CVE-2023-53846Public exploit

Kernel memory corruption via unchecked F2FS node reference

Published Dec 9, 2025 · Updated Aug 5, 2026

Out-of-bounds access in Linux F2FS 3.8 through 6.4.9 allows local users to corrupt kernel memory through a crafted filesystem image. truncate_dnode() trusts a direct-node reference from on-disk metadata and iterates inodeB's address array past the valid node-page boundary. Mounting the crafted F2FS image and truncating its file requires local access; the overwrite can corrupt other files' blocks or panic the kernel.

CVSS severity7.8
High
EPSS probability0.17%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds access in Linux F2FS 3.8 through 6.4.9 allows local users to corrupt kernel memory through a crafted filesystem image. truncate_dnode() trusts a direct-node reference from on-disk metadata and iterates inodeB's address array past the valid node-page boundary. Mounting the crafted F2FS image and truncating its file requires local access; the overwrite can corrupt other files' blocks or panic the kernel.

The record

CVE
CVE-2023-53846
Published
Dec 9, 2025
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 9, 2025CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 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=3.8
  2. Affected versionversion=98e4da8ca301e062d79ae168c67e56f3c3de3ce4 <a6ec83786ab9f13f25fb18166dee908845713a95
  3. Affected versionversion=98e4da8ca301e062d79ae168c67e56f3c3de3ce4 <af0f716ad3b039cab9d426da63a5ee6c88751185

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=3.8; version=98e4da8ca301e062d79ae168c67e56f3c3de3ce4 <a6ec83786ab9f13f25fb18166dee908845713a95; version=98e4da8ca301e062d79ae168c67e56f3c3de3ce4 <af0f716ad3b039cab9d426da63a5ee6c88751185

Published CVSS scores

7.8LinuxCVSS: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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

T1499.004Application or System Exploitation

Public exploit references

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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