSS scores

5.5Siemens ProductCERTCVSS: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
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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