CVE-2023-53429

Local service interruption via PageError state leakage

Published Sep 18, 2025 · Updated Sep 18, 2025

Improper error handling in Linux btrfs before 6.4.7 allows local users to interrupt filesystem writeback through fast I/O completion. __extent_writepage checks the shared PageError bit after submission, allowing an end-I/O error from sufficiently fast I/O to leak into submission-context cleanup. Reachability requires local access to a btrfs filesystem and an I/O error that completes during submission; the published availability assessment identifies no specific hang, crash, or reboot.

CVSS severity7.8
High
EPSS probability0.13%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper error handling in Linux btrfs before 6.4.7 allows local users to interrupt filesystem writeback through fast I/O completion. __extent_writepage checks the shared PageError bit after submission, allowing an end-I/O error from sufficiently fast I/O to leak into submission-context cleanup. Reachability requires local access to a btrfs filesystem and an I/O error that completes during submission; the published availability assessment identifies no specific hang, crash, or reboot.

The record

CVE
CVE-2023-53429
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 <3e92499e3b004baffb479d61e191b41b604ece9a
  2. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <d40be032ecd8ee1ca033bee43c7755d21fb4d72a

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <3e92499e3b004baffb479d61e191b41b604ece9a; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <d40be032ecd8ee1ca033bee43c7755d21fb4d72a

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5CISA-ADPCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
7.8kernel.orgCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/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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