CVE-2024-56586

Kernel crash via dirty F2FS root inode

Published Dec 27, 2024 · Updated May 11, 2026

Denial of service in the Linux kernel F2FS implementation allows local users to crash the kernel during filesystem unmount. After checkpoint-disabled file creation exhausts free segments, f2fs_enable_checkpoint leaves the root inode dirty when writeback fails, and f2fs_evict_inode triggers BUG_ON during unmount. Reaching the fault requires local access to mount and remount an F2FS filesystem, disable and re-enable checkpointing, exhaust its free space, and then unmount it; the bounded consequence is a kernel crash.

CVSS severity5.5
Medium
EPSS probability0.24%
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 F2FS implementation allows local users to crash the kernel during filesystem unmount. After checkpoint-disabled file creation exhausts free segments, f2fs_enable_checkpoint leaves the root inode dirty when writeback fails, and f2fs_evict_inode triggers BUG_ON during unmount. Reaching the fault requires local access to mount and remount an F2FS filesystem, disable and re-enable checkpointing, exhaust its free space, and then unmount it; the bounded consequence is a kernel crash.

The record

CVE
CVE-2024-56586
Published
Dec 27, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 27, 2024CVE 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=3.8
  2. Affected versionversion=98e4da8ca301e062d79ae168c67e56f3c3de3ce4 <9669b28f81e0ec6305af7773846fbe2cef1e7d61
  3. Affected versionversion=98e4da8ca301e062d79ae168c67e56f3c3de3ce4 <9e28513fd2858911dcf47b84160a8824587536b6
  4. Affected versionversion=98e4da8ca301e062d79ae168c67e56f3c3de3ce4 <a365de2fbfbe1e6740bfb75ab5c3245cf7bbe4d7
  5. Affected versionversion=98e4da8ca301e062d79ae168c67e56f3c3de3ce4 <ac8aaf78bd039fa1be0acaa8e84a56499f79d721
  6. Affected versionversion=98e4da8ca301e062d79ae168c67e56f3c3de3ce4 <d5c367ef8287fb4d235c46a2f8c8d68715f3a0ca
  7. Affected versionversion=98e4da8ca301e062d79ae168c67e56f3c3de3ce4 <dff561e4060d28edc9a2960d4a87f3c945a96aa3
  8. Affected versionversion=98e4da8ca301e062d79ae168c67e56f3c3de3ce4 <ef517d2d21c3d8e2ad35b2bb728bd1c90a31e617

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=3.8; version=98e4da8ca301e062d79ae168c67e56f3c3de3ce4 <9669b28f81e0ec6305af7773846fbe2cef1e7d61; version=98e4da8ca301e062d79ae168c67e56f3c3de3ce4 <9e28513fd2858911dcf47b84160a8824587536b6; version=98e4da8ca301e062d79ae168c67e56f3c3de3ce4 <a365de2fbfbe1e6740bfb75ab5c3245cf7bbe4d7; version=98e4da8ca301e062d79ae168c67e56f3c3de3ce4 <ac8aaf78bd039fa1be0acaa8e84a56499f79d721; version=98e4da8ca301e062d79ae168c67e56f3c3de3ce4 <d5c367ef8287fb4d235c46a2f8c8d68715f3a0ca; version=98e4da8ca301e062d79ae168c67e56f3c3de3ce4 <dff561e4060d28edc9a2960d4a87f3c945a96aa3; version=98e4da8ca301e062d79ae168c67e56f3c3de3ce4 <ef517d2d21c3d8e2ad35b2bb728bd1c90a31e617

Published CVSS scores

5.5NVDCVSS: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 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 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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