CVE-2023-53337

Service interruption via post-read-only log writes

Published Sep 17, 2025 · Updated Sep 17, 2025

Improper state handling in Linux nilfs2 allows local users to interrupt service after metadata corruption forces read-only mode. nilfs_segctor_do_construct() continues log construction and passes buffer heads whose uptodate flag was cleared to mark_buffer_dirty(). Reachability requires a mounted NILFS2 filesystem already degraded by metadata corruption; the published impact is availability loss only.

CVSS severity5.5
Medium
EPSS probability0.20%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper state handling in Linux nilfs2 allows local users to interrupt service after metadata corruption forces read-only mode. nilfs_segctor_do_construct() continues log construction and passes buffer heads whose uptodate flag was cleared to mark_buffer_dirty(). Reachability requires a mounted NILFS2 filesystem already degraded by metadata corruption; the published impact is availability loss only.

The record

CVE
CVE-2023-53337
Published
Sep 17, 2025
Updated
Sep 17, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 17, 2025CVE publishedPublication date reported by the CVE source.
  2. Sep 17, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <13f73ef77baa4764dc1ca4fcbae9cade05b83866
  2. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <28a65b49eb53e172d23567005465019658bfdb4d
  3. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <4005cec6847c06ee191583270b7cdd7e696543cc
  4. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <4569a292a84e340e97d178898ad1cfe1a3080a61
  5. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <55f7810632f993cff622a0ddbc7c865892294b61
  6. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <7c3e662048053802f6b0db3a78e97f4e1f7edc4f
  7. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <a73201c607d8e506358d60aafddda4246bdd9350
  8. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <bd89073fc7a5d03b1d06b372addbe405e5a925f4
  9. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <e9c5412c5972124776c1b873533eb39e287a4dfa

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <13f73ef77baa4764dc1ca4fcbae9cade05b83866; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <28a65b49eb53e172d23567005465019658bfdb4d; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <4005cec6847c06ee191583270b7cdd7e696543cc; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <4569a292a84e340e97d178898ad1cfe1a3080a61; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <55f7810632f993cff622a0ddbc7c865892294b61; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <7c3e662048053802f6b0db3a78e97f4e1f7edc4f; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <a73201c607d8e506358d60aafddda4246bdd9350; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <bd89073fc7a5d03b1d06b372addbe405e5a925f4; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <e9c5412c5972124776c1b873533eb39e287a4dfa

Published CVSS scores

5.5UbuntuCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5CISACVSS: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

T1499Endpoint Denial of Service

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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