CVE-2023-53140

Service interruption via SCSI module reload race

Published May 2, 2025 · Updated May 11, 2026

Race condition in the Linux kernel SCSI core allows local users to interrupt service by concurrently unloading and reloading a module. The SCSI removal path defers scsi_proc_hostdir_rm(), so a reload can call proc_mkdir() while the prior /proc/scsi directory remains registered. Triggering requires CAP_SYS_MODULE in the initial user namespace, and the published trace demonstrates a duplicate-registration warning rather than code execution.

CVSS severity5.5
Medium
EPSS probability0.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Race condition in the Linux kernel SCSI core allows local users to interrupt service by concurrently unloading and reloading a module. The SCSI removal path defers scsi_proc_hostdir_rm(), so a reload can call proc_mkdir() while the prior /proc/scsi directory remains registered. Triggering requires CAP_SYS_MODULE in the initial user namespace, and the published trace demonstrates a duplicate-registration warning rather than code execution.

The record

CVE
CVE-2023-53140
Published
May 2, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-401
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. May 2, 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=2.6.30
  2. Affected versionversion=77c019768f0607c36e25bec11ce3e1eabef09277 <13daafe1e209b03e9bda16ff2bd2b2da145a139b
  3. Affected versionversion=77c019768f0607c36e25bec11ce3e1eabef09277 <17e98a5ede81b7696bec421f7afa2dfe467f5e6b
  4. Affected versionversion=77c019768f0607c36e25bec11ce3e1eabef09277 <1ec363599f8346d5a8d08c71a0d9860d6c420ec0
  5. Affected versionversion=77c019768f0607c36e25bec11ce3e1eabef09277 <6b223e32d66ca9db1f252f433514783d8b22a8e1
  6. Affected versionversion=77c019768f0607c36e25bec11ce3e1eabef09277 <891a3cba425cf483d96facca55aebd6ff1da4338
  7. Affected versionversion=77c019768f0607c36e25bec11ce3e1eabef09277 <e471e928de97b00f297ad1015cc14f9459765713
  8. Affected versionversion=77c019768f0607c36e25bec11ce3e1eabef09277 <fc663711b94468f4e1427ebe289c9f05669699c9

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

The Linux Kernel Organization · Linuxversion=2.6.30; version=77c019768f0607c36e25bec11ce3e1eabef09277 <13daafe1e209b03e9bda16ff2bd2b2da145a139b; version=77c019768f0607c36e25bec11ce3e1eabef09277 <17e98a5ede81b7696bec421f7afa2dfe467f5e6b; version=77c019768f0607c36e25bec11ce3e1eabef09277 <1ec363599f8346d5a8d08c71a0d9860d6c420ec0; version=77c019768f0607c36e25bec11ce3e1eabef09277 <6b223e32d66ca9db1f252f433514783d8b22a8e1; version=77c019768f0607c36e25bec11ce3e1eabef09277 <891a3cba425cf483d96facca55aebd6ff1da4338; version=77c019768f0607c36e25bec11ce3e1eabef09277 <e471e928de97b00f297ad1015cc14f9459765713; version=77c019768f0607c36e25bec11ce3e1eabef09277 <fc663711b94468f4e1427ebe289c9f05669699c9

Published CVSS scores

5.5NIST NVDCVSS: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 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

CWE-401Missing Release of Memory after Effective Lifetime

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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