CVE-2024-43857

Local kernel crash via null zone-device pointer

Published Aug 17, 2024 · Updated May 11, 2026

Null pointer dereference in Linux f2fs 6.5 through 6.10.2 allows local users to crash the kernel while processing a mounted filesystem. When f2fs is mounted on a single device, is_end_zone_blkaddr() reads the last zone block through a potentially null device pointer. Low-privileged local access and a single-device f2fs mount are required; the documented consequence is service interruption, not data access or modification.

CVSS severity5.5
Medium
EPSS probability0.21%
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 Linux f2fs 6.5 through 6.10.2 allows local users to crash the kernel while processing a mounted filesystem. When f2fs is mounted on a single device, is_end_zone_blkaddr() reads the last zone block through a potentially null device pointer. Low-privileged local access and a single-device f2fs mount are required; the documented consequence is service interruption, not data access or modification.

The record

CVE
CVE-2024-43857
Published
Aug 17, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-476, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 17, 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

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=6.5
  2. Affected versionversion=e067dc3c6b9c419bac43c6a0be2d85f44681f863 <381cbe85592c78fbaeb3e770e3e9f3bfa3e67efb
  3. Affected versionversion=e067dc3c6b9c419bac43c6a0be2d85f44681f863 <b98777309756ebe15cc9ad4e8ab64bbfaf878a3f
  4. Affected versionversion=e067dc3c6b9c419bac43c6a0be2d85f44681f863 <c82bc1ab2a8a5e73d9728e80c4c2ed87e8921a38

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.5; version=e067dc3c6b9c419bac43c6a0be2d85f44681f863 <381cbe85592c78fbaeb3e770e3e9f3bfa3e67efb; version=e067dc3c6b9c419bac43c6a0be2d85f44681f863 <b98777309756ebe15cc9ad4e8ab64bbfaf878a3f; version=e067dc3c6b9c419bac43c6a0be2d85f44681f863 <c82bc1ab2a8a5e73d9728e80c4c2ed87e8921a38

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 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

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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