CVE-2024-53220

System panic via undercounted F2FS dirty data

Published Dec 27, 2024 · Updated Aug 5, 2026

Denial of service in Linux kernel F2FS allows local users to trigger a system panic via writes under two mount configurations. The __get_secs_required() path fails to count dirty overwritten data when checkpoint disabling and LFS mode are both active, so block allocation consumes more free segments than calculated. A local user must write to an F2FS filesystem mounted in both modes; exhausting the miscounted segments reaches a kernel BUG and crashes the host.

CVSS severity5.5
Medium
EPSS probability0.23%
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 Linux kernel F2FS allows local users to trigger a system panic via writes under two mount configurations. The __get_secs_required() path fails to count dirty overwritten data when checkpoint disabling and LFS mode are both active, so block allocation consumes more free segments than calculated. A local user must write to an F2FS filesystem mounted in both modes; exhausting the miscounted segments reaches a kernel BUG and crashes the host.

The record

CVE
CVE-2024-53220
Published
Dec 27, 2024
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 27, 2024CVE 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=4.20
  2. Affected versionversion=4354994f097d068a894aa1a0860da54571df3582 <1acd73edbbfef2c3c5b43cba4006a7797eca7050
  3. Affected versionversion=4354994f097d068a894aa1a0860da54571df3582 <6e58b2987960efcd917bc42da781cee256213618
  4. Affected versionversion=4354994f097d068a894aa1a0860da54571df3582 <9313b85ddc120e2d2f0efaf86d0204d4c98d60b1
  5. Affected versionversion=4354994f097d068a894aa1a0860da54571df3582 <e812871c068cc0f91ff9f5cee87d00df1c44aae4
  6. Affected versionversion=4354994f097d068a894aa1a0860da54571df3582 <f1b8bfe8d2f2fdf905d37c174d5bc1cd2b6910c5

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.20; version=4354994f097d068a894aa1a0860da54571df3582 <1acd73edbbfef2c3c5b43cba4006a7797eca7050; version=4354994f097d068a894aa1a0860da54571df3582 <6e58b2987960efcd917bc42da781cee256213618; version=4354994f097d068a894aa1a0860da54571df3582 <9313b85ddc120e2d2f0efaf86d0204d4c98d60b1; version=4354994f097d068a894aa1a0860da54571df3582 <e812871c068cc0f91ff9f5cee87d00df1c44aae4; version=4354994f097d068a894aa1a0860da54571df3582 <f1b8bfe8d2f2fdf905d37c174d5bc1cd2b6910c5

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

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

T1499.004Endpoint Denial of Service: Application 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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