CVE-2023-53431

Host crash via invalid enclosure teardown free

Published Sep 18, 2025 · Updated Sep 18, 2025

Denial of service in the Linux kernel SCSI enclosure-services driver allows attackers to crash the host via a zero-component enclosure. When ses_intf_add records zero components, ses_intf_remove_enclosure dereferences edev->component[0].scratch and passes an invalid pointer to kfree during teardown. A reachable SES target must advertise no device components and then disconnect; the resulting invalid free causes a kernel oops or panic.

CVSS severity5.5
Medium
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in the Linux kernel SCSI enclosure-services driver allows attackers to crash the host via a zero-component enclosure. When ses_intf_add records zero components, ses_intf_remove_enclosure dereferences edev->component[0].scratch and passes an invalid pointer to kfree during teardown. A reachable SES target must advertise no device components and then disconnect; the resulting invalid free causes a kernel oops or panic.

The record

CVE
CVE-2023-53431
Published
Sep 18, 2025
Updated
Sep 18, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
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=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <3fe97ff3d94934649abb0652028dd7296170c8d0
  2. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <4863fefc8a8cc8e8f6c7635b12d9dffaa0a12d86
  3. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <5ca5470b33e5221dd3e5be81108697c22dd38b56
  4. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <6069e04a922a0488bcf4f1017d38d18afda8194c
  5. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <6fce2307650a190e343a84537c278d499fa37c26
  6. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <d68937dfc73ee7f61cf3424fa3225be93cacaa00
  7. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <f182ad02024d3f45374a9e0c9d76f28b776d762d
  8. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <feefd5232ecb788f0666f75893a7a86faec8bbcc

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <3fe97ff3d94934649abb0652028dd7296170c8d0; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <4863fefc8a8cc8e8f6c7635b12d9dffaa0a12d86; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <5ca5470b33e5221dd3e5be81108697c22dd38b56; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <6069e04a922a0488bcf4f1017d38d18afda8194c; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <6fce2307650a190e343a84537c278d499fa37c26; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <d68937dfc73ee7f61cf3424fa3225be93cacaa00; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <f182ad02024d3f45374a9e0c9d76f28b776d762d; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <feefd5232ecb788f0666f75893a7a86faec8bbcc

Published CVSS scores

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

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

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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