CVE-2024-53221

Local kernel crash via premature filesystem registration

Published Dec 27, 2024 · Updated Jun 1, 2026

NULL pointer dereference in the Linux F2FS driver allows local users to crash the kernel by racing module loading with a filesystem mount. init_f2fs_fs() registers f2fs_fs_type before the module's bioset is initialized, allowing f2fs_submit_page_bio() to pass a null bioset to __bio_alloc(). The race requires local privileges sufficient to overlap F2FS module loading with an F2FS mount; no remote impact is reported.

CVSS severity5.5
Medium
EPSS probability0.22%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

NULL pointer dereference in the Linux F2FS driver allows local users to crash the kernel by racing module loading with a filesystem mount. init_f2fs_fs() registers f2fs_fs_type before the module's bioset is initialized, allowing f2fs_submit_page_bio() to pass a null bioset to __bio_alloc(). The race requires local privileges sufficient to overlap F2FS module loading with an F2FS mount; no remote impact is reported.

The record

CVE
CVE-2024-53221
Published
Dec 27, 2024
Updated
Jun 1, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-476, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 27, 2024CVE publishedPublication date reported by the CVE source.
  2. Jun 1, 2026Record 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=5.6
  2. Affected versionversion=f543805fcd60f3f9a491cfa2f2dc9284d2569c28 <32f5e291b7677495f98246eec573767430321c08
  3. Affected versionversion=f543805fcd60f3f9a491cfa2f2dc9284d2569c28 <4289be8465924748daa9bf14866eb7f0987d4e39
  4. Affected versionversion=f543805fcd60f3f9a491cfa2f2dc9284d2569c28 <8dddc12d03248755d9f709bc1eb9e3ea2bf1b322
  5. Affected versionversion=f543805fcd60f3f9a491cfa2f2dc9284d2569c28 <9e11b1d5fda972f6be60ab732976a7c8e064cd56
  6. Affected versionversion=f543805fcd60f3f9a491cfa2f2dc9284d2569c28 <b7d0a97b28083084ebdd8e5c6bccd12e6ec18faa
  7. Affected versionversion=f543805fcd60f3f9a491cfa2f2dc9284d2569c28 <bd9197b72d772be7bccc3b66c83a3157cfe2f96f

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.6; version=f543805fcd60f3f9a491cfa2f2dc9284d2569c28 <32f5e291b7677495f98246eec573767430321c08; version=f543805fcd60f3f9a491cfa2f2dc9284d2569c28 <4289be8465924748daa9bf14866eb7f0987d4e39; version=f543805fcd60f3f9a491cfa2f2dc9284d2569c28 <8dddc12d03248755d9f709bc1eb9e3ea2bf1b322; version=f543805fcd60f3f9a491cfa2f2dc9284d2569c28 <9e11b1d5fda972f6be60ab732976a7c8e064cd56; version=f543805fcd60f3f9a491cfa2f2dc9284d2569c28 <b7d0a97b28083084ebdd8e5c6bccd12e6ec18faa; version=f543805fcd60f3f9a491cfa2f2dc9284d2569c28 <bd9197b72d772be7bccc3b66c83a3157cfe2f96f

Published CVSS scores

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

CWE-476NULL Pointer Dereference
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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